Neutron optics of the PSI ultracold-neutron source: characterization and simulation

被引：14

作者：

Bison, G. ^{[1
]}

Blau, B. ^{[1
]}

Daum, M. ^{[1
]}

Goeltl, L. ^{[1
]}

Henneck, R. ^{[1
]}

Kirch, K. ^{[1
,2
]}

Lauss, B. ^{[1
]}

Ries, D. ^{[1
,2
,3
]}

Schmidt-Wellenburg, P. ^{[1
]}

Zsigmond, G. ^{[1
]}

机构：

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

[2] Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland

[3] Johannes Gutenberg Univ Mainz, Dept Chem TRIGA Site, D-55138 Mainz, Germany

来源：

EUROPEAN PHYSICAL JOURNAL A | 2020年 / 56卷 / 02期

基金：

瑞士国家科学基金会;

关键词：

SOLID-DEUTERIUM SOURCE; DIAMOND-LIKE CARBON; SPALLATION TARGET; TRANSMISSION; UCN; FACILITY; PHYSICS; FOILS;

D O I：

10.1140/epja/s10050-020-00027-w

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The ultracold-neutron (UCN) source at the Paul Scherrer Institute serves mainly experiments in fundamental physics. High UCN intensities are the key for progress and success in such experiments. A detailed understanding of all source parameters is required for future improvements. Here we present the UCN source components, elements of the neutron optics, the characterization of important related parameters like emptying times, storage times and transmission probabilities of UCNs, which are ultimately defining the UCN intensity delivered at the beamports. We also introduce a detailed simulation model of the PSI UCN source, used to analyze the measurements and to extract surface parameters. This work illustrates the successful construction and operation of a large-scale facility delivering high UCN count rate. The observed characteristics of many neutron-optics parameters has been successfully simulated in a detailed Monte-Carlo model implemented in the MCUCN code.

引用

页数：26

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