Development and operation of JT-60 lhrf launchers
1991; Taylor & Francis; Volume: 1; Issue: 2 Linguagem: Inglês
10.1080/10519999108225536
ISSN1051-9998
AutoresY. Ikeda, T. Imai, Motoaki Seki, K. Sakamoto, Kuniaki Konishi, K. Kiyono, S. Maebara, T. Nagashima, O. Naito, M. Sawahata, Naotoshi Suganuma, Norio Suzuki, K. Uehara, K. Ushigusa, M. Yokokura,
Tópico(s)Particle accelerators and beam dynamics
ResumoAbstract The JT-60 LHRF launcher was designed with broad frequency capability (1.74 to 2.23 GHz) to inject multi-megawatt, multi-second RF waves into plasmas. The launcher is characterized by 32 long vacuum waveguides of ∼ 8 m without front windows to avoid plasma bombardment of the ceramic windows in the large tokamak. The front of the launcher is of a detachable grill so it can be changed easily to optimize the wave spectrum. Three types of grills have been developed, and one of them employs a multijunction technique to drive the plasma current efficiently. Three launchers have been installed on JT-60, and the total injection power has reached up to ∼ 10 MW. A good coupling of reflection coefficients, ∼20%, has been obtained for yarious plasma configurations. The development and operation of the LHRF launcher on JT-60 are described.
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