60920.pdf
Nuclear fusion is a promising candidate to supply energy for future generations. At the high temperatures needed for the nuclei to fuse, ions and electrons are no longer bound into atoms. Magnetic fields confine the resulting plasma. One of the heating methods is the ion cyclotron resonant absorptio...
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oapen-20.500.12657-493212021-11-23T13:48:51Z Chapter A test facility to investigate sheath effects during ion cyclotron resonance heating Crombé, Kristel Ochoukov, R. Nikiforov, Anton Shesterikov, I. Van Eester, Dirk Faugel, Helmut Jacquot, Jonathan Faudot, Eric D’ Inca, Rodolphe Heuraux, Stéphane Usoltceva, M. Kostic, A. Fuenfgelder, H. Noterdaeme, Jean-Marie Louche, Fabrice plasma, helicon, radio frequency, sheaths, diagnostics bic Book Industry Communication::P Mathematics & science::PH Physics Nuclear fusion is a promising candidate to supply energy for future generations. At the high temperatures needed for the nuclei to fuse, ions and electrons are no longer bound into atoms. Magnetic fields confine the resulting plasma. One of the heating methods is the ion cyclotron resonant absorption of waves emitted by an external Ion Cyclotron Radio Frequency (ICRF) antenna. The efficiency of ICRF heating is strongly affected by rectified RF electric fields at antenna and other in-vessel components (so-called ‘sheath effects’). The chapter presents an overview of ICRF principles. Attention is given to characterising the detrimental sheath effects through experiments on a dedicated test facility (IShTAR: Ion cyclotron Sheath Test ARrangement). IShTAR has a linear magnetic configuration and is equipped with an independent helicon plasma source. The configuration and capabilities of the test-bed and its diagnostics are described, as well as an analysis of the plasmas. 2021-06-02T10:12:08Z 2021-06-02T10:12:08Z 2019 chapter ONIX_20210602_10.5772/intechopen.76730_435 https://library.oapen.org/handle/20.500.12657/49321 eng application/pdf n/a 60920.pdf InTechOpen 10.5772/intechopen.76730 10.5772/intechopen.76730 09f6769d-48ed-467d-b150-4cf2680656a1 EURATOM-Adhoc-2014-20 633053 open access |
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English |
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Nuclear fusion is a promising candidate to supply energy for future generations. At the high temperatures needed for the nuclei to fuse, ions and electrons are no longer bound into atoms. Magnetic fields confine the resulting plasma. One of the heating methods is the ion cyclotron resonant absorption of waves emitted by an external Ion Cyclotron Radio Frequency (ICRF) antenna. The efficiency of ICRF heating is strongly affected by rectified RF electric fields at antenna and other in-vessel components (so-called ‘sheath effects’). The chapter presents an overview of ICRF principles. Attention is given to characterising the detrimental sheath effects through experiments on a dedicated test facility (IShTAR: Ion cyclotron Sheath Test ARrangement). IShTAR has a linear magnetic configuration and is equipped with an independent helicon plasma source. The configuration and capabilities of the test-bed and its diagnostics are described, as well as an analysis of the plasmas. |
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