Development of a strongly focusing high-intensity He(+) ion source for a confined alpha particle measurement at ITER.
A strongly focusing high-intensity He(+) ion source has been designed and constructed as a beam source for a high-energy He(0) beam probe system for diagnosis of fusion produced alpha particles in the thermonuclear fusion plasmas. The He(+) beam was extracted from the ion source at an acceleration voltage of 18-35 kV. Temperature distributions of the beam target were observed with an IR camera. The 1/e-holding beam profile half-width was about 15 mm at optimum perveance (Perv) of 0.03 (I(beam)=2.4 A). A beam current about 3 A was achieved at an acceleration voltage of 26.7 kV with an arc power of 10 kW (Perv=0.023).
Kisaki
M
M
School of Engineering, Tohoku University, Sendai, Japan. masashi.kisaki@ppl2.qse.tohoku.ac.jp
Shinto
K
K
Kobuchi
T
T
Okamoto
A
A
Kitajima
S
S
Sasao
M
M
Tsumori
K
K
Nishiura
M
M
Kaneko
O
O
Matsuda
Y
Y
Wada
M
M
Sakakita
H
H
Kiyama
S
S
Hirano
Y
Y