Electromagnetic simulations of JET ICRF ITER-like antenna with TOPICA and SSWICH asymptotic codes
Multi-megawatt Ion Cyclotron Range of Frequencies (ICRF) heating is routinely used in the JET tokamak. To increase the ICRF heating power available from the A2 antennas, the ICRF ITER-Like Antenna (ILA) was reinstalled for the 2015 JET ITER-like wall experimental campaign. The application of high le...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2017-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201715703026 |
| _version_ | 1818654909919133696 |
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| author | Křivská Alena Bobkov Volodymyr Colas Laurent Dumortier Pierre Durodié Frédéric Lerche Ernesto Jacquet Philippe Jacquot Jonathan Klepper Christopher Milanesio Daniele |
| author_facet | Křivská Alena Bobkov Volodymyr Colas Laurent Dumortier Pierre Durodié Frédéric Lerche Ernesto Jacquet Philippe Jacquot Jonathan Klepper Christopher Milanesio Daniele |
| author_sort | Křivská Alena |
| collection | DOAJ |
| description | Multi-megawatt Ion Cyclotron Range of Frequencies (ICRF) heating is routinely used in the JET tokamak. To increase the ICRF heating power available from the A2 antennas, the ICRF ITER-Like Antenna (ILA) was reinstalled for the 2015 JET ITER-like wall experimental campaign. The application of high levels of ICRF power typically results in increased plasma wall interaction which leads to the observation of enhanced influx of metallic impurities in the plasma edge. It is assumed that the impurity production is mainly driven by the parallel component of the Radio-Frequency (RF) antenna electric near-field, E// (parallel to the confinement magnetic field of the tokamak), that is rectified in a thin boundary layer (RF sheath). Torino Polytechnic Ion Cyclotron Antenna (TOPICA) code was used to compute E// field maps in front of the ILA and between its poloidal limiters in the presence of plasma using measured density profiles and various antenna feedings. E// field maps calculated between the poloidal limiters were used to estimate the poloidal distribution of RF-sheath Direct Current (DC) potential in this private region of the ILA and make relative comparison of various antenna electrical settings. For this purpose we used the asymptotic version of the Self-consistent Sheaths and Waves for Ion Cyclotron Heating Slow-Wave (SSWICH-SW) code. These estimations can help to study the formation of RF sheaths around the antenna and even at distant locations (∼3m away). |
| first_indexed | 2024-12-17T03:01:17Z |
| format | Article |
| id | doaj.art-92ac711e7eb5477ea46bdb7810d0e48d |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-17T03:01:17Z |
| publishDate | 2017-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-92ac711e7eb5477ea46bdb7810d0e48d2022-12-21T22:06:05ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011570302610.1051/epjconf/201715703026epjconf_rfppc2017_03026Electromagnetic simulations of JET ICRF ITER-like antenna with TOPICA and SSWICH asymptotic codesKřivská AlenaBobkov VolodymyrColas LaurentDumortier PierreDurodié FrédéricLerche ErnestoJacquet PhilippeJacquot JonathanKlepper ChristopherMilanesio DanieleMulti-megawatt Ion Cyclotron Range of Frequencies (ICRF) heating is routinely used in the JET tokamak. To increase the ICRF heating power available from the A2 antennas, the ICRF ITER-Like Antenna (ILA) was reinstalled for the 2015 JET ITER-like wall experimental campaign. The application of high levels of ICRF power typically results in increased plasma wall interaction which leads to the observation of enhanced influx of metallic impurities in the plasma edge. It is assumed that the impurity production is mainly driven by the parallel component of the Radio-Frequency (RF) antenna electric near-field, E// (parallel to the confinement magnetic field of the tokamak), that is rectified in a thin boundary layer (RF sheath). Torino Polytechnic Ion Cyclotron Antenna (TOPICA) code was used to compute E// field maps in front of the ILA and between its poloidal limiters in the presence of plasma using measured density profiles and various antenna feedings. E// field maps calculated between the poloidal limiters were used to estimate the poloidal distribution of RF-sheath Direct Current (DC) potential in this private region of the ILA and make relative comparison of various antenna electrical settings. For this purpose we used the asymptotic version of the Self-consistent Sheaths and Waves for Ion Cyclotron Heating Slow-Wave (SSWICH-SW) code. These estimations can help to study the formation of RF sheaths around the antenna and even at distant locations (∼3m away).https://doi.org/10.1051/epjconf/201715703026 |
| spellingShingle | Křivská Alena Bobkov Volodymyr Colas Laurent Dumortier Pierre Durodié Frédéric Lerche Ernesto Jacquet Philippe Jacquot Jonathan Klepper Christopher Milanesio Daniele Electromagnetic simulations of JET ICRF ITER-like antenna with TOPICA and SSWICH asymptotic codes EPJ Web of Conferences |
| title | Electromagnetic simulations of JET ICRF ITER-like antenna with TOPICA and SSWICH asymptotic codes |
| title_full | Electromagnetic simulations of JET ICRF ITER-like antenna with TOPICA and SSWICH asymptotic codes |
| title_fullStr | Electromagnetic simulations of JET ICRF ITER-like antenna with TOPICA and SSWICH asymptotic codes |
| title_full_unstemmed | Electromagnetic simulations of JET ICRF ITER-like antenna with TOPICA and SSWICH asymptotic codes |
| title_short | Electromagnetic simulations of JET ICRF ITER-like antenna with TOPICA and SSWICH asymptotic codes |
| title_sort | electromagnetic simulations of jet icrf iter like antenna with topica and sswich asymptotic codes |
| url | https://doi.org/10.1051/epjconf/201715703026 |
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