First Results of the Superconducting ECR Ion Source Venus with 28 GHz

Journal Article · Tue Mar 15 00:00:00 EST 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1893356· OSTI ID:20630690

Leitner, D; Lyneis, C M; Abbott, S R; Dwinell, R D; Collins, D; Leitner, M ^[1]

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1. Lawrence Berkeley National Laboratory, 1 Cyclotron Rd. MS88R0192, Berkeley, CA 94708 (United States)

VENUS (Versatile ECR ion source for NUclear Science) is a next generation superconducting ECR ion source, designed to produce high current, high charge state ions for the 88-Inch Cyclotron at the Lawrence Berkeley National Laboratory. VENUS also serves as the prototype ion source for the RIA (Rare Isotope Accelerator) front end. The magnetic confinement configuration consists of three superconducting axial coils and six superconducting radial coils in a sextupole configuration. The nominal design fields of the axial magnets are 4T at injection and 3T at extraction; the nominal radial design field strength at the plasma chamber wall is 2T, making VENUS the world most powerful ECR plasma confinement structure. From the beginning, VENUS has been designed for optimum operation at 28 GHz with high power (10 kW).In 2003 the VENUS ECR ion source was commissioned at 18 GHz, while preparations for 28 GHz operation were being conducted. During this commissioning phase with 18 GHz, tests with various gases and metals have been performed with up to 2000 W RF power. At the initial commissioning tests at 18 GHz, 1100 e{mu}A of O6+, 160 e{mu}A of Xe20+, 160 e{mu}A of Bi25+ and 100 e{mu}A of Bi30+ and 11 e{mu}A of Bi41+ were produced.In May 2004 the 28 GHz microwave power has been coupled into the VENUS ECR ion source. At initial operation more than 320 e{mu}A of Xe20+ (twice the amount extracted at 18 GHz), 240 e{mu}A of Bi24+ and Bi25+, and 245 e{mu}A of Bi29+ were extracted. The paper briefly describes the design of the VENUS source, the 28 GHz microwave system and its beam analyzing system. First results at 28 GHz including emittance measurements are presented.

• OSTI ID: 20630690
• Journal Information: AIP Conference Proceedings, Vol. 749, Issue 1; Conference: ECRIS'04: 16. international workshop on ECR ion sources, Berkeley, CA (United States), 26-30 Sep 2004; Other Information: DOI: 10.1063/1.1893356; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
43 PARTICLE ACCELERATORS
BEAM CURRENTS
BISMUTH IONS
CHARGE STATES
CYCLOTRONS
DESIGN
ECR ION SOURCES
ELECTRON CYCLOTRON-RESONANCE
GHZ RANGE
ION BEAMS
MAGNETIC CONFINEMENT
MAGNETS
MULTICHARGED IONS
OPERATION
OXYGEN IONS
PLASMA
RF SYSTEMS
SUPERCONDUCTING COILS
XENON IONS