High current negative ion beams

Conference · Sat Jan 01 04:00:00 EST 1977

OSTI ID:7324278

Prelec, K; Sluyters, T; Grossman, M

The development of an intense negative ion magnetron source, capable of extracting short pulsed negative ion beams of several hundred mA, was previously reported. For most particle accelerators these pulsed beams are more than adequate, but for efficient neutral injector systems in future fusion reactors, multi-ampere dc negative ion beams are required. In the past two years significant progress was made in the development of three direct extraction negative ion sources. The first source, the hollow discharge duoplasmatron (HDD), was extensively studied and optimized up to currents of 60 mA. With the second source, the magnetron, a beam current of almost one ampere has been obtained for more than ten milliseconds beam pulses. Several prototype Penning sources were constructed with yields similar as the magnetrons and with the expected advantage of higher gas efficiency. In order to improve knowledge of the origin of negative ion production, a program has started to measure the pertinent plasma parameters of the above mentioned sources by spectroscopic means and electrostatic probes. A first attempt was made to integrate a magnetron source in a 150 kV accelerator structure; so far, beams of 200 mA were accelerated up to 120 kV for several millisecond beam pulses.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: EY-76-C-02-0016
• OSTI ID: 7324278
• Report Number(s): BNL-22495; CONF-770313-81
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430301* -- Particle Accelerators-- Ion Sources
BEAM CURRENTS
CURRENTS
DUOPLASMATRONS
ELECTRON TUBES
ELECTRONIC EQUIPMENT
ION SOURCES
MAGNETRONS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
MILLI AMP BEAM CURRENTS
PENNING ION SOURCES
PERFORMANCE TESTING
PLASMA DIAGNOSTICS
PLASMATRONS
RESEARCH PROGRAMS
TESTING