Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration
Abstract Blob and hole dynamics is investigated in the sheared rotating plasma column of a simple magnetised torus using two-dimensional time-averaged measurements and conditional averaging analysis. Experiments are performed in open field line configuration by adding a vertical magnetic field compo...
Ausführliche Beschreibung
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| Autor*in: |
Alex, P [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2024 |
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| Schlagwörter: |
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| Anmerkung: |
© Indian Academy of Sciences 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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| Übergeordnetes Werk: |
Enthalten in: Pramāna - Bangalore : Indian Inst. of Science, 1973, 98(2024), 1 vom: 28. Jan. |
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| Übergeordnetes Werk: |
volume:98 ; year:2024 ; number:1 ; day:28 ; month:01 |
| Links: |
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| DOI / URN: |
10.1007/s12043-023-02696-w |
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| Katalog-ID: |
SPR054553164 |
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| 520 | |a Abstract Blob and hole dynamics is investigated in the sheared rotating plasma column of a simple magnetised torus using two-dimensional time-averaged measurements and conditional averaging analysis. Experiments are performed in open field line configuration by adding a vertical magnetic field component to the toroidal one, resulting in a quasistationary equilibrium characterised by vertically elongated profiles. The combined effect of plasma rotation with the vertical field leads to a poloidally asymmetric sheared E%$\times %$B flow in the electron diamagnetic direction, pointing downward and upward in the low and high field side of the midplane, respectively, on both sides of the shear layer. Statistical analysis indicates that density fluctuations are dominated by non-Gaussian positive intermittent blob events in the low-density edge region, and negative hole events in the core plasma, whereas the intermediate shear layer corresponds to the blob birth zone featuring Gaussian statistics. Conditional averaging analysis reveals that, in the course of its propagation, a blob breaks off from a structure elongated in the direction of the flow due to the differential stretching in the vicinity of the shear layer. Blobs are convected out of the potential contour and ejected by the fluctuating field to the limiter, while holes stay inside and propagate back into the main plasma. Blobs move poloidally with velocities up to 3.7 km%$/%$s and radially up to 2.6 km%$/%$s. These observations confirm the picture where persistent structures provide a means for a net convection of the charged particles to the limiter, across the magnetic field and beyond the edge region of the magnetised plasmas. | ||
| 650 | 4 | |a Magnetic confinement |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a blob transport |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a turbulence and instabilities |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a low temperature plasmas |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a electrostatic probes |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Barni, R |4 aut | |
| 700 | 1 | |a Roman, H E |4 aut | |
| 700 | 1 | |a Riccardi, C |4 aut | |
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10.1007/s12043-023-02696-w doi (DE-627)SPR054553164 (SPR)s12043-023-02696-w-e DE-627 ger DE-627 rakwb eng Alex, P verfasserin (orcid)0000-0001-8191-4573 aut Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Indian Academy of Sciences 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Blob and hole dynamics is investigated in the sheared rotating plasma column of a simple magnetised torus using two-dimensional time-averaged measurements and conditional averaging analysis. Experiments are performed in open field line configuration by adding a vertical magnetic field component to the toroidal one, resulting in a quasistationary equilibrium characterised by vertically elongated profiles. The combined effect of plasma rotation with the vertical field leads to a poloidally asymmetric sheared E%$\times %$B flow in the electron diamagnetic direction, pointing downward and upward in the low and high field side of the midplane, respectively, on both sides of the shear layer. Statistical analysis indicates that density fluctuations are dominated by non-Gaussian positive intermittent blob events in the low-density edge region, and negative hole events in the core plasma, whereas the intermediate shear layer corresponds to the blob birth zone featuring Gaussian statistics. Conditional averaging analysis reveals that, in the course of its propagation, a blob breaks off from a structure elongated in the direction of the flow due to the differential stretching in the vicinity of the shear layer. Blobs are convected out of the potential contour and ejected by the fluctuating field to the limiter, while holes stay inside and propagate back into the main plasma. Blobs move poloidally with velocities up to 3.7 km%$/%$s and radially up to 2.6 km%$/%$s. These observations confirm the picture where persistent structures provide a means for a net convection of the charged particles to the limiter, across the magnetic field and beyond the edge region of the magnetised plasmas. Magnetic confinement (dpeaa)DE-He213 blob transport (dpeaa)DE-He213 turbulence and instabilities (dpeaa)DE-He213 low temperature plasmas (dpeaa)DE-He213 electrostatic probes (dpeaa)DE-He213 Barni, R aut Roman, H E aut Riccardi, C aut Enthalten in Pramāna Bangalore : Indian Inst. of Science, 1973 98(2024), 1 vom: 28. Jan. (DE-627)328820806 (DE-600)2046354-6 0973-7111 nnns volume:98 year:2024 number:1 day:28 month:01 https://dx.doi.org/10.1007/s12043-023-02696-w lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 98 2024 1 28 01 |
