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Originalveröffentlichung
DOI: 10.1088/0741-3335/45/12A/011
Scopus
Zitationen: 61
Web of Science
Zitationen: 47

MW gyrotron development for fusion plasma applications

Thumm, Manfred

Abstract:
Gyrotrons are microwave oscillators based on the Electron Cyclotron Maser (ECM) instability. The free energy is the rotational energy of weakly relativistic electrons (1 < γ ≤ 1.2) in a longitudinal magnetic cavity field. In contrast to klystrons the interaction circuit is a high-order-mode cavity allowing higher power at higher frequencies. At present, gyrotrons are mainly used as high power microwave sources for various applications in tokamak and stellarator plasmas for controlled thermonuclear fusion research. Long-pulse (a few sec) gyrotrons utilizing open-ended cylindrical resonators which generate output powers of 100-960 kW per unit, at frequencies between 8 and 140 GHz, have been used very successfully for plasma formation, electron cyclotron resonance heating (ECRH), noninductive electron cyclotron (ECCD) and lower hybrid current drive (LHCD), plasma stability control and active plasma diagnostics at system power levels up to 4.5 MW. As fusion machines become larger and operate at higher magnetic fields (B≅6T) and higher plasma densities in steady state, it is necessary to develop CW gyrotrons that operate at both highe ... mehr


Zugehörige Institution(en) am KIT Institut für Höchstfrequenztechnik und Elektronik (IHE)
Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Publikationstyp Zeitschriftenaufsatz
Jahr 2003
Sprache Englisch
Identifikator ISSN: 0032-1028, 0368-3281, 0741-3335, 1361-6587, 1879-2979
KITopen ID: 1000001328
HGF-Programm 31.04.03; LK 01
Erschienen in Plasma physics and controlled fusion
Band 45
Seiten A143-A161
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