skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Development of polarized 3He ion source

Abstract

A long history on the polarized 3He ion source developed at RCNP is presented. We started with an 'OPPIS' (Optical Pumping Polarized Ion Source) and later found the fundamental difficulties in the OPPIS. To overcome them an 'EPPIS' (Electron Pumping Polarized Ion Source) was proposed and its validity was experimentally proven. However, a serious technical disadvantage was also found in the EPPIS. To avoid this disadvantage we proposed a new concept, 'SEPIS' (Spin Exchange Polarized Ion Source), which uses an enhanced spin-exchange cross section theoretically expected at low 3He+ incident energies for the 3He+ + Rb system.Next, we describe the present status of the SEPIS development; construction of a bench test device allowing the measurements of not only the spin-exchange cross sections {sigma}se but also the electron capture cross sections {sigma}ec for the 3He+ + Rb system. The latest experimental data on {sigma}ec are presented and compared with other previous experimental data and the theoretical calculations. A design study of the SEPIS for practical use in nuclear (cyclotron) and particle physics (synchrotron) is shortly mentioned.Finally, we mention possibility to polarize ions heavier than 3He as an application of SEPIS. The theoretical calculation showed that {sigma}se comparable to that for themore » 3He+ + Rb is expected for the Li2+ + Rb system, which suggests that the SEPIS will hopefully be a general tool to polarize any heavy ions.« less

Authors:
 [1]; ;  [2];  [3]; ;  [4];  [5]
  1. Department of Clinical Technology, Kobe Tokiwa College, Ohtani-cho 2-6-2, Nagata-ku, Kobe 653-0083 (Japan)
  2. Department of Physics, Graduate School of Science, Osaka University, 1-1, Machikaneyama, Toyonaka, Osaka 560-0043 (Japan)
  3. Department of Physics, Tokyo Institute of Technology, O-okayama 2-12-1, Tokyo 152-8551 (Japan)
  4. Research Center for Nuclear Physics, Osaka University, Mihogaoka 10-1, Ibaraki, Osaka 567-0047 (Japan)
  5. Department of Chemistry, Niigata University, Nino-cho 8050, Niigata 950-2181 (Japan)
Publication Date:
OSTI Identifier:
21056732
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 891; Journal Issue: 1; Conference: 6. Symposium on nuclear physics, Tours (France), 5-8 Sep 2006; Other Information: DOI: 10.1063/1.2713510; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CROSS SECTIONS; ELECTRON CAPTURE; ELECTRONS; HEAVY IONS; HELIUM 3; HELIUM 3 REACTIONS; ION SOURCES; OPTICAL PUMPING; POLARIZED TARGETS; RUBIDIUM 85 TARGET; RUBIDIUM 87 TARGET; SPIN EXCHANGE

Citation Formats

Tanaka, M., Takahashi, Y., Shimoda, T., Yasui, S., Yosoi, M., Takahisa, K., and Shimakura, N. Development of polarized 3He ion source. United States: N. p., 2007. Web. doi:10.1063/1.2713510.
Tanaka, M., Takahashi, Y., Shimoda, T., Yasui, S., Yosoi, M., Takahisa, K., & Shimakura, N. Development of polarized 3He ion source. United States. doi:10.1063/1.2713510.
Tanaka, M., Takahashi, Y., Shimoda, T., Yasui, S., Yosoi, M., Takahisa, K., and Shimakura, N. Mon . "Development of polarized 3He ion source". United States. doi:10.1063/1.2713510.
@article{osti_21056732,
title = {Development of polarized 3He ion source},
author = {Tanaka, M. and Takahashi, Y. and Shimoda, T. and Yasui, S. and Yosoi, M. and Takahisa, K. and Shimakura, N.},
abstractNote = {A long history on the polarized 3He ion source developed at RCNP is presented. We started with an 'OPPIS' (Optical Pumping Polarized Ion Source) and later found the fundamental difficulties in the OPPIS. To overcome them an 'EPPIS' (Electron Pumping Polarized Ion Source) was proposed and its validity was experimentally proven. However, a serious technical disadvantage was also found in the EPPIS. To avoid this disadvantage we proposed a new concept, 'SEPIS' (Spin Exchange Polarized Ion Source), which uses an enhanced spin-exchange cross section theoretically expected at low 3He+ incident energies for the 3He+ + Rb system.Next, we describe the present status of the SEPIS development; construction of a bench test device allowing the measurements of not only the spin-exchange cross sections {sigma}se but also the electron capture cross sections {sigma}ec for the 3He+ + Rb system. The latest experimental data on {sigma}ec are presented and compared with other previous experimental data and the theoretical calculations. A design study of the SEPIS for practical use in nuclear (cyclotron) and particle physics (synchrotron) is shortly mentioned.Finally, we mention possibility to polarize ions heavier than 3He as an application of SEPIS. The theoretical calculation showed that {sigma}se comparable to that for the 3He+ + Rb is expected for the Li2+ + Rb system, which suggests that the SEPIS will hopefully be a general tool to polarize any heavy ions.},
doi = {10.1063/1.2713510},
journal = {AIP Conference Proceedings},
number = 1,
volume = 891,
place = {United States},
year = {Mon Feb 26 00:00:00 EST 2007},
month = {Mon Feb 26 00:00:00 EST 2007}
}