Beam plasma ion source for neutral beams

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1982

OSTI ID:5964679

Rosing, M G

The beam-plasma is investigated as an ion source for neutral beams. Two theories are presented, one using an assumed non-Maxwellian electron distribution and one using a measured electron distribution. The experiment is described and the diagnostic equipment is analyzed. The 4921 A line of helium was measured using a Fabry-Perot interferometer. The electron energy distribution was measured for various cases of beam voltage, ion extraction voltage, and neutral pressure. The conclusion is that the Child-Langmuir Law is not a limiting factor for this ion source, and the assumed electron distribution theory agrees with the data. The ion temperature was found to be 0.14 eV and there were no problems extracting ions in a magnetic field. The low temperature indicates that the beam plasma is a good source of ions for low divergence neutral beams.

• Research Organization: Wisconsin Univ., Madison (USA)
• OSTI ID: 5964679
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430301 -- Particle Accelerators-- Ion Sources
640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM EXTRACTION
BEAM-PLASMA SYSTEMS
ELECTRON SPECTRA
ENERGY SPECTRA
ION SOURCES
NEUTRAL BEAM SOURCES
PERFORMANCE
SPECTRA