Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops
A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Liu, Zong-Kai [verfasserIn] |
|---|
| Format: |
E-Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2018transfer abstract |
|---|
| Schlagwörter: |
|---|
| Umfang: |
15 |
|---|
| Übergeordnetes Werk: |
Enthalten in: The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol - Ide, C.V. ELSEVIER, 2017, a journal on accelerators, instrumentation and techniques applied to research in nuclear and atomic physics, materials science and related fields in physics, Amsterdam |
|---|---|
| Übergeordnetes Werk: |
volume:894 ; year:2018 ; day:21 ; month:06 ; pages:57-71 ; extent:15 |
| Links: |
|---|
| DOI / URN: |
10.1016/j.nima.2018.03.046 |
|---|
| Katalog-ID: |
ELV042784085 |
|---|
| LEADER | 01000caa a22002652 4500 | ||
|---|---|---|---|
| 001 | ELV042784085 | ||
| 003 | DE-627 | ||
| 005 | 20230626002256.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 180726s2018 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1016/j.nima.2018.03.046 |2 doi | |
| 028 | 5 | 2 | |a GBV00000000000496.pica |
| 035 | |a (DE-627)ELV042784085 | ||
| 035 | |a (ELSEVIER)S0168-9002(18)30395-4 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 082 | 0 | 4 | |a 610 |q VZ |
| 084 | |a 44.90 |2 bkl | ||
| 100 | 1 | |a Liu, Zong-Kai |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops |
| 264 | 1 | |c 2018transfer abstract | |
| 300 | |a 15 | ||
| 336 | |a nicht spezifiziert |b zzz |2 rdacontent | ||
| 337 | |a nicht spezifiziert |b z |2 rdamedia | ||
| 338 | |a nicht spezifiziert |b zu |2 rdacarrier | ||
| 520 | |a A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. | ||
| 520 | |a A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. | ||
| 650 | 7 | |a Robinosn instability |2 Elsevier | |
| 650 | 7 | |a Superconducting RF |2 Elsevier | |
| 650 | 7 | |a Low-level RF |2 Elsevier | |
| 700 | 1 | |a Wang, Chaoen |4 oth | |
| 700 | 1 | |a Chang, Lung-Hai |4 oth | |
| 700 | 1 | |a Yeh, Meng-Shu |4 oth | |
| 700 | 1 | |a Chang, Fu-Yu |4 oth | |
| 700 | 1 | |a Chang, Mei-Hsia |4 oth | |
| 700 | 1 | |a Chang, Shian-Wen |4 oth | |
| 700 | 1 | |a Chen, Ling-Jhen |4 oth | |
| 700 | 1 | |a Chung, Fu-Tsai |4 oth | |
| 700 | 1 | |a Lin, Ming-Chyuan |4 oth | |
| 700 | 1 | |a Lo, Chih-Hung |4 oth | |
| 700 | 1 | |a Yu, Tsung-Chi |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n North-Holland Publ. Co |a Ide, C.V. ELSEVIER |t The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol |d 2017 |d a journal on accelerators, instrumentation and techniques applied to research in nuclear and atomic physics, materials science and related fields in physics |g Amsterdam |w (DE-627)ELV000874671 |
| 773 | 1 | 8 | |g volume:894 |g year:2018 |g day:21 |g month:06 |g pages:57-71 |g extent:15 |
| 856 | 4 | 0 | |u https://doi.org/10.1016/j.nima.2018.03.046 |3 Volltext |
| 912 | |a GBV_USEFLAG_U | ||
| 912 | |a GBV_ELV | ||
| 912 | |a SYSFLAG_U | ||
| 912 | |a SSG-OLC-PHA | ||
| 936 | b | k | |a 44.90 |j Neurologie |q VZ |
| 951 | |a AR | ||
| 952 | |d 894 |j 2018 |b 21 |c 0621 |h 57-71 |g 15 | ||
| author_variant |
z k l zkl |
|---|---|
| matchkey_str |
liuzongkaiwangchaoenchanglunghaiyehmengs:2018----:oeighitrcinfhaiyemoddrcvtwtiso |
| hierarchy_sort_str |
2018transfer abstract |
| bklnumber |
44.90 |
| publishDate |
2018 |
| allfields |
10.1016/j.nima.2018.03.046 doi GBV00000000000496.pica (DE-627)ELV042784085 (ELSEVIER)S0168-9002(18)30395-4 DE-627 ger DE-627 rakwb eng 610 VZ 44.90 bkl Liu, Zong-Kai verfasserin aut Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops 2018transfer abstract 15 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. Robinosn instability Elsevier Superconducting RF Elsevier Low-level RF Elsevier Wang, Chaoen oth Chang, Lung-Hai oth Yeh, Meng-Shu oth Chang, Fu-Yu oth Chang, Mei-Hsia oth Chang, Shian-Wen oth Chen, Ling-Jhen oth Chung, Fu-Tsai oth Lin, Ming-Chyuan oth Lo, Chih-Hung oth Yu, Tsung-Chi oth Enthalten in North-Holland Publ. Co Ide, C.V. ELSEVIER The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol 2017 a journal on accelerators, instrumentation and techniques applied to research in nuclear and atomic physics, materials science and related fields in physics Amsterdam (DE-627)ELV000874671 volume:894 year:2018 day:21 month:06 pages:57-71 extent:15 https://doi.org/10.1016/j.nima.2018.03.046 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.90 Neurologie VZ AR 894 2018 21 0621 57-71 15 |
