Improving the Quality of $ CaWO_{4} $ Target Crystals for CRESST
Abstract The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO$$_4$$ target crystal. The CaWO$$_4$$ crystal is operated together with a light detector...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Kinast, A. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s) 2022 |
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| Übergeordnetes Werk: |
Enthalten in: Journal of low temperature physics - Springer US, 1969, 209(2022), 5-6 vom: 24. Mai, Seite 1128-1134 |
|---|---|
| Übergeordnetes Werk: |
volume:209 ; year:2022 ; number:5-6 ; day:24 ; month:05 ; pages:1128-1134 |
| Links: |
|---|
| DOI / URN: |
10.1007/s10909-022-02743-7 |
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| Katalog-ID: |
OLC208008707X |
|---|
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| 520 | |a Abstract The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO$$_4$$ target crystal. The CaWO$$_4$$ crystal is operated together with a light detector at mK temperature and read out by a Transition Edge Sensor. For many years, CaWO$$_4$$ crystals have successfully been produced in-house at Technical University of Munich (TUM) with a focus on high radiopurity which is crucial to reduce background originating from radioactive contamination. In order to further improve the CaWO$$_4$$ crystals, an extensive chemical purification of the raw materials and the synthesised CaWO$$_4$$ powder has been performed. In addition, a temperature gradient simulation of the growth process and subsequently an optimisation of the growth furnace with the goal to reduce the intrinsic stress was carried out. We present results on the intrinsic stress in the CaWO$$_4$$ crystals and on the CaWO$$_4$$ powder radiopurity. A crystal grown from the purified material was installed in the current CRESST set-up. The detector is equipped with an instrumented holder which is used to measure the alpha decay rate of the crystal. We present a preliminary analysis showing a significantly reduced intrinsic background from natural decay chains. | ||
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| 650 | 4 | |a Crystal growth | |
| 650 | 4 | |a Radiopurity | |
| 700 | 1 | |a Angloher, G. |4 aut | |
| 700 | 1 | |a Benato, G. |4 aut | |
| 700 | 1 | |a Bento, A. |4 aut | |
| 700 | 1 | |a Bertolini, A. |4 aut | |
| 700 | 1 | |a Breier, R. |4 aut | |
| 700 | 1 | |a Bucci, C. |4 aut | |
| 700 | 1 | |a Canonica, L. |4 aut | |
| 700 | 1 | |a D’Addabbo, A. |4 aut | |
| 700 | 1 | |a Lorenzo, S. Di |4 aut | |
| 700 | 1 | |a Einfalt, L. |4 aut | |
| 700 | 1 | |a Erb, A. |4 aut | |
| 700 | 1 | |a Feilitzsch, F. V. |4 aut | |
| 700 | 1 | |a Iachellini, N. Ferreiro |4 aut | |
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| 700 | 1 | |a Hamilton, F. |4 aut | |
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| 700 | 1 | |a Ješkovský, M. |4 aut | |
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| 700 | 1 | |a Mancuso, M. |4 aut | |
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| 700 | 1 | |a Mokina, V. |4 aut | |
| 700 | 1 | |a Nilima, A. |4 aut | |
| 700 | 1 | |a Olmi, M. |4 aut | |
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| 700 | 1 | |a Pattavina, L. |4 aut | |
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| 700 | 1 | |a Potzel, W. |4 aut | |
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| 700 | 1 | |a Pröbst, F. |4 aut | |
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| 700 | 1 | |a Reindl, F. |4 aut | |
| 700 | 1 | |a Rothe, J. |4 aut | |
| 700 | 1 | |a Schäffner, K. |4 aut | |
| 700 | 1 | |a Schieck, J. |4 aut | |
| 700 | 1 | |a Schmiedmayer, D. |4 aut | |
| 700 | 1 | |a Schönert, S. |4 aut | |
| 700 | 1 | |a Schwertner, C. |4 aut | |
| 700 | 1 | |a Stahlberg, M. |4 aut | |
