Development of Low Charge-to-Mass Ratio Post-Accelerator for the RIA Project

Journal Article · Tue Aug 26 04:00:00 EDT 2003 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1619878· OSTI ID:20632513

Ostroumov, P N ^[1]

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1. Physics Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439 (United States)

A post-accelerator for rare isotopes (RIB linac) which must produce high-quality beams of radioactive ions over the full mass range, including uranium, at energies above the coulomb barrier is being developed for the U.S. RIA facility. To provide highest possible intensity of rare isotopes with masses from 6 to 240, the linac will accept all ions in the 1+ charge state. A high resolution separator for purifying beams at the isobaric level precedes the RIB linac. Charge stripping in the linac takes place at two stages: helium gas stripping at energies of a few tens of keV/u, and an additional foil stripping at {approx}680-1700 keV/u for the heavier ions. The RIB linac will utilize existing superconducting heavy-ion linac technology for all but one exceptional piece, a very-low-charge-state injector, which is needed for the first {approx}9 MV of the accelerator. This section consists of a pre-buncher followed by three sections of cw, normally-conducting RFQ. The first section is a conventional RFQ operating at 12 MHz. The following two sections are hybrid RFQs operating at 12 and 24 MHz. A 1:2 scale cold model of 12 MHz RFQ was built and it is being studied in order to determine final specifications for the full power 12 MHz hybrid RFQ. This paper reports on the present status of the RIB linac development with particular attention paid to the very-low-charge-state injector section.

• OSTI ID: 20632513
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 680; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM INJECTION
CHARGE STATES
COULOMB FIELD
HEAVY IONS
HELIUM
LINEAR ACCELERATORS
MASS
MHZ RANGE 01-100
RADIOACTIVE ION BEAMS
RF SYSTEMS
SPECIFICATIONS
STRIPPING
SUPERCONDUCTING DEVICES
URANIUM