Long pulse beam extraction with a prototype ion source for the KSTAR neutral beam system.
Long pulse operational characteristics of the high current ion source for the KSTAR neutral beam system are described. The beam pulse length of 300 s was successfully operated at a beam power of 1.6 MW with a beam energy of 70 keV. Beam energy, beam current, beam divergence, arc power, and several other operational parameters were measured during a pulse to analyze the long pulse properties. The increase of the cooling water temperature of the accelerator grids and plasma generator components were measured by water flow calorimetric system using thermocouples. The temperature rises of the filament electrodes of the ion source and the G1 grids (plasma grids) of the accelerator turned out to be the critical factors of the long pulse operation in the current system.
Oh
Byung-Hoon
BH
Korea Atomic Energy Research Institute, Daejeon, Korea.
Chang
Doo-Hee
DH
Jeong
Seung Ho
SH
Lee
Kwang-Won
KW
In
Sang-Ryul
SR
Yoon
Byung-Joo
BJ
Seo
Min-Seok
MS
Jin
Jung-Tae
JT
Kim
Bum-Ryul
BR
Chang
Dae-Sik
DS
Jung
Ki-Sok
KS
Kim
Jinchoon
J
Kim
Tae-Seong
TS
Bae
Young Soon
YS