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10.1007/s10909-022-02743-7 doi (DE-627)OLC208008707X (DE-He213)s10909-022-02743-7-p DE-627 ger DE-627 rakwb eng 530 VZ Kinast, A. verfasserin (orcid)0000-0002-5894-2303 aut Improving the Quality of $ CaWO_{4} $ Target Crystals for CRESST 2022 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2022 Abstract The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO$$_4$$ target crystal. The CaWO$$_4$$ crystal is operated together with a light detector at mK temperature and read out by a Transition Edge Sensor. For many years, CaWO$$_4$$ crystals have successfully been produced in-house at Technical University of Munich (TUM) with a focus on high radiopurity which is crucial to reduce background originating from radioactive contamination. In order to further improve the CaWO$$_4$$ crystals, an extensive chemical purification of the raw materials and the synthesised CaWO$$_4$$ powder has been performed. In addition, a temperature gradient simulation of the growth process and subsequently an optimisation of the growth furnace with the goal to reduce the intrinsic stress was carried out. We present results on the intrinsic stress in the CaWO$$_4$$ crystals and on the CaWO$$_4$$ powder radiopurity. A crystal grown from the purified material was installed in the current CRESST set-up. The detector is equipped with an instrumented holder which is used to measure the alpha decay rate of the crystal. We present a preliminary analysis showing a significantly reduced intrinsic background from natural decay chains. CRESST CaWO Crystal growth Radiopurity Angloher, G. aut Benato, G. aut Bento, A. aut Bertolini, A. aut Breier, R. aut Bucci, C. aut Canonica, L. aut D’Addabbo, A. aut Lorenzo, S. Di aut Einfalt, L. aut Erb, A. aut Feilitzsch, F. V. aut Iachellini, N. Ferreiro aut Fichtinger, S. aut Fuchs, D. aut Fuss, A. aut Garai, A. aut Ghete, V.-M. aut Gorla, P. aut Gupta, S. aut Hamilton, F. aut Hauff, D. aut Ješkovský, M. aut Jochum, J. aut Kaznacheeva, M. aut Kluck, H. aut Kraus, H. aut Langenkämper, A. aut Mancuso, M. aut Marini, L. aut Mokina, V. aut Nilima, A. aut Olmi, M. aut Ortmann, T. aut Pagliarone, C. aut Palušová, V. aut Pattavina, L. aut Petricca, F. aut Potzel, W. aut Povinec, P. aut Pröbst, F. aut Pucci, F. aut Reindl, F. aut Rothe, J. aut Schäffner, K. aut Schieck, J. aut Schmiedmayer, D. aut Schönert, S. aut Schwertner, C. aut Stahlberg, M. aut Stodolsky, L. aut Strandhagen, C. aut Strauss, R. aut Usherov, I. aut Wagner, F. aut Willers, M. aut Zema, V. aut Enthalten in Journal of low temperature physics Springer US, 1969 209(2022), 5-6 vom: 24. Mai, Seite 1128-1134 (DE-627)129546267 (DE-600)218311-0 (DE-576)014996642 0022-2291 nnns volume:209 year:2022 number:5-6 day:24 month:05 pages:1128-1134 https://doi.org/10.1007/s10909-022-02743-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_4126 AR 209 2022 5-6 24 05 1128-1134 |
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10.1007/s10909-022-02743-7 doi (DE-627)OLC208008707X (DE-He213)s10909-022-02743-7-p DE-627 ger DE-627 rakwb eng 530 VZ Kinast, A. verfasserin (orcid)0000-0002-5894-2303 aut Improving the Quality of $ CaWO_{4} $ Target Crystals for CRESST 2022 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2022 Abstract The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO$$_4$$ target crystal. The CaWO$$_4$$ crystal is operated together with a light detector at mK temperature and read out by a Transition Edge Sensor. For many years, CaWO$$_4$$ crystals have successfully been produced in-house at Technical University of Munich (TUM) with a focus on high radiopurity which is crucial to reduce background originating from radioactive contamination. In order to further improve the CaWO$$_4$$ crystals, an extensive chemical purification of the raw materials and the synthesised CaWO$$_4$$ powder has been