A compact neutron Ramsey resonance apparatus for polarised neutron radiography

被引：8

作者：

Piegsa, F. M. ^{[1
,2
]}

van den Brandt, B. ^{[1
]}

Hautle, P. ^{[1
]}

Konter, J. A. ^{[1
]}

机构：

[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[2] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2009年 / 605卷 / 1-2期

关键词：

Neutron physics; Ramsey resonance technique; Neutron radiography; BEAM; LENGTH;

D O I：

10.1016/j.nima.2009.01.161

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A compact apparatus to perform polarised neutron radiography on macroscopic objects is presented. Its working principle, based on Ramsey's resonance technique, allows to observe interactions between neutron spins and magnetic fields. Despite its shortness of only 480 mm, the magnetic field homogeneity allows for large beam cross-sections of up to 20 x 20 mm(2). The applied magnetic field at the sample position is variable and can be tuned from about 4 to almost 32 mT without violating the Ramsey resonance condition. The performance of the apparatus is demonstrated in systematic tests, which show a phase stability of 1 degree and a sensitivity of about 7.5 x 10(-8)Tm. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：5 / 8

页数：4

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