| spelling |
10.1007/s12043-023-02696-w doi (DE-627)SPR054553164 (SPR)s12043-023-02696-w-e DE-627 ger DE-627 rakwb eng Alex, P verfasserin (orcid)0000-0001-8191-4573 aut Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Indian Academy of Sciences 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Blob and hole dynamics is investigated in the sheared rotating plasma column of a simple magnetised torus using two-dimensional time-averaged measurements and conditional averaging analysis. Experiments are performed in open field line configuration by adding a vertical magnetic field component to the toroidal one, resulting in a quasistationary equilibrium characterised by vertically elongated profiles. The combined effect of plasma rotation with the vertical field leads to a poloidally asymmetric sheared E%$\times %$B flow in the electron diamagnetic direction, pointing downward and upward in the low and high field side of the midplane, respectively, on both sides of the shear layer. Statistical analysis indicates that density fluctuations are dominated by non-Gaussian positive intermittent blob events in the low-density edge region, and negative hole events in the core plasma, whereas the intermediate shear layer corresponds to the blob birth zone featuring Gaussian statistics. Conditional averaging analysis reveals that, in the course of its propagation, a blob breaks off from a structure elongated in the direction of the flow due to the differential stretching in the vicinity of the shear layer. Blobs are convected out of the potential contour and ejected by the fluctuating field to the limiter, while holes stay inside and propagate back into the main plasma. Blobs move poloidally with velocities up to 3.7 km%$/%$s and radially up to 2.6 km%$/%$s. These observations confirm the picture where persistent structures provide a means for a net convection of the charged particles to the limiter, across the magnetic field and beyond the edge region of the magnetised plasmas. Magnetic confinement (dpeaa)DE-He213 blob transport (dpeaa)DE-He213 turbulence and instabilities (dpeaa)DE-He213 low temperature plasmas (dpeaa)DE-He213 electrostatic probes (dpeaa)DE-He213 Barni, R aut Roman, H E aut Riccardi, C aut Enthalten in Pramāna Bangalore : Indian Inst. of Science, 1973 98(2024), 1 vom: 28. Jan. (DE-627)328820806 (DE-600)2046354-6 0973-7111 nnns volume:98 year:2024 number:1 day:28 month:01 https://dx.doi.org/10.1007/s12043-023-02696-w lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 98 2024 1 28 01 |
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10.1007/s12043-023-02696-w doi (DE-627)SPR054553164 (SPR)s12043-023-02696-w-e DE-627 ger DE-627 rakwb eng Alex, P verfasserin (orcid)0000-0001-8191-4573 aut Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Indian Academy of Sciences 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Blob and hole dynamics is investigated in the sheared rotating plasma column of a simple magnetised torus using two-dimensional time-averaged measurements and conditional averaging analysis. Experiments are performed in open field line configuration by adding a vertical magnetic field component to the toroidal one, resulting in a quasistationary equilibrium characterised by vertically elongated profiles. The combined effect of plasma rotation with the vertical field leads to a poloidally asymmetric sheared E%$\times %$B flow in the electron diamagnetic direction, pointing downward and upward in the low and high field side of the midplane, respectively, on both sides of the shear layer. Statistical analysis indicates that density fluctuations are dominated by non-Gaussian positive intermittent blob events in the low-density edge region, and negative hole events in the core plasma, whereas the intermediate shear layer corresponds to the blob birth zone featuring Gaussian statistics. Conditional averaging analysis reveals that, in the course of its propagation, a blob breaks off from a structure elongated in the direction of the flow due to the differential stretching in the vicinity of the shear layer. Blobs are convected out of the potential contour and ejected by the fluctuating field to the limiter, while holes stay inside and propagate back into the main plasma. Blobs move poloidally with velocities up to 3.7 km%$/%$s and radially up to 2.6 km%$/%$s. These observations confirm the picture where persistent structures provide a means for a net convection of the charged particles to the limiter, across the magnetic field and beyond the edge region of the magnetised plasmas. Magnetic confinement (dpeaa)DE-He213 blob transport (dpeaa)DE-He213 turbulence and instabilities (dpeaa)DE-He213 low temperature plasmas (dpeaa)DE-He213 electrostatic probes (dpeaa)DE-He213 Barni, R aut Roman, H E aut Riccardi, C aut Enthalten in Pramāna Bangalore : Indian Inst. of Science, 1973 98(2024), 1 vom: 28. Jan. (DE-627)328820806 (DE-600)2046354-6 0973-7111 nnns volume:98 year:2024 number:1 day:28 month:01 https://dx.doi.org/10.1007/s12043-023-02696-w lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 98 2024 1 28 01 |