performed. In addition, a temperature gradient simulation of the growth process and subsequently an optimisation of the growth furnace with the goal to reduce the intrinsic stress was carried out. We present results on the intrinsic stress in the CaWO$$_4$$ crystals and on the CaWO$$_4$$ powder radiopurity. A crystal grown from the purified material was installed in the current CRESST set-up. The detector is equipped with an instrumented holder which is used to measure the alpha decay rate of the crystal. We present a preliminary analysis showing a significantly reduced intrinsic background from natural decay chains. CRESST CaWO Crystal growth Radiopurity Angloher, G. aut Benato, G. aut Bento, A. aut Bertolini, A. aut Breier, R. aut Bucci, C. aut Canonica, L. aut D’Addabbo, A. aut Lorenzo, S. Di aut Einfalt, L. aut Erb, A. aut Feilitzsch, F. V. aut Iachellini, N. Ferreiro aut Fichtinger, S. aut Fuchs, D. aut Fuss, A. aut Garai, A. aut Ghete, V.-M. aut Gorla, P. aut Gupta, S. aut Hamilton, F. aut Hauff, D. aut Ješkovský, M. aut Jochum, J. aut Kaznacheeva, M. aut Kluck, H. aut Kraus, H. aut Langenkämper, A. aut Mancuso, M. aut Marini, L. aut Mokina, V. aut Nilima, A. aut Olmi, M. aut Ortmann, T. aut Pagliarone, C. aut Palušová, V. aut Pattavina, L. aut Petricca, F. aut Potzel, W. aut Povinec, P. aut Pröbst, F. aut Pucci, F. aut Reindl, F. aut Rothe, J. aut Schäffner, K. aut Schieck, J. aut Schmiedmayer, D. aut Schönert, S. aut Schwertner, C. aut Stahlberg, M. aut Stodolsky, L. aut Strandhagen, C. aut Strauss, R. aut Usherov, I. aut Wagner, F. aut Willers, M. aut Zema, V. aut Enthalten in Journal of low temperature physics Springer US, 1969 209(2022), 5-6 vom: 24. Mai, Seite 1128-1134 (DE-627)129546267 (DE-600)218311-0 (DE-576)014996642 0022-2291 nnns volume:209 year:2022 number:5-6 day:24 month:05 pages:1128-1134 https://doi.org/10.1007/s10909-022-02743-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_4126 AR 209 2022 5-6 24 05 1128-1134 |
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10.1007/s10909-022-02743-7 doi (DE-627)OLC208008707X (DE-He213)s10909-022-02743-7-p DE-627 ger DE-627 rakwb eng 530 VZ Kinast, A. verfasserin (orcid)0000-0002-5894-2303 aut Improving the Quality of $ CaWO_{4} $ Target Crystals for CRESST 2022 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2022 Abstract The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO$$_4$$ target crystal. The CaWO$$_4$$ crystal is operated together with a light detector at mK temperature and read out by a Transition Edge Sensor. For many years, CaWO$$_4$$ crystals have successfully been produced in-house at Technical University of Munich (TUM) with a focus on high radiopurity which is crucial to reduce background originating from radioactive contamination. In order to further improve the CaWO$$_4$$ crystals, an extensive chemical purification of the raw materials and the synthesised CaWO$$_4$$ powder has been performed. In addition, a temperature gradient simulation of the growth process and subsequently an optimisation of the growth furnace with the goal to reduce the intrinsic stress was carried out. We present results on the intrinsic stress in the CaWO$$_4$$ crystals and on the CaWO$$_4$$ powder radiopurity. A crystal grown from the purified material was installed in the current CRESST set-up. The detector is equipped with an instrumented holder which is used to measure the alpha decay rate of the crystal. We present a preliminary analysis showing a significantly reduced intrinsic background from natural decay chains. CRESST CaWO Crystal growth Radiopurity Angloher, G. aut Benato, G. aut Bento, A. aut Bertolini, A. aut Breier, R. aut Bucci, C. aut Canonica, L. aut D’Addabbo, A. aut Lorenzo, S. Di aut Einfalt, L. aut Erb, A. aut Feilitzsch, F. V. aut Iachellini, N. Ferreiro aut Fichtinger, S. aut Fuchs, D. aut Fuss, A. aut Garai, A. aut Ghete, V.