| spelling |
10.1016/j.nima.2018.03.046 doi GBV00000000000496.pica (DE-627)ELV042784085 (ELSEVIER)S0168-9002(18)30395-4 DE-627 ger DE-627 rakwb eng 610 VZ 44.90 bkl Liu, Zong-Kai verfasserin aut Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops 2018transfer abstract 15 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. Robinosn instability Elsevier Superconducting RF Elsevier Low-level RF Elsevier Wang, Chaoen oth Chang, Lung-Hai oth Yeh, Meng-Shu oth Chang, Fu-Yu oth Chang, Mei-Hsia oth Chang, Shian-Wen oth Chen, Ling-Jhen oth Chung, Fu-Tsai oth Lin, Ming-Chyuan oth Lo, Chih-Hung oth Yu, Tsung-Chi oth Enthalten in North-Holland Publ. Co Ide, C.V. ELSEVIER The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol 2017 a journal on accelerators, instrumentation and techniques applied to research in nuclear and atomic physics, materials science and related fields in physics Amsterdam (DE-627)ELV000874671 volume:894 year:2018 day:21 month:06 pages:57-71 extent:15 https://doi.org/10.1016/j.nima.2018.03.046 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.90 Neurologie VZ AR 894 2018 21 0621 57-71 15 |
| allfields_unstemmed |
10.1016/j.nima.2018.03.046 doi GBV00000000000496.pica (DE-627)ELV042784085 (ELSEVIER)S0168-9002(18)30395-4 DE-627 ger DE-627 rakwb eng 610 VZ 44.90 bkl Liu, Zong-Kai verfasserin aut Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops 2018transfer abstract 15 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. Robinosn instability Elsevier Superconducting RF Elsevier Low-level RF Elsevier Wang, Chaoen oth Chang, Lung-Hai oth Yeh, Meng-Shu oth Chang, Fu-Yu oth Chang, Mei-Hsia oth Chang, Shian-Wen oth Chen, Ling-Jhen oth Chung, Fu-Tsai oth Lin, Ming-Chyuan oth Lo, Chih-Hung oth Yu, Tsung-Chi oth Enthalten in North-Holland Publ. Co Ide, C.V. ELSEVIER The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol 2017 a journal on accelerators, instrumentation and techniques applied to research in nuclear and atomic physics, materials science and related fields in physics Amsterdam (DE-627)ELV000874671 volume:894 year:2018 day:21 month:06 pages:57-71 extent:15 https://doi.org/10.1016/j.nima.2018.03.046 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.90 Neurologie VZ AR 894 2018 21 0621 57-71 15 |
| allfieldsGer |
10.1016/j.nima.2018.03.046 doi GBV00000000000496.pica (DE-627)ELV042784085 (ELSEVIER)S0168-9002(18)30395-4 DE-627 ger DE-627 rakwb eng 610 VZ 44.90 bkl Liu, Zong-Kai verfasserin aut Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops 2018transfer abstract 15 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. Robinosn instability Elsevier Superconducting RF Elsevier Low-level RF Elsevier Wang, Chaoen oth Chang, Lung-Hai oth Yeh, Meng-Shu oth Chang, Fu-Yu oth Chang, Mei-Hsia oth Chang, Shian-Wen oth Chen, Ling-Jhen oth Chung, Fu-Tsai oth Lin, Ming-Chyuan oth Lo, Chih-Hung oth Yu, Tsung-Chi oth Enthalten in North-Holland Publ. Co Ide, C.V. ELSEVIER The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol 2017 a journal on accelerators, instrumentation and techniques applied to research in nuclear and atomic physics, materials science and related fields in physics Amsterdam (DE-627)ELV000874671 volume:894 year:2018 day:21 month:06 pages:57-71 extent:15 https://doi.org/10.1016/j.nima.2018.03.046 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.90 Neurologie VZ AR 894 2018 21 0621 57-71 15 |
| allfieldsSound |
10.1016/j.nima.2018.03.046 doi GBV00000000000496.pica (DE-627)ELV042784085 (ELSEVIER)S0168-9002(18)30395-4 DE-627 ger DE-627 rakwb eng 610 VZ 44.90 bkl Liu, Zong-Kai verfasserin aut Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops 2018transfer abstract 15 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. Robinosn instability Elsevier Superconducting RF Elsevier Low-level RF Elsevier Wang, Chaoen oth Chang, Lung-Hai oth Yeh, Meng-Shu oth Chang, Fu-Yu oth Chang, Mei-Hsia oth Chang, Shian-Wen oth Chen, Ling-Jhen oth Chung, Fu-Tsai oth Lin, Ming-Chyuan oth Lo, Chih-Hung oth Yu, Tsung-Chi oth Enthalten in North-Holland Publ. Co Ide, C.V. ELSEVIER The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol 2017 a journal on accelerators, instrumentation and techniques applied to research in nuclear and atomic physics, materials science and related fields in physics Amsterdam (DE-627)ELV000874671 volume:894 year:2018 day:21 month:06 pages:57-71 extent:15 https://doi.org/10.1016/j.nima.2018.03.046 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.90 Neurologie VZ AR 894 2018 21 0621 57-71 15 |
