2013 Fiscal Year Final Research Report
R&D on crystalline cells for 3He nuclear polarizers
| Project/Area Number |
23654107
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics I
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
INO Takashi 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 講師 (10301722)
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| Project Period (FY) |
2011 – 2013
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| Keywords | Ｘ線・粒子線 / 3He偏極 / 偏極中性子 |
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| Research Abstract |
There is unknown temperature-dependent spin relaxation in the 3He polarization by the spin exchange optical pumping (SEOP). Due to this excess spin relaxation, the 3He polarization by the SEOP is limited up to ~80%. The mechanism of this relaxation is not yet revealed, but a study indicates that the source of the excess relaxation is primarily a surface phenomenon. The 3He gas is usually confined in a specially treated clean glass cell, and the unknown spin relaxation might be related with the porous structure of glass, where 3He atoms permeate in the glass walls. To study the mechanism of the temperature-dependent spin relaxation as well as to overcome the limitation of the 3He polarization, research and development of crystalline cells are performed.
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[Journal Article] Basic Concepts of Polarisation Analysis for Neutron Chopper Spectrometer POLANO at J-PARC2013
Author(s)
K. Ohoyama, T. Yokoo, S. Itoh, J. Suzuki, K. Iwasa, T. J. Sato, H. Kira, Y. Sakaguchi, T. Ino, T. Oku, K. Tomiyasu, M. Matsuura, H. Hiraka, M. Fujita, H. Kimura, T. Sato, J. Suzuki, H. M. Shimizu, T. Arima, M. Takeda, K. Kaneko, M. Hino, S. Muto, H. Nojiri, C. H. Lee, J. G. Park, and S. Choi
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Journal Title
J. Phys. Soc. Jpn
Volume: 82
Pages: SA036
DOI
Peer Reviewed
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