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Design of in-flight fragment separator using high-power primary beams in the energy of a few hundred MeV/u

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Title
Design of in-flight fragment separator using high-power primary beams in the energy of a few hundred MeV/u
Author(s)
J. Y. Kim; J. W. Kim; Weish Wan
Publication Date
2015-07
Journal
REVIEW OF SCIENTIFIC INSTRUMENTS, v.86, no.7, pp.073302-1 - 073302-8
Publisher
AMER INST PHYSICS
Abstract
An in-flight fragment separator usually requires large acceptance and high momentum resolution to minimize the loss of a rare isotope beam of interest produced at a thin target, which is especially important when 238U fission reactions in the energy of 200 MeV/u are used. The production target and beam dump are located in the pre-separator, where a beam power of up to 400 kW is dissipated. The area is surrounded by thick radiation shielding walls, which result in long drift spaces between adjacent magnetic components at various locations and an asymmetrical layout. Efforts have been made to minimize non-linear effects in the pre-separator beam optics with trials of different separator configurations and correction schemes using COSY Infinity and GICOSY. The main separator is configured to be mirror symmetric such that correction with hexapole and octupole coils can be more readily applied. The separator configuration was finalized to allow the facility design to proceed and the key components including superconducting magnets have been designed and prototyped. In addition, the separator design has been evaluated using LISE++ including a set of wedge degraders at dispersive focal planes to improve the yield and purity of selected isotope beam.
URI
http://pr.ibs.re.kr/handle/8788114/2926
DOI
10.1063/1.4923284
ISSN
0034-6748
Appears in Collections:
HiddenCommunity > Journal Papers
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