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10.1007/s12043-023-02696-w doi (DE-627)SPR054553164 (SPR)s12043-023-02696-w-e DE-627 ger DE-627 rakwb eng Alex, P verfasserin (orcid)0000-0001-8191-4573 aut Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Indian Academy of Sciences 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Blob and hole dynamics is investigated in the sheared rotating plasma column of a simple magnetised torus using two-dimensional time-averaged measurements and conditional averaging analysis. Experiments are performed in open field line configuration by adding a vertical magnetic field component to the toroidal one, resulting in a quasistationary equilibrium characterised by vertically elongated profiles. The combined effect of plasma rotation with the vertical field leads to a poloidally asymmetric sheared E%$\times %$B flow in the electron diamagnetic direction, pointing downward and upward in the low and high field side of the midplane, respectively, on both sides of the shear layer. Statistical analysis indicates that density fluctuations are dominated by non-Gaussian positive intermittent blob events in the low-density edge region, and negative hole events in the core plasma, whereas the intermediate shear layer corresponds to the blob birth zone featuring Gaussian statistics. Conditional averaging analysis reveals that, in the course of its propagation, a blob breaks off from a structure elongated in the direction of the flow due to the differential stretching in the vicinity of the shear layer. Blobs are convected out of the potential contour and ejected by the fluctuating field to the limiter, while holes stay inside and propagate back into the main plasma. Blobs move poloidally with velocities up to 3.7 km%$/%$s and radially up to 2.6 km%$/%$s. These observations confirm the picture where persistent structures provide a means for a net convection of the charged particles to the limiter, across the magnetic field and beyond the edge region of the magnetised plasmas. Magnetic confinement (dpeaa)DE-He213 blob transport (dpeaa)DE-He213 turbulence and instabilities (dpeaa)DE-He213 low temperature plasmas (dpeaa)DE-He213 electrostatic probes (dpeaa)DE-He213 Barni, R aut Roman, H E aut Riccardi, C aut Enthalten in Pramāna Bangalore : Indian Inst. of Science, 1973 98(2024), 1 vom: 28. Jan. (DE-627)328820806 (DE-600)2046354-6 0973-7111 nnns volume:98 year:2024 number:1 day:28 month:01 https://dx.doi.org/10.1007/s12043-023-02696-w lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 98 2024 1 28 01 |
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10.1007/s12043-023-02696-w doi (DE-627)SPR054553164 (SPR)s12043-023-02696-w-e DE-627 ger DE-627 rakwb eng Alex, P verfasserin (orcid)0000-0001-8191-4573 aut Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Indian Academy of Sciences 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Blob and hole dynamics is investigated in the sheared rotating plasma column of a simple magnetised torus using two-dimensional time-averaged measurements and conditional averaging analysis. Experiments are performed in open field line configuration by adding a vertical magnetic field component to the toroidal one, resulting in a quasistationary equilibrium characterised by vertically elongated profiles. The combined effect of plasma rotation with the vertical field leads to a poloidally asymmetric sheared E%$\times %$B flow in the electron diamagnetic direction, pointing downward and upward in the low and high field side of the midplane, respectively, on both sides of the shear layer. Statistical analysis indicates that density fluctuations are dominated by non-Gaussian positive intermittent blob events in the low-density edge region, and negative hole events in the core plasma, whereas the intermediate shear layer corresponds to the blob birth zone featuring Gaussian statistics. Conditional averaging analysis reveals that, in the course of its propagation, a blob breaks off from a structure elongated in the direction of the flow due to the differential stretching in the vicinity of the shear layer. Blobs are convected out of the potential contour and ejected by the fluctuating field to the limiter, while holes stay inside and propagate back into the main plasma. Blobs move poloidally with velocities up to 3.7 km%$/%$s and radially up to 2.6 km%$/%$s. These observations confirm the picture where persistent structures provide a means for a net convection of the charged particles to the limiter, across the magnetic field and beyond the edge region of the magnetised plasmas. Magnetic confinement (dpeaa)DE-He213 blob transport (dpeaa)DE-He213 turbulence and instabilities (dpeaa)DE-He213 low temperature plasmas (dpeaa)DE-He213 electrostatic probes (dpeaa)DE-He213 Barni, R aut Roman, H E aut Riccardi, C aut Enthalten in Pramāna Bangalore : Indian Inst. of Science, 1973 98(2024), 1 vom: 28. Jan. (DE-627)328820806 (DE-600)2046354-6 0973-7111 nnns volume:98 year:2024 number:1 day:28 month:01 https://dx.doi.org/10.1007/s12043-023-02696-w lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 98 2024 1 28 01 |