| language |
English |
| source |
Enthalten in The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol Amsterdam volume:894 year:2018 day:21 month:06 pages:57-71 extent:15 |
| sourceStr |
Enthalten in The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol Amsterdam volume:894 year:2018 day:21 month:06 pages:57-71 extent:15 |
| format_phy_str_mv |
Article |
| bklname |
Neurologie |
| institution |
findex.gbv.de |
| topic_facet |
Robinosn instability Superconducting RF Low-level RF |
| dewey-raw |
610 |
| isfreeaccess_bool |
false |
| container_title |
The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol |
| authorswithroles_txt_mv |
Liu, Zong-Kai @@aut@@ Wang, Chaoen @@oth@@ Chang, Lung-Hai @@oth@@ Yeh, Meng-Shu @@oth@@ Chang, Fu-Yu @@oth@@ Chang, Mei-Hsia @@oth@@ Chang, Shian-Wen @@oth@@ Chen, Ling-Jhen @@oth@@ Chung, Fu-Tsai @@oth@@ Lin, Ming-Chyuan @@oth@@ Lo, Chih-Hung @@oth@@ Yu, Tsung-Chi @@oth@@ |
| publishDateDaySort_date |
2018-01-21T00:00:00Z |
| hierarchy_top_id |
ELV000874671 |
| dewey-sort |
3610 |
| id |
ELV042784085 |
| language_de |
englisch |
| fullrecord |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">ELV042784085</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230626002256.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">180726s2018 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1016/j.nima.2018.03.046</subfield><subfield code="2">doi</subfield></datafield><datafield tag="028" ind1="5" ind2="2"><subfield code="a">GBV00000000000496.pica</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)ELV042784085</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(ELSEVIER)S0168-9002(18)30395-4</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">610</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">44.90</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Liu, Zong-Kai</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2018transfer abstract</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">15</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">z</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zu</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system.</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Robinosn instability</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Superconducting RF</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Low-level RF</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wang, Chaoen</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chang, Lung-Hai</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Yeh, Meng-Shu</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chang, Fu-Yu</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chang, Mei-Hsia</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chang, Shian-Wen</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chen, Ling-Jhen</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chung, Fu-Tsai</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Lin, Ming-Chyuan</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Lo, Chih-Hung</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Yu, Tsung-Chi</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="n">North-Holland Publ. Co</subfield><subfield code="a">Ide, C.V. ELSEVIER</subfield><subfield code="t">The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol</subfield><subfield code="d">2017</subfield><subfield code="d">a journal on accelerators, instrumentation and techniques applied to research in nuclear and atomic physics, materials science and related fields in physics</subfield><subfield code="g">Amsterdam</subfield><subfield code="w">(DE-627)ELV000874671</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:894</subfield><subfield code="g">year:2018</subfield><subfield code="g">day:21</subfield><subfield code="g">month:06</subfield><subfield code="g">pages:57-71</subfield><subfield code="g">extent:15</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1016/j.nima.2018.03.046</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ELV</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-PHA</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">44.90</subfield><subfield code="j">Neurologie</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">894</subfield><subfield code="j">2018</subfield><subfield code="b">21</subfield><subfield code="c">0621</subfield><subfield code="h">57-71</subfield><subfield code="g">15</subfield></datafield></record></collection>
