Cryogenic gas target system for intense RI beam productions in nuclear astrophysics

Journal Article · Wed May 21 00:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2943620· OSTI ID:21143503

Wakabayashi, Y; Yamaguchi, H; Hayakawa, S; Kurihara, Y; Amadio, G; Fujikawa, H; Kubono, S ^[1]; Binh, D N ^[1]; He, J J ^[2]; Kim, A ^[3]

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1. Center for Nuclear Study, University of Tokyo (Japan)
2. School of Physics, University of Edinburgh (United Kingdom)
3. Department of Physics, Ewha Womans University (Korea, Republic of)

A cryogenic gas target system was newly developed to produce intense RI beams at the low-energy in-flight radio-isotope beam separator (CRIB) of the University of Tokyo. The main features of the cryogenic gas target system are the direct cooling of the target cell by a liquid N{sub 2} finger and the circulation of the target gas that goes through the liquid N{sub 2} tank. Hydrogen gas was cooled down to 85-90 K by liquid nitrogen and used as a secondary beam production target which has a thickness of 2.3 mg/cm{sup 2} at the gas pressure of 760 Torr. Intense RI beams, such as a {sup 7}Be beam of 2x10{sup 8} particles per second, were successfully produced using the target.

• OSTI ID: 21143503
• Journal Information: AIP Conference Proceedings, Vol. 1016, Issue 1; Conference: 10. international symposium on origin of matter and evolution of galaxies: From the dawn of Universe to the formation of solar system, Sapporo (Japan), 4-7 Dec 2007; Other Information: DOI: 10.1063/1.2943620; (c) 2008 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
BEAM PRODUCTION
BEAM SEPARATORS
BERYLLIUM 7
BERYLLIUM 7 BEAMS
CRYOGENICS
HEAVY ION REACTIONS
HYDROGEN 1 TARGET
SECONDARY BEAMS