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Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Blob and hole dynamics is investigated in the sheared rotating plasma column of a simple magnetised torus using two-dimensional time-averaged measurements and conditional averaging analysis. Experiments are performed in open field line configuration by adding a vertical magnetic field component to the toroidal one, resulting in a quasistationary equilibrium characterised by vertically elongated profiles. The combined effect of plasma rotation with the vertical field leads to a poloidally asymmetric sheared E%$\times %$B flow in the electron diamagnetic direction, pointing downward and upward in the low and high field side of the midplane, respectively, on both sides of the shear layer. Statistical analysis indicates that density fluctuations are dominated by non-Gaussian positive intermittent blob events in the low-density edge region, and negative hole events in the core plasma, whereas the intermediate shear layer corresponds to the blob birth zone featuring Gaussian statistics. Conditional averaging analysis reveals that, in the course of its propagation, a blob breaks off from a structure elongated in the direction of the flow due to the differential stretching in the vicinity of the shear layer. Blobs are convected out of the potential contour and ejected by the fluctuating field to the limiter, while holes stay inside and propagate back into the main plasma. Blobs move poloidally with velocities up to 3.7 km%$/%$s and radially up to 2.6 km%$/%$s. These observations confirm the picture where persistent structures provide a means for a net convection of the charged particles to the limiter, across the magnetic field and beyond the edge region of the magnetised plasmas.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Magnetic confinement</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">blob transport</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">turbulence and instabilities</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">low temperature plasmas</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">electrostatic probes</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Barni, R</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Roman, H E</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Riccardi, C</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Pramāna</subfield><subfield code="d">Bangalore : Indian Inst. of Science, 1973</subfield><subfield code="g">98(2024), 1 vom: 28. 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Alex, P |
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Alex, P misc Magnetic confinement misc blob transport misc turbulence and instabilities misc low temperature plasmas misc electrostatic probes Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration |
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Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration Magnetic confinement (dpeaa)DE-He213 blob transport (dpeaa)DE-He213 turbulence and instabilities (dpeaa)DE-He213 low temperature plasmas (dpeaa)DE-He213 electrostatic probes (dpeaa)DE-He213 |
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misc Magnetic confinement misc blob transport misc turbulence and instabilities misc low temperature plasmas misc electrostatic probes |
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misc Magnetic confinement misc blob transport misc turbulence and instabilities misc low temperature plasmas misc electrostatic probes |
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Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration |
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Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration |
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Alex, P Barni, R Roman, H E Riccardi, C |
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blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration |
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Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration |
| abstract |