-M. aut Gorla, P. aut Gupta, S. aut Hamilton, F. aut Hauff, D. aut Ješkovský, M. aut Jochum, J. aut Kaznacheeva, M. aut Kluck, H. aut Kraus, H. aut Langenkämper, A. aut Mancuso, M. aut Marini, L. aut Mokina, V. aut Nilima, A. aut Olmi, M. aut Ortmann, T. aut Pagliarone, C. aut Palušová, V. aut Pattavina, L. aut Petricca, F. aut Potzel, W. aut Povinec, P. aut Pröbst, F. aut Pucci, F. aut Reindl, F. aut Rothe, J. aut Schäffner, K. aut Schieck, J. aut Schmiedmayer, D. aut Schönert, S. aut Schwertner, C. aut Stahlberg, M. aut Stodolsky, L. aut Strandhagen, C. aut Strauss, R. aut Usherov, I. aut Wagner, F. aut Willers, M. aut Zema, V. aut Enthalten in Journal of low temperature physics Springer US, 1969 209(2022), 5-6 vom: 24. Mai, Seite 1128-1134 (DE-627)129546267 (DE-600)218311-0 (DE-576)014996642 0022-2291 nnns volume:209 year:2022 number:5-6 day:24 month:05 pages:1128-1134 https://doi.org/10.1007/s10909-022-02743-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_4126 AR 209 2022 5-6 24 05 1128-1134 |
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10.1007/s10909-022-02743-7 doi (DE-627)OLC208008707X (DE-He213)s10909-022-02743-7-p DE-627 ger DE-627 rakwb eng 530 VZ Kinast, A. verfasserin (orcid)0000-0002-5894-2303 aut Improving the Quality of $ CaWO_{4} $ Target Crystals for CRESST 2022 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2022 Abstract The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO$$_4$$ target crystal. The CaWO$$_4$$ crystal is operated together with a light detector at mK temperature and read out by a Transition Edge Sensor. For many years, CaWO$$_4$$ crystals have successfully been produced in-house at Technical University of Munich (TUM) with a focus on high radiopurity which is crucial to reduce background originating from radioactive contamination. In order to further improve the CaWO$$_4$$ crystals, an extensive chemical purification of the raw materials and the synthesised CaWO$$_4$$ powder has been performed. In addition, a temperature gradient simulation of the growth process and subsequently an optimisation of the growth furnace with the goal to reduce the intrinsic stress was carried out. We present results on the intrinsic stress in the CaWO$$_4$$ crystals and on the CaWO$$_4$$ powder radiopurity. A crystal grown from the purified material was installed in the current CRESST set-up. The detector is equipped with an instrumented holder which is used to measure the alpha decay rate of the crystal. We present a preliminary analysis showing a significantly reduced intrinsic background from natural decay chains. CRESST CaWO Crystal growth Radiopurity Angloher, G. aut Benato, G. aut Bento, A. aut Bertolini, A. aut Breier, R. aut Bucci, C. aut Canonica, L. aut D’Addabbo, A. aut Lorenzo, S. Di aut Einfalt, L. aut Erb, A. aut Feilitzsch, F. V. aut Iachellini, N. Ferreiro aut Fichtinger, S. aut Fuchs, D. aut Fuss, A. aut Garai, A. aut Ghete, V.-M. aut Gorla, P. aut Gupta, S. aut Hamilton, F. aut Hauff, D. aut Ješkovský, M. aut Jochum, J. aut Kaznacheeva, M. aut Kluck, H. aut Kraus, H. aut Langenkämper, A. aut Mancuso, M. aut Marini, L. aut Mokina, V. aut Nilima, A. aut Olmi, M. aut Ortmann, T. aut Pagliarone, C. aut Palušová, V. aut Pattavina, L. aut Petricca, F. aut Potzel, W. aut Povinec, P. aut Pröbst, F. aut Pucci, F. aut Reindl, F. aut Rothe, J. aut Schäffner, K. aut Schieck, J. aut Schmiedmayer, D. aut Schönert, S. aut Schwertner, C. aut Stahlberg, M. aut Stodolsky, L. aut Strandhagen, C. aut Strauss, R. aut Usherov, I. aut Wagner, F. aut Willers, M. aut Zema, V. aut Enthalten in Journal of low temperature physics Springer US, 1969 209(2022), 5-6 vom: 24. Mai, Seite 1128-1134 (DE-627)129546267 (DE-600)218311-0 (DE-576)014996642 0022-2291 nnns volume:209 year:2022 number:5-6 day:24 month:05 pages:1128-1134 https://doi.org/10.1007/s10909-022-02743-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_4126 AR 209 2022 5-6 24 05 1128-1134 |