|
| author |
Liu, Zong-Kai |
| spellingShingle |
Liu, Zong-Kai ddc 610 bkl 44.90 Elsevier Robinosn instability Elsevier Superconducting RF Elsevier Low-level RF Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops |
| authorStr |
Liu, Zong-Kai |
| ppnlink_with_tag_str_mv |
@@773@@(DE-627)ELV000874671 |
| format |
electronic Article |
| dewey-ones |
610 - Medicine & health |
| delete_txt_mv |
keep |
| author_role |
aut |
| collection |
elsevier |
| remote_str |
true |
| illustrated |
Not Illustrated |
| topic_title |
610 VZ 44.90 bkl Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops Robinosn instability Elsevier Superconducting RF Elsevier Low-level RF Elsevier |
| topic |
ddc 610 bkl 44.90 Elsevier Robinosn instability Elsevier Superconducting RF Elsevier Low-level RF |
| topic_unstemmed |
ddc 610 bkl 44.90 Elsevier Robinosn instability Elsevier Superconducting RF Elsevier Low-level RF |
| topic_browse |
ddc 610 bkl 44.90 Elsevier Robinosn instability Elsevier Superconducting RF Elsevier Low-level RF |
| format_facet |
Elektronische Aufsätze Aufsätze Elektronische Ressource |
| format_main_str_mv |
Text Zeitschrift/Artikel |
| carriertype_str_mv |
zu |
| author2_variant |
c w cw l h c lhc m s y msy f y c fyc m h c mhc s w c swc l j c ljc f t c ftc m c l mcl c h l chl t c y tcy |
| hierarchy_parent_title |
The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol |
| hierarchy_parent_id |
ELV000874671 |
| dewey-tens |
610 - Medicine & health |
| hierarchy_top_title |
The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol |
| isfreeaccess_txt |
false |
| familylinks_str_mv |
(DE-627)ELV000874671 |
| title |
Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops |
| ctrlnum |
(DE-627)ELV042784085 (ELSEVIER)S0168-9002(18)30395-4 |
| title_full |
Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops |
| author_sort |
Liu, Zong-Kai |
| journal |
The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol |
| journalStr |
The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol |
| lang_code |
eng |
| isOA_bool |
false |
| dewey-hundreds |
600 - Technology |
| recordtype |
marc |
| publishDateSort |
2018 |
| contenttype_str_mv |
zzz |
| container_start_page |
57 |
| author_browse |
Liu, Zong-Kai |
| container_volume |
894 |
| physical |
15 |
| class |
610 VZ 44.90 bkl |
| format_se |
Elektronische Aufsätze |
| author-letter |
Liu, Zong-Kai |
| doi_str_mv |
10.1016/j.nima.2018.03.046 |
| dewey-full |
610 |
| title_sort |
modeling the interaction of a heavily beam loaded srf cavity with its low-level rf feedback loops |
| title_auth |
Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops |
| abstract |
A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. |
| abstractGer |
A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. |
| abstract_unstemmed |
A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system. |
| collection_details |
GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA |
| title_short |
Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops |
| url |
https://doi.org/10.1016/j.nima.2018.03.046 |
| remote_bool |
true |
| author2 |
Wang, Chaoen Chang, Lung-Hai Yeh, Meng-Shu Chang, Fu-Yu Chang, Mei-Hsia Chang, Shian-Wen Chen, Ling-Jhen Chung, Fu-Tsai Lin, Ming-Chyuan Lo, Chih-Hung Yu, Tsung-Chi |
| author2Str |
Wang, Chaoen Chang, Lung-Hai Yeh, Meng-Shu Chang, Fu-Yu Chang, Mei-Hsia Chang, Shian-Wen Chen, Ling-Jhen Chung, Fu-Tsai Lin, Ming-Chyuan Lo, Chih-Hung Yu, Tsung-Chi |
| ppnlink |
ELV000874671 |
| mediatype_str_mv |
z |
| isOA_txt |
false |
| hochschulschrift_bool |
false |
| author2_role |
oth oth oth oth oth oth oth oth oth oth oth |
| doi_str |
10.1016/j.nima.2018.03.046 |
| up_date |
2024-07-06T17:05:14.716Z |
| _version_ |
1803850103879892992 |
