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保罗·谢尔研究所超冷中子源处的超冷中子存储与传输。

Ultracold neutron storage and transport at the PSI UCN source.

作者信息

Bison G, Daum M, Kirch K, Lauss B, Ries D, Schmidt-Wellenburg P, Zsigmond G

机构信息

Laboratory for Particle Physics, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland.

Institute for Particle Physics, ETH Zürich, Zurich, Switzerland.

出版信息

Eur Phys J A Hadron Nucl. 2022;58(6):103. doi: 10.1140/epja/s10050-022-00747-1. Epub 2022 Jun 6.

DOI:10.1140/epja/s10050-022-00747-1
PMID:35693192
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9170659/
Abstract

Efficient neutron transport is a key ingredient to the performance of ultracold neutron (UCN) sources, important to meeting the challenges placed by high precision fundamental physics experiments. At the Paul Scherrer Institute's UCN source we have been continuously improving our understanding of the UCN source parameters by performing a series of studies to characterize neutron production and moderation, and UCN production, extraction, and transport efficiency to the beamport. The present study on the absolute UCN transport efficiency completes our previous publications. We report on complementary measurements, namely one on the height-dependent UCN density and a second on the transmission of a calibrated quantity of UCN over a  m long UCN guide section connecting one beamport via the source storage vessel to another beamport. These allow us quantifying and optimizing the performance of the guide system based on extensive Monte Carlo simulations.

摘要

高效的中子输运是超冷中子（UCN）源性能的关键要素，对于应对高精度基础物理实验带来的挑战至关重要。在保罗·谢尔研究所的UCN源中，我们通过开展一系列研究来表征中子的产生与慢化以及UCN的产生、提取和输运至束流端口的效率，从而不断深化对UCN源参数的理解。目前关于绝对UCN输运效率的研究完善了我们之前的出版物。我们报告了互补测量，即一项关于UCN密度随高度变化的测量，以及另一项关于校准数量的UCN在一段1米长的UCN导向段上的传输测量，该导向段通过源储存容器将一个束流端口连接到另一个束流端口。这些测量使我们能够基于广泛的蒙特卡罗模拟对导向系统的性能进行量化和优化。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a47f/9170659/1482622e9147/10050_2022_747_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a47f/9170659/0842587e410c/10050_2022_747_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a47f/9170659/3a3076858e1d/10050_2022_747_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a47f/9170659/c5b7d349710c/10050_2022_747_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a47f/9170659/c77527481edb/10050_2022_747_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a47f/9170659/a63aa0b8d250/10050_2022_747_Fig13_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a47f/9170659/58e3329d4e9d/10050_2022_747_Fig14_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a47f/9170659/3e634d661b59/10050_2022_747_Fig15_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a47f/9170659/c01d4052667a/10050_2022_747_Fig16_HTML.jpg
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