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10.1007/s10909-022-02743-7 doi (DE-627)OLC208008707X (DE-He213)s10909-022-02743-7-p DE-627 ger DE-627 rakwb eng 530 VZ Kinast, A. verfasserin (orcid)0000-0002-5894-2303 aut Improving the Quality of $ CaWO_{4} $ Target Crystals for CRESST 2022 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2022 Abstract The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO$$_4$$ target crystal. The CaWO$$_4$$ crystal is operated together with a light detector at mK temperature and read out by a Transition Edge Sensor. For many years, CaWO$$_4$$ crystals have successfully been produced in-house at Technical University of Munich (TUM) with a focus on high radiopurity which is crucial to reduce background originating from radioactive contamination. In order to further improve the CaWO$$_4$$ crystals, an extensive chemical purification of the raw materials and the synthesised CaWO$$_4$$ powder has been performed. In addition, a temperature gradient simulation of the growth process and subsequently an optimisation of the growth furnace with the goal to reduce the intrinsic stress was carried out. We present results on the intrinsic stress in the CaWO$$_4$$ crystals and on the CaWO$$_4$$ powder radiopurity. A crystal grown from the purified material was installed in the current CRESST set-up. The detector is equipped with an instrumented holder which is used to measure the alpha decay rate of the crystal. We present a preliminary analysis showing a significantly reduced intrinsic background from natural decay chains. CRESST CaWO Crystal growth Radiopurity Angloher, G. aut Benato, G. aut Bento, A. aut Bertolini, A. aut Breier, R. aut Bucci, C. aut Canonica, L. aut D’Addabbo, A. aut Lorenzo, S. Di aut Einfalt, L. aut Erb, A. aut Feilitzsch, F. V. aut Iachellini, N. Ferreiro aut Fichtinger, S. aut Fuchs, D. aut Fuss, A. aut Garai, A. aut Ghete, V.-M. aut Gorla, P. aut Gupta, S. aut Hamilton, F. aut Hauff, D. aut Ješkovský, M. aut Jochum, J. aut Kaznacheeva, M. aut Kluck, H. aut Kraus, H. aut Langenkämper, A. aut Mancuso, M. aut Marini, L. aut Mokina, V. aut Nilima, A. aut Olmi, M. aut Ortmann, T. aut Pagliarone, C. aut Palušová, V. aut Pattavina, L. aut Petricca, F. aut Potzel, W. aut Povinec, P. aut Pröbst, F. aut Pucci, F. aut Reindl, F. aut Rothe, J. aut Schäffner, K. aut Schieck, J. aut Schmiedmayer, D. aut Schönert, S. aut Schwertner, C. aut Stahlberg, M. aut Stodolsky, L. aut Strandhagen, C. aut Strauss, R. aut Usherov, I. aut Wagner, F. aut Willers, M. aut Zema, V. aut Enthalten in Journal of low temperature physics Springer US, 1969 209(2022), 5-6 vom: 24. Mai, Seite 1128-1134 (DE-627)129546267 (DE-600)218311-0 (DE-576)014996642 0022-2291 nnns volume:209 year:2022 number:5-6 day:24 month:05 pages:1128-1134 https://doi.org/10.1007/s10909-022-02743-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_4126 AR 209 2022 5-6 24 05 1128-1134 |
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Kinast, A. Angloher, G. Benato, G. Bento, A. Bertolini, A. Breier, R. Bucci, C. Canonica, L. D’Addabbo, A. Lorenzo, S. Di Einfalt, L. Erb, A. Feilitzsch, F. V. Iachellini, N. Ferreiro Fichtinger, S. Fuchs, D. Fuss, A. Garai, A. Ghete, V.-M. Gorla, P. Gupta, S. Hamilton, F. Hauff, D. Ješkovský, M. Jochum, J. Kaznacheeva, M. Kluck, H. Kraus, H. Langenkämper, A. Mancuso, M. Marini, L. Mokina, V. Nilima, A. Olmi, M. Ortmann, T. Pagliarone, C. Palušová, V. Pattavina, L. Petricca, F. Potzel, W. Povinec, P. Pröbst, F. Pucci, F. Reindl, F. Rothe, J. Schäffner, K. Schieck, J. Schmiedmayer, D. Schönert, S. Schwertner, C. Stahlberg, M. Stodolsky, L. Strandhagen, C. Strauss, R. Usherov, I. Wagner, F. Willers, M. Zema, V. |
