Speaker
Liu He
(NBI Group)
Description
The condition of 1MW-NBI heating for toroidal experiments to increase plasma energy storage and help making H-mode discharge had been well examined on HL-2A tokomak. A new tokomak with larger size and higher parameters named HL-2M tokomak which is under construction in Southwestern Institute of Physics of China needs higher auxiliary heating power, so a new NBI beamline with maximum 5MW injection power is designed. Since the Mid-2011 to the end of 2015, after a large number of numerical simulation, structure optimization and final factory manufacturing, most of the components including vacuum chamber, deflecting magnet, calorimeter, ion dumps etc and some sub-system have already been processed and assembled.
Compared with the 1MW-NB injector on HL-2A tokomak, the size of 5MW-NB injector significantly increased. The specific performance is as follows: The total weight is nearly 50 ton, the total height is more than 11m, and the vacuum volume is around 20m33. The 5MW-NB injector employs four positive bucket arc-driven sources with designed discharge parameters of filament current 2100A and arc current 1000A and could, in principle, inject 5MW D beam at 80keV particle energy or 3MW H beam at 60keV particle energy in 5 seconds pulse duration. Refer to vacuum pumping system, a cryopump system with pumping speed more than 1.4×1066L/s is designed for the injector to maintain high vacuum degree. In order to test and improve ion sources, a ion source test bed was built and some experimental results were got. Presently the H ion beam power has been up to 66kV×26A and D ion beam power up to 66kV×20A.
Co-authors
Cao Jianyong
(NBI Group, Auxiliary Heating Division (104 Division), Center for Fusion Science of Southwestern Institute of Physics, Chengdu, Sichuan, China)
Liu He
(NBI Group, Auxiliary Heating Division (104 Division), Center for Fusion Science of Southwestern Institute of Physics, Chengdu, Sichuan, China)
Wei Huiling
(NBI Group, Auxiliary Heating Division (104 Division), Center for Fusion Science of Southwestern Institute of Physics, Chengdu, Sichuan, China)
Yang Xianfu
(NBI Group, Auxiliary Heating Division (104 Division), Center for Fusion Science of Southwestern Institute of Physics, Chengdu, Sichuan, China)
Zhang Xianming
(NBI Group, Auxiliary Heating Division (104 Division), Center for Fusion Science of Southwestern Institute of Physics, Chengdu, Sichuan, China)
Zou Guiqing
(NBI Group, Auxiliary Heating Division (104 Division), Center for Fusion Science of Southwestern Institute of Physics, Chengdu, Sichuan, China)
