A large area polarized 3He neutron spin filter

被引：47
作者：
Chupp, T. E. [1 ]
Coulter, K. P.
Kandes, M.
Sharma, M.
Smith, T. B.
Jones, G.
Chen, W. C.
Gentile, T. R.
Rich, D. R.
Lauss, B.
Gericke, M. T.
Gillis, R. C.
Page, S. A.
Bowman, J. D.
Penttila, S. I.
Wilburn, W. S.
Dabaghyan, M.
Hersman, F. W.
Mason, M.
机构：
[1] Univ Michigan, Focus Ctr, Ann Arbor, MI 48104 USA
[2] Univ Dayton, Dayton, OH 45469 USA
[3] Hamilton Coll, Clinton, NY 13323 USA
[4] NIST, Gaithersburg, MD 20899 USA
[5] Univ Calif Berkeley, Berkeley, CA 94720 USA
[6] Univ Manitoba, Winnipeg, MB R3T 2N2, Canada
[7] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA
[8] Los Alamos Natl Lab, Los Alamos, NM USA
[9] Univ New Hampshire, Durham, NH 03824 USA
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2007年 / 574卷 / 03期
基金：
美国国家科学基金会;
关键词：
polarized neutrons; pulsed neutrons; symmetry tests; spin filters; polarized He-3;
D O I：
10.1016/j.nima.2007.02.091
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A large area polarized He-3 neutron spin filter has been developed and tested in long-term operation. The polarizer cells have area 50 cm(2) and larger allowing access to a large area neutron beam. Polarization of He-3 up to 57 +/- 1% was measured by monitoring the neutron transmission through the He-3. The polarization was maintained over the course of several weeks, but the maximum attainable polarization declined over the course of a year-long run as the cell degraded, possibly due to long-term exposure to the neutron beam at high temperatures. The resulting neutron polarization and transmission are velocity dependent and are optimized for 5 angstrom. Cell construction, polarizer design, performance, and polarimetry are described in this paper. (C) 2007 Published by Elsevier B.V.
引用
收藏
页码：500 / 509
页数：10
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