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improving the quality of $ cawo_{4} $ target crystals for cresst |
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Improving the Quality of $ CaWO_{4} $ Target Crystals for CRESST |
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Abstract The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO$$_4$$ target crystal. The CaWO$$_4$$ crystal is operated together with a light detector at mK temperature and read out by a Transition Edge Sensor. For many years, CaWO$$_4$$ crystals have successfully been produced in-house at Technical University of Munich (TUM) with a focus on high radiopurity which is crucial to reduce background originating from radioactive contamination. In order to further improve the CaWO$$_4$$ crystals, an extensive chemical purification of the raw materials and the synthesised CaWO$$_4$$ powder has been performed. In addition, a temperature gradient simulation of the growth process and subsequently an optimisation of the growth furnace with the goal to reduce the intrinsic stress was carried out. We present results on the intrinsic stress in the CaWO$$_4$$ crystals and on the CaWO$$_4$$ powder radiopurity. A crystal grown from the purified material was installed in the current CRESST set-up. The detector is equipped with an instrumented holder which is used to measure the alpha decay rate of the crystal. We present a preliminary analysis showing a significantly reduced intrinsic background from natural decay chains. © The Author(s) 2022 |
| abstractGer |
Abstract The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO$$_4$$ target crystal. The CaWO$$_4$$ crystal is operated together with a light detector at mK temperature and read out by a Transition Edge Sensor. For many years, CaWO$$_4$$ crystals have successfully been produced in-house at Technical University of Munich (TUM) with a focus on high radiopurity which is crucial to reduce background originating from radioactive contamination. In order to further improve the CaWO$$_4$$ crystals, an extensive chemical purification of the raw materials and the synthesised CaWO$$_4$$ powder has been performed. In addition, a temperature gradient simulation of the growth process and subsequently an optimisation of the growth furnace with the goal to reduce the intrinsic stress was carried out. We present results on the intrinsic stress in the CaWO$$_4$$ crystals and on the CaWO$$_4$$ powder radiopurity. A crystal grown from the purified material was installed in the current CRESST set-up. The detector is equipped with an instrumented holder which is used to measure the alpha decay rate of the crystal. We present a preliminary analysis showing a significantly reduced intrinsic background from natural decay chains. © The Author(s) 2022 |
| abstract_unstemmed |
Abstract The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO$$_4$$ target crystal. The CaWO$$_4$$ crystal is operated together with a light detector at mK temperature and read out by a Transition Edge Sensor. For many years, CaWO$$_4$$ crystals have successfully been produced in-house at Technical University of Munich (TUM) with a focus on high radiopurity which is crucial to reduce background originating from radioactive contamination. In order to further improve the CaWO$$_4$$ crystals, an extensive chemical purification of the raw materials and the synthesised CaWO$$_4$$ powder has been performed. In addition, a temperature gradient simulation of the growth process and subsequently an optimisation of the growth furnace with the goal to reduce the intrinsic stress was carried out. We present results on the intrinsic stress in the CaWO$$_4$$ crystals and on the CaWO$$_4$$ powder radiopurity. A crystal grown from the purified material was installed in the current CRESST set-up. The detector is equipped with an instrumented holder which is used to measure the alpha decay rate of the crystal. We present a preliminary analysis showing a significantly reduced intrinsic background from natural decay chains. © The Author(s) 2022 |