Abstract Blob and hole dynamics is investigated in the sheared rotating plasma column of a simple magnetised torus using two-dimensional time-averaged measurements and conditional averaging analysis. Experiments are performed in open field line configuration by adding a vertical magnetic field component to the toroidal one, resulting in a quasistationary equilibrium characterised by vertically elongated profiles. The combined effect of plasma rotation with the vertical field leads to a poloidally asymmetric sheared E%$\times %$B flow in the electron diamagnetic direction, pointing downward and upward in the low and high field side of the midplane, respectively, on both sides of the shear layer. Statistical analysis indicates that density fluctuations are dominated by non-Gaussian positive intermittent blob events in the low-density edge region, and negative hole events in the core plasma, whereas the intermediate shear layer corresponds to the blob birth zone featuring Gaussian statistics. Conditional averaging analysis reveals that, in the course of its propagation, a blob breaks off from a structure elongated in the direction of the flow due to the differential stretching in the vicinity of the shear layer. Blobs are convected out of the potential contour and ejected by the fluctuating field to the limiter, while holes stay inside and propagate back into the main plasma. Blobs move poloidally with velocities up to 3.7 km%$/%$s and radially up to 2.6 km%$/%$s. These observations confirm the picture where persistent structures provide a means for a net convection of the charged particles to the limiter, across the magnetic field and beyond the edge region of the magnetised plasmas. © Indian Academy of Sciences 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
| abstractGer |
Abstract Blob and hole dynamics is investigated in the sheared rotating plasma column of a simple magnetised torus using two-dimensional time-averaged measurements and conditional averaging analysis. Experiments are performed in open field line configuration by adding a vertical magnetic field component to the toroidal one, resulting in a quasistationary equilibrium characterised by vertically elongated profiles. The combined effect of plasma rotation with the vertical field leads to a poloidally asymmetric sheared E%$\times %$B flow in the electron diamagnetic direction, pointing downward and upward in the low and high field side of the midplane, respectively, on both sides of the shear layer. Statistical analysis indicates that density fluctuations are dominated by non-Gaussian positive intermittent blob events in the low-density edge region, and negative hole events in the core plasma, whereas the intermediate shear layer corresponds to the blob birth zone featuring Gaussian statistics. Conditional averaging analysis reveals that, in the course of its propagation, a blob breaks off from a structure elongated in the direction of the flow due to the differential stretching in the vicinity of the shear layer. Blobs are convected out of the potential contour and ejected by the fluctuating field to the limiter, while holes stay inside and propagate back into the main plasma. Blobs move poloidally with velocities up to 3.7 km%$/%$s and radially up to 2.6 km%$/%$s. These observations confirm the picture where persistent structures provide a means for a net convection of the charged particles to the limiter, across the magnetic field and beyond the edge region of the magnetised plasmas. © Indian Academy of Sciences 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
| abstract_unstemmed |
Abstract Blob and hole dynamics is investigated in the sheared rotating plasma column of a simple magnetised torus using two-dimensional time-averaged measurements and conditional averaging analysis. Experiments are performed in open field line configuration by adding a vertical magnetic field component to the toroidal one, resulting in a quasistationary equilibrium characterised by vertically elongated profiles. The combined effect of plasma rotation with the vertical field leads to a poloidally asymmetric sheared E%$\times %$B flow in the electron diamagnetic direction, pointing downward and upward in the low and high field side of the midplane, respectively, on both sides of the shear layer. Statistical analysis indicates that density fluctuations are dominated by non-Gaussian positive intermittent blob events in the low-density edge region, and negative hole events in the core plasma, whereas the intermediate shear layer corresponds to the blob birth zone featuring Gaussian statistics. Conditional averaging analysis reveals that, in the course of its propagation, a blob breaks off from a structure elongated in the direction of the flow due to the differential stretching in the vicinity of the shear layer. Blobs are convected out of the potential contour and ejected by the fluctuating field to the limiter, while holes stay inside and propagate back into the main plasma. Blobs move poloidally with velocities up to 3.7 km%$/%$s and radially up to 2.6 km%$/%$s. These observations confirm the picture where persistent structures provide a means for a net convection of the charged particles to the limiter, across the magnetic field and beyond the edge region of the magnetised plasmas. © Indian Academy of Sciences 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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Blob and hole dynamics in the rotating plasma column of a simple magnetised torus in open field line configuration |
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https://dx.doi.org/10.1007/s12043-023-02696-w |
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Barni, R Roman, H E Riccardi, C |
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10.1007/s12043-023-02696-w |
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2024-07-04T02:09:24.088Z |
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| score |
7.3998823 |