Ion-extraction performance of the circular magnetic-multipole bucket ion source applied for the neutral beam injection system of the Heliotron E machine

Journal Article · Sat Jan 01 00:00:00 EST 1983 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1137212· OSTI ID:6597933

Sano, F; Obiki, T; Sasaki, A; Iiyoshi, A; Uo, K

The ion-beam extraction performance of the 30-kV--35-A circular magnetic-multipole bucket ion source applied for the neutral beam injection system of the Heliotron E fusion machine has been investigated with special reference to ion-beam optics. By using the numerical simulation code for the cylindrical ion-extraction system, the computational beam-divergence angles have been compared with the experimental data. The experiments show that the applied three-electrode beam optics are satisfactorily stable against source-plasma variation and that the minimum beam-divergence angle is less than 1.15 deg. The obtained optimal perveance of the ion source is nearly 6.3 x 10/sup -6/ (A/V/sup 3/2/), and the experimental optics behavior is in reasonable agreement with the numerical prediction. On the basis of the experiments, the effect of the edge angle of the first beam-forming, high-potential electrode is also discussed. The experiment suggests that the obtuse angle (approx.73/sup 0/) for that edge is preferable to the acute angle (approx.30/sup 0/).

• Research Organization: Plasma Physics Laboratory, Kyoto University, Gokasho, Uji, Japan
• OSTI ID: 6597933
• Journal Information: Rev. Sci. Instrum.; (United States), Vol. 54:1
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ION SOURCES
COMPARATIVE EVALUATIONS
PERFORMANCE
AMP BEAM CURRENTS
BEAM INJECTION
BEAM NEUTRALIZATION
BEAM OPTICS
CIRCULAR CONFIGURATION
COMPUTER CODES
COMPUTERIZED SIMULATION
CYLINDRICAL CONFIGURATION
HELIOTRON
KEV RANGE
MAGNETIC FIELDS
MATHEMATICAL MODELS
MULTIPOLAR CONFIGURATIONS
THERMONUCLEAR DEVICES
BEAM CURRENTS
CLOSED CONFIGURATIONS
CLOSED PLASMA DEVICES
CONFIGURATION
CURRENTS
ENERGY RANGE
MAGNETIC FIELD CONFIGURATIONS
SIMULATION
640301* - Atomic
Molecular & Chemical Physics- Beams & their Reactions