Characterization of a ballistic supermirror neutron guide
Characterization of a ballistic supermirror neutron guide
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DOI：
10.1016/j.nima.2006.03.020
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发表时间：
2006-06-15
影响因子：
1.4
通讯作者：
Soldner, T.
中科院分区：
文献类型：
--
作者：
Abele, H.;Dubbers, D.;Soldner, T.
我们描述了第一个弹道超反射镜中子导管H113的束流特性，它为格勒诺布尔劳厄-朗之万研究所（ILL）的粒子物理PF 1B中子用户设施提供能量。目前，H113在20 × 6 cm（2）出射窗口处的中子俘获通量密度为φ（C）= 1.35 × 10（10）cm（-2）s（-1），不久将提高到2 × 10（10）cm（-2）s（-1）以上。光束发散度不大于来自常规Ni涂覆的引导件的光束发散度。一个模型的开发，允许快速计算的光束轮廓和绝对事件率从这样的光束。我们提出了一个程序，允许从弹道或传统的中子导管发射的光束的主要特征的相互比较。(c)2006 Elsevier B. V.保留所有权利。
We describe the beam characteristics of the first ballistic supermirror neutron guide H113 that feeds the neutron user facility for particle physics PF1B of the Institute Laue-Langevin, Grenoble (ILL). At present, the neutron capture flux density of H113 at its 20 x 6 cm(2) exit window is phi(C) = 1.35 x 10(10) cm(-2) s(-1), and will soon be raised to above 2 x 10(10) cm(-2) s(-1). Beam divergence is no larger than beam divergence from a conventional Ni-coated guide. A model is developed that permits rapid calculation of beam profiles and absolute event rates from such a beam. We propose a procedure that permits inter-comparability of the main features of beams emitted from ballistic or conventional neutron guides. (c) 2006 Elsevier B.V. All rights reserved.