Development of electron beam ion source charge breeder for rare isotopes at Californium Rare Isotope Breeder Upgrade

Recently, the Californium Rare Isotope Breeder Upgrade (CARIBU) to the Argonne Tandem Linac Accelerator System (ATLAS) was commissioned and became available for production of rare isotopes. Currently, an electron cyclotron resonance ion source is used as a charge breeder for CARIBU beams. To further...

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Bibliographic Details
Published in:Review of scientific instruments 2012-02, Vol.83 (2), p.02A902-02A902-3
Main Authors: Kondrashev, S., Dickerson, C., Levand, A., Ostroumov, P. N., Pardo, R. C., Savard, G., Vondrasek, R., Alessi, J., Beebe, E., Pikin, A., Kuznetsov, G. I., Batazova, M. A.
Format: Article
Language:English
Subjects:
ACCELERATORS
BNL
BREEDING
CALIFORNIUM
Charge
CHARGE STATES
CURRENT DENSITY
Delivery scheduling
EFFICIENCY
ELECTRON BEAM ION SOURCES
ELECTRON BEAMS
ELECTRON CYCLOTRON-RESONANCE
ELECTRON GUNS
ION BEAMS
ION SOURCES
Isotopes
LINEAR ACCELERATORS
PARTICLE ACCELERATORS
PARTICLE BEAMS
SOLENOIDS
SUPERCONDUCTING MAGNETS
SURFACE IONIZATION
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Summary:Recently, the Californium Rare Isotope Breeder Upgrade (CARIBU) to the Argonne Tandem Linac Accelerator System (ATLAS) was commissioned and became available for production of rare isotopes. Currently, an electron cyclotron resonance ion source is used as a charge breeder for CARIBU beams. To further increase the intensity and improve the purity of neutron-rich ion beams accelerated by ATLAS, we are developing a high-efficiency charge breeder for CARIBU based on an electron beam ion source (EBIS). The CARIBU EBIS charge breeder will utilize the state-of-the-art EBIS technology recently developed at Brookhaven National Laboratory (BNL). The electron beam current density in the CARIBU EBIS trap will be significantly higher than that in existing operational charge-state breeders based on the EBIS concept. The design of the CARIBU EBIS charge breeder is nearly complete. Long-lead components of the EBIS such as a 6-T superconducting solenoid and an electron gun have been ordered with the delivery schedule in the fall of 2011. Measurements of expected breeding efficiency using the BNL Test EBIS have been performed using a Cs + surface ionization ion source for external injection in pulsed mode. In these experiments we have achieved ∼70% injection/extraction efficiency and breeding efficiency into the most abundant charge state of ∼17%.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.3660823