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Improving the Quality of $ CaWO_{4} $ Target Crystals for CRESST |
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Angloher, G. Benato, G. Bento, A. Bertolini, A. Breier, R. Bucci, C. Canonica, L. D’Addabbo, A. Lorenzo, S. Di Einfalt, L. Erb, A. Feilitzsch, F. V. Iachellini, N. Ferreiro Fichtinger, S. Fuchs, D. Fuss, A. Garai, A. Ghete, V.-M. Gorla, P. Gupta, S. Hamilton, F. Hauff, D. Ješkovský, M. Jochum, J. Kaznacheeva, M. Kluck, H. Kraus, H. Langenkämper, A. Mancuso, M. Marini, L. Mokina, V. Nilima, A. Olmi, M. Ortmann, T. Pagliarone, C. Palušová, V. Pattavina, L. Petricca, F. Potzel, W. Povinec, P. Pröbst, F. Pucci, F. Reindl, F. Rothe, J. Schäffner, K. Schieck, J. Schmiedmayer, D. Schönert, S. Schwertner, C. Stahlberg, M. Stodolsky, L. Strandhagen, C. Strauss, R. Usherov, I. Wagner, F. Willers, M. Zema, V. |
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Angloher, G. Benato, G. Bento, A. Bertolini, A. Breier, R. Bucci, C. Canonica, L. D’Addabbo, A. Lorenzo, S. Di Einfalt, L. Erb, A. Feilitzsch, F. V. Iachellini, N. Ferreiro Fichtinger, S. Fuchs, D. Fuss, A. Garai, A. Ghete, V.-M. Gorla, P. Gupta, S. Hamilton, F. Hauff, D. Ješkovský, M. Jochum, J. Kaznacheeva, M. Kluck, H. Kraus, H. Langenkämper, A. Mancuso, M. Marini, L. Mokina, V. Nilima, A. Olmi, M. Ortmann, T. Pagliarone, C. Palušová, V. Pattavina, L. Petricca, F. Potzel, W. Povinec, P. Pröbst, F. Pucci, F. Reindl, F. Rothe, J. Schäffner, K. Schieck, J. Schmiedmayer, D. Schönert, S. Schwertner, C. Stahlberg, M. Stodolsky, L. Strandhagen, C. Strauss, R. Usherov, I. Wagner, F. Willers, M. Zema, V. |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">OLC208008707X</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230506093619.0</controlfield><controlfield tag="007">tu</controlfield><controlfield tag="008">230131s2022 xx ||||| 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/s10909-022-02743-7</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)OLC208008707X</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-He213)s10909-022-02743-7-p</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">530</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Kinast, A.</subfield><subfield code="e">verfasserin</subfield><subfield code="0">(orcid)0000-0002-5894-2303</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Improving the Quality of $ CaWO_{4} $ Target Crystals for CRESST</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2022</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">© The Author(s) 2022</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO$$_4$$ target crystal. The CaWO$$_4$$ crystal is operated together with a light detector at mK temperature and read out by a Transition Edge Sensor. For many years, CaWO$$_4$$ crystals have successfully been produced in-house at Technical University of Munich (TUM) with a focus on high radiopurity which is crucial to reduce background originating from radioactive contamination. In order to further improve the CaWO$$_4$$ crystals, an extensive chemical purification of the raw materials and the synthesised CaWO$$_4$$ powder has been performed. In addition, a temperature gradient simulation of the growth process and subsequently an optimisation of the growth furnace with the goal to reduce the intrinsic stress was carried out. We present results on the intrinsic stress in the CaWO$$_4$$ crystals and on the CaWO$$_4$$ powder radiopurity. A crystal grown from the purified material was installed in the current CRESST set-up. 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