EXTRACTION OF HIGHLY CHARGED AU IONS FROM A MULTIAMPHERE ELECTRON BEAM EBIS AT BNL.

Conference · Sun Sep 02 04:00:00 EDT 2001

OSTI ID:789440

BEEBE, E N ^[1]; ALESSI, J G; GOULD, O; GRAHAM, D; KPONOU, A; PIKIN, A; PRELEC, K; RITTER, J

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1. BROOKHAVEN NATIONAL LABORATORY

Excellent progress has been made in the operation of the BNL Electron Beam Ion Source (EBIS), which is a prototype for an EBIS that could meet requirements for a RHIC preinjector. We have achieved very stable operation of the electron beam at 10 A through the EBIS trap. Ion injection of low charge gold ions from a LEVA [1] ion source and subsequent extraction of these ions with most probable charge state AU{sup 34+} has been demonstrated with electron beams up to 8A. The total ion charge for gold measured on current transformer at the EBIS exit was 55nC after a 30ms confinement period. This corresponds to {approx}85% of the theoretical ion trap capacity and exceeds our goal of 50% neutralization. The collected ion charge is proportional to the electron current and the gold charge state scales with the electron current density. Details of the EBIS configuration, total charge measurements, and TOF spectra are given.

• Research Organization: Brookhaven National Lab., Upton, NY (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 789440
• Report Number(s): BNL--68744; KA040301; KA040301
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
BATTERY CHARGE STATE
BNL
CURRENT DENSITY
ELECTRON BEAM ION SOURCES
ELECTRON BEAMS
ELECTRONS
GOLD IONS
ION SOURCES