RCNP Project on Polarized {sup 3}He Ion Sources - From Optical Pumping to Cryogenic Method
- Department of Clinical Technology, Kobe Tokiwa University, Ohtani-cho 2-6-2, Nagata-ku, Kobe 653-0838 (Japan)
- Research Center for Nuclear Physics, Osaka University, Mihogaoka 10-1, Ibaraki, Osaka 567-0047 (Japan)
- Department of Physics, Graduate School of Science, Osaka University, 1-1, Machikaneyama, Toyonaka, Osaka 560-0043 (Japan)
- Joint Institute for Nuclear Research, Dubna, RU-141980, Moscow region (Russian Federation)
- Kamerlingh Onnes Institute, Leiden University, Leiden (Netherlands)
- IN2P3, Institut de Physique Nucleaire, Orsay France (France)
A polarized {sup 3}He ion source has been developed at RCNP for intermediate and high energy spin physics. Though we started with an OPPIS (Optical Pumping Polarized Ion Source), it could not provide highly polarized {sup 3}He beam because of fundamental difficulties. Subsequently to this unhappy result, we examined novel types of the polarized {sup 3}He ion source, i.e., EPPIS (Electron Pumping Polarized Ion Source), and ECRPIS (ECR Polarized Ion Source) experimentally or theoretically, respectively. However, attainable {sup 3}He polarization degrees and beam intensities were still insufficient for practical use. A few years later, we proposed a new idea for the polarized {sup 3}He ion source, SEPIS (Spin Exchange Polarized Ion Source) which is based on enhanced spin-exchange cross sections at low incident energies for {sup 3}He{sup +}+Rb, and its feasibility was experimentally examined.Recently, we started a project on polarized {sup 3}He gas generated by the brute force method with low temperature (approx4 mK) and strong magnetic field (approx17 T), and rapid melting of highly polarized solid {sup 3}He followed by gasification. When this project will be successful, highly polarized {sup 3}He gas will hopefully be used for a new type of the polarized {sup 3}He ion source.
- OSTI ID:
- 21344463
- Journal Information:
- AIP Conference Proceedings, Vol. 1149, Issue 1; Conference: SPIN 2008: 18. International Spin Physics Symposium, Charlottesville, VA (United States), 6-11 Oct 2008; Other Information: DOI: 10.1063/1.3215779; (c) 2009 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of polarized 3He ion source
RCNP polarized {sup 3}He ion source