RCNP Project on Polarized (3)He Ion Sources - From Optical Pumping to Cryogenic Method

• Published in: AIP conference proceedings Vol. 1149; pp. 859 - 862
• Main Authors: Tanaka, M, Inomata, T, Takahashi, Y, Fujiwara, M, Shimoda, T, Yosoi, M, Takahisa, K, Kohri, H, Ohta, T, Morisaki, C, Kunimatsu, T, Plis, Yu A, Frossati, G, Didelez, J P
• Format: Journal Article
• Language: English
• Published: 11.10.2008
• ISSN: 0094-243X

A polarized (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 (3)He beam because of fundamental difficulties. Subsequently to this unhappy result, we examined novel types of the polarized (3)He ion source, i.e., EPPIS (Electron Pumping Polarized Ion Source), and ECRPIS (ECR Polarized Ion Source) experimentally or theoretically, respectively. However, attainable (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 (3)He ion source, SEPIS (Spin Exchange Polarized Ion Source) which is based on enhanced spin-exchange cross sections at low incident energies for (3)He(+) + Rb, and its feasibility was experimentally examined.