| fullrecord_marcxml |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">ELV042784085</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230626002256.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">180726s2018 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1016/j.nima.2018.03.046</subfield><subfield code="2">doi</subfield></datafield><datafield tag="028" ind1="5" ind2="2"><subfield code="a">GBV00000000000496.pica</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)ELV042784085</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(ELSEVIER)S0168-9002(18)30395-4</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">610</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">44.90</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Liu, Zong-Kai</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Modeling the interaction of a heavily beam loaded SRF cavity with its low-level RF feedback loops</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2018transfer abstract</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">15</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">z</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zu</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">A superconducting radio frequency (SRF) cavity provides superior stability to power high intensity light sources and can suppress coupled-bunch instabilities due to its smaller impedance for higher order modes. Because of these features, SRF cavities are commonly used for modern light sources, such as the TLS, CLS, DLS, SSRF, PLS-II, TPS, and NSLS-II, with an aggressive approach to operate the light sources at high beam currents. However, operating a SRF cavity at high beam currents may result with unacceptable stability problems of the low level RF (LLRF) system, due to drifts of the cavity resonant frequency caused by unexpected perturbations from the environment. As the feedback loop gets out of control, the cavity voltage may start to oscillate with a current-dependent characteristic frequency. Such situations can cause beam abort due to the activation of the interlock protection system, i.e. false alarm of quench detection. This malfunction of the light source reduces the reliability of SRF operation. Understanding this unstable mechanism to prevent its appearance becomes a primary task in the pursuit of highly reliable SRF operation. In this paper, a Pedersen model, including the response of the LLRF system, was used to simulate the beam-cavity interaction of a SRF cavity under heavy beam loading. Causes for the onset of instability at high beam current will be discussed as well as remedies to assure the design of a stable LLRF system.</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Robinosn instability</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Superconducting RF</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Low-level RF</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wang, Chaoen</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chang, Lung-Hai</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Yeh, Meng-Shu</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chang, Fu-Yu</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chang, Mei-Hsia</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chang, Shian-Wen</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chen, Ling-Jhen</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Chung, Fu-Tsai</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Lin, Ming-Chyuan</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Lo, Chih-Hung</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Yu, Tsung-Chi</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="n">North-Holland Publ. Co</subfield><subfield code="a">Ide, C.V. ELSEVIER</subfield><subfield code="t">The efficacy of EEG-biofeedback for acute pain management, a randomized sham-controlled study of a tailored protocol</subfield><subfield code="d">2017</subfield><subfield code="d">a journal on accelerators, instrumentation and techniques applied to research in nuclear and atomic physics, materials science and related fields in physics</subfield><subfield code="g">Amsterdam</subfield><subfield code="w">(DE-627)ELV000874671</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:894</subfield><subfield code="g">year:2018</subfield><subfield code="g">day:21</subfield><subfield code="g">month:06</subfield><subfield code="g">pages:57-71</subfield><subfield code="g">extent:15</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1016/j.nima.2018.03.046</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ELV</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-PHA</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">44.90</subfield><subfield code="j">Neurologie</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">894</subfield><subfield code="j">2018</subfield><subfield code="b">21</subfield><subfield code="c">0621</subfield><subfield code="h">57-71</subfield><subfield code="g">15</subfield></datafield></record></collection>
|
| score |
7.398183 |