Characteristics of the negative ion beam extracted from an LBL multicusp volume source

Conference · Mon Jan 01 00:00:00 EST 1990 · Review of Scientific Instruments; (USA)

OSTI ID:6908577

Debiak, T W; Solensten, L; Sredniawski, J J; Ng, Y C; Heuer, R ^[1]

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1. Grumman Corporation, Bethpage, New York 11714 (US)

This work encompasses a study of the beam position, profile, and emittance of a Lawrence Berkeley Lab (LBL) multicusp volume source. The study includes a comparison of different extraction geometries with single- and multiple-hole apertures. Our work is currently based on single-gap extraction and acceleration. These experiments are the first of a planned series of studies with various extractor geometries. The beam profile full width at half-maximum ranged from 5.7 to 10.2 mm at a position 69 mm from the emission aperture. Measurements of profile and position in the vertical direction indicate that the beam is significantly bent in the direction expected due to the field of the electron separation magnet. Phase space contour plots in the horizontal plane have been obtained for circular extraction apertures with a diameter of 1.0 and 2.0 mm, and a multiple-hole aperture with an overall diameter of 2.46 mm. Emittances were calculated to be as low as 0.0010 {pi} cm mrad for the 1-mm aperture and 0.0014 {pi} cm mrad for the 2-mm aperture. Emittances are not reported for the multiple-hole aperture due to the shape of the phase space contours; however, analysis of the data is in progress to provide a meaningful comparison of the single-hole and multiple-hole beam characteristics.

• OSTI ID: 6908577
• Report Number(s): CONF-890703-; CODEN: RSINA; TRN: 90-013619
• Journal Information: Review of Scientific Instruments; (USA), Vol. 61:1; Conference: International conference on ion sources, Berkeley, CA (USA), 10-14 Jul 1989; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM EMITTANCE
MEASURING METHODS
BEAM POSITION
BEAM PROFILES
ION BEAMS
FARADAY CUPS
KEV RANGE 10-100
LAWRENCE BERKELEY LABORATORY
MAGNETS
PHASE SPACE
BEAM MONITORS
BEAMS
ENERGY RANGE
KEV RANGE
MATHEMATICAL SPACE
MEASURING INSTRUMENTS
MONITORS
NATIONAL ORGANIZATIONS
SPACE
US AEC
US DOE
US ERDA
US ORGANIZATIONS
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics