Fourth-generation spallation neutron target-moderator-reflector-shield assembly at the Manuel Lujan Jr. neutron scattering center

被引：45
作者：
Mocko, M. [1 ]
Muhrer, G. [1 ]
机构：
[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2013年 / 704卷
基金：
美国能源部;
关键词：
Target moderator reflector shield; Spallation neutron production; Neutron beam characterization; Beryllium reflector filter; HYDROGEN MODERATOR; SCIENCE CENTER; FILTER;
D O I：
10.1016/j.nima.2012.11.103
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
This paper describes the basic design of the new Target-Moderator-Reflector-Shield (TMRS) assembly, which was installed at the Los Alamos Neutron Science Center's Manuel Lujan Jr. Neutron Scattering Center (Lujan Center). The current TMRS, known as the Mark-III, is a fourth-generation spallation neutron target in service at the Lujan Center. Our new design makes a number of new improvements over previous iterations on the TMRS. Key among these improvements is the first production implementation of a cold beryllium reflector-filter at the core of the spallation neutron source - this reflector-filter is the first of its type in the world. Although we describe all implemented improvements to the TMRS, we focus on describing the design of the cold beryllium reflector-filter. Also presented are a detailed neutronic analysis of the predicted performance and influence of various external conditions on cold-neutron performance. Published by Elsevier B.V.
引用
收藏
页码：27 / 35
页数：9
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