Comparison of high-intensity multiaperture and single-aperture duoplasmatrons for a lamb-shift polarized ion source

Conference · Tue Jan 01 04:00:00 EST 1974

OSTI ID:4010088

Trainor, T A; Clegg, T B

A high intensity duoplasmatron was constructed, and two different extraction systems were used with this ion source to produce positive ion beams for a Lamb-shift source. The multiaperture system consists of a 2 cm dia hexagonal array of 55 apertures, each 2.2 mm dia, in three aligned electrodes. Total extracted beam with this system is typically 50 mA. A 1.1 kV D$sup +$ ion beam of 24 $mu$A is delivered to a 1.25 cm dia suppressed Faraday cup 160 cm from the ion source. The single-aperture system consists of two 70$sup 0$ conical electrodes separated by a flat 3.2 mm thick electrode with a 6.3 mm dia aperture at the center. Total extracted beam with this system is typically 10 mA. A beam intensity of 11.5 $mu$A is observed at the Faraday cup. Arc currents during these measurements are typically 20 A. Polarized beam quality with the single- aperture extraction system is far superior to that corresponding to the multiaperture system. Factors contributing to this result are discussed. (auth)

• Research Organization: Univ. of North Carolina, Chapel Hill, NC; California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• NSA Number: NSA-33-026937
• OSTI ID: 4010088
• Report Number(s): LBL--3399(Suppl.); CONF-741019--
• Country of Publication: United States
• Language: English

Related Subjects

*DUOPLASMATRONS-- DESIGN
*POLARIZED BEAMS-- DUOPLASMATRONS
430301* --Particle Accelerators--Auxiliaries & Components-- Ion Sources
BEAM EXTRACTION
DEUTERON BEAMS
LAMB SHIFT
MILLI AMP BEAM CURRENTS
N54300* --Particle Accelerators--Ion Sources
Injection & Extraction