The 5.8 T Cryogen-Free Gyrotron Superconducting Magnet System on HL-2A

XIA Donghui (夏冬辉); HUANG Mei (黄梅); ZHOU Jun (周俊); et al.

doi:10.1088/1009-0630/16/4/20

Plasma Science and Technology > 2014 > 16(4): 410-414. > DOI: 10.1088/1009-0630/16/4/20

XIA Donghui (夏冬辉), HUANG Mei (黄梅), ZHOU Jun (周俊), et al.. The 5.8 T Cryogen-Free Gyrotron Superconducting Magnet System on HL-2A[J]. Plasma Science and Technology, 2014, 16(4): 410-414. DOI: 10.1088/1009-0630/16/4/20

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The 5.8 T Cryogen-Free Gyrotron Superconducting Magnet System on HL-2A

1 State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China 2 Southwestern Institute of Physics, Chengdu 610041, China

Funds: supported by the Intemational Thermonuclear Experimental Reactor Special Fund of China (No. 2009GB102001), Cooperation on Key Technology of Plasma Heating in Tokamak (No. 2010DFA63860) and Critical Technology Research of Nuclear Fusion and Physical Experiments and on HL-2A Tokamak (No. H660003)

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Received Date: January 14, 2013

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Abstract

Abstract

A 5.8 T cryogen-free superconducting magnet (SCM) system with a warm bore hole of 160 mm in diameter, used for gyrotrons operating in the frequency range from 68 GHz to 140 GHz, is installed on the site of the HL-2A tokamak. The SCM consists of two separate solenoidal magnetic coils connected in series, a 4.2 K Gifford-McMahon (GM) refrigerator, a com- pressor, a coil power supply and two temperature monitors. The performance, test and preliminary experimental results of this SCM system are described in this paper. The magnetic field distribu- tion was measured along the axis, and a dummy tube was used for adjusting the magnet system. Finally, the magnet was used for the operation of a 68 GHz/500 kW gyrotron, which is part of an electron cyclotron resonance heating (ECRH) system. With an additional auxiliary coil and after adjusting the magnet system, a maximum output power for the ECRH system of up to 400 kW was achieved.
- ECRH,
- gyrotron,
- superconducting magnet,
- cryogen free

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