In-situ SEOP polarizer and initial tests on a high flux neutron beam

被引：15

作者：

Babcock, E. ^{[1
,2
]}

Boag, S. ^{[3
]}

Andersen, K. H. ^{[2
]}

Becker, M. ^{[2
]}

Beecham, C. ^{[2
,3
]}

Bordenave, F. ^{[2
]}

Chastagnier, J. ^{[2
]}

Chen, W. C. ^{[4
]}

Chung, R. ^{[2
]}

Chupp, T. E. ^{[5
]}

Elmore, S. ^{[3
]}

Fouilloux, P. ^{[2
]}

Gentile, T. R. ^{[4
]}

Jullien, D. ^{[2
]}

Lelievre-Berna, E. ^{[2
]}

Mouveau, P. ^{[2
]}

Petoukhov, A. ^{[2
]}

Revert, M. ^{[2
]}

Soldner, T. ^{[2
]}

机构：

[1] Jeulich Ctr Neutron Sci, Garching, Germany

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[3] ISIS, Didcot OX11 QX, Oxon, England

[4] NIST, Gaithersburg, MD 20899 USA

[5] Univ Michigan, FOCUS, Ann Arbor, MI 48109 USA

来源：

PHYSICA B-CONDENSED MATTER | 2009年 / 404卷 / 17期

基金：

美国国家科学基金会;

关键词：

Helium; Neutron; Optical pumping; Polarization; Spin filter; HE-3 SPIN FILTERS; SCATTERING; TARGET;

D O I：

10.1016/j.physb.2009.06.041

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Polarized (3)He has shown its unique characteristics in many areas of polarized neutron scattering, its ability to polarize neutrons at short wavelengths, accept wide-angle and divergent beams and low backgrounds enable new classes of experiments. While polarized (3)He is not a steady state solution as commonly applied, the benefits have been shown to offset the drawbacks of polarizing and refreshing the polarization in the neutron spin filter cells. As an extension of this work, in-situ polarization using the spin-exchange optical pumping (SEOP) method was explored as a means to construct a system which could be used to polarize (3)He in the state used for an effective neutron spin filter to constant polarization while on the neutron beam. An in-situ SEOP polarizer was constructed. This device utilized many devices and principles developed for neutron spin filters which are polarized off the beam line using either SEOP or metastability exchange optical pumping (MEOP) under the same research program. As a collimation of this work effects of extremely high neutron capture flux density >1 x 10(10) cm(-2) s(-1) incident on the in-situ polarizer were explored. Published by Elsevier B.V.

引用

页码：2655 / 2658

页数：4

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