Preliminary performance of the LBL AECR

Conference · Thu Nov 01 04:00:00 EST 1990

OSTI ID:5843197

Lyneis, C M; Xie, Zuqi; Clark, D J; Lam, R S; Lundgren, S A

The AECR source, which operates at 14 GHz, is being developed for the 88-Inch Cyclotron at Lawrence Berkeley Laboratory. The AECR has been under source development since December 1989, when the mechanical construction was completed. The first AECR beams were injected into the cyclotron in June of 1990 and since then a variety of ion species from the AECR have been accelerated. The cyclotron recently accelerated {sup 209}Bi{sup 38+} to 954 MeV. An electron gun, which injects 10 to 150 eV electrons into the plasma chamber of the AECR, has been developed to increase the production of high charge state ions. With the electron gun the AECR has produced at 10 kV extraction voltage 131 e{mu}A of O{sup 7+}, 13 e{mu}A of O{sup 8+}, 17 e{mu}A of Ar{sup 14+}, 2.2 e{mu}A of Kr{sup 25+}, 1 e{mu}A of Xe{sup 31+}, and 0.2 e{mu}A of Bi{sup 38+}. The AECR was also tested as a single stage source with a coating of SiO{sub 2} on the plasma chamber walls. This significantly improved its performance compared to no coating, but direct injection of electrons with the electron gun produced the best results. 5 refs., 6 figs., 4 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5843197
• Report Number(s): LBL-30523; CONF-9011136--5; ON: DE91012356
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430301* -- Particle Accelerators-- Ion Sources
ACCELERATORS
BEAM CURRENTS
CURRENTS
CYCLIC ACCELERATORS
CYCLOTRON RESONANCE
CYCLOTRONS
DEPOSITION
ELECTRON CYCLOTRON-RESONANCE
ELECTRON GUNS
ION SOURCES
ISOCHRONOUS CYCLOTRONS
LBL 88-INCH CYCLOTRON
PERFORMANCE TESTING
RESONANCE
SURFACE COATING
TESTING
UCLRL CYCLOTRONS