Proposed high voltage power supply for the ITER relevant lower hybrid current drive system |
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| Authors: | PK Sharma F Kazarian P Garibaldi T Gassman JF Artaud YS Bae J Belo G Berger-By JM Bernard Ph Cara A Cardinali C Castaldo S Ceccuzzi R Cesario J Decker L Delpech A Ekedahl J Garcia M Goniche D Guilhem Q Zeng |
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| Affiliation: | 1. Institute for Plasma Research, Bhat, Gandhinagar, Gujarat, India;2. ITER Organization, CS 90 046, 13067 Saint-Paul-Les-Durance, France;3. National Fusion Research Institute, Daejeon, Republic of Korea;4. Associaçao Euratom-IST, Centro de Fusao Nuclear, Lisboa, Portugal;5. Associazione Euratom-ENEA sulla Fusione, CR Frascati, Rome, Italy;6. Institute of Plasma Physics, CAS, Hefei, Anhui, China;7. Politecnico di Torino, Dipartimento di Elettronica, Torino, Italy;8. Roma Tre University, Rome, Italy;9. Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, Republic of Korea;10. CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France |
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| Abstract: | In the framework of the EFDA task HCD-08-03-01, the ITER lower hybrid current drive (LHCD) system design has been reviewed. The system aims to generate 24 MW of RF power at 5 GHz, of which 20 MW would be coupled to the plasmas. The present state of the art does not allow envisaging a unitary output of the klystrons exceeding 500 kW, so the project is based on 48 klystron units, leaving some margin when the transmission lines losses are taken into account. A high voltage power supply (HVPS), required to operate the klystrons, is proposed. A single HVPS would be used to feed and operate four klystrons in parallel configuration. Based on the above considerations, it is proposed to design and develop twelve HVPS, based on pulse step modulator (PSM) technology, each rated for 90 kV/90 A. This paper describes in details, the typical electrical requirements and the conceptual design of the proposed HVPS for the ITER LHCD system. |
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