Simulation of the background of experimental end-stations and the collimator system of the CSNS back-streaming white neutron source

REN Jie; RUAN Xichao; TANG Hongqing; GE Zhigang; HUANG Hanxiong; JING Hantao; TANG Jingyu; HUANG Weiling

doi:10.11889/j.0253-3219.2014.hjs.37.100521

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Simulation of the background of experimental end-stations and the collimator system of the CSNS back-streaming white neutron source

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- Simulation of the background of experimental end-stations and the collimator system of the CSNS back-streaming white neutron source
- NUCLEAR TECHNIQUES Vol. 37, Issue 10, Article number: 100521(2014)
- 作者机构：
  
  1. 中国原子能科学研究院核数据重点实验室,北京,102413
  2. 中国科学院高能物理研究所,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2014.hjs.37.100521
  CLC：
- Published：16 October 2014
- 稿件说明：
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REN Jie, RUAN Xichao, TANG Hongqing, et al. Simulation of the background of experimental end-stations and the collimator system of the CSNS back-streaming white neutron source[J]. Nuclear techniques, 2014, 37(10): 100521
DOI：

REN Jie, RUAN Xichao, TANG Hongqing, et al. Simulation of the background of experimental end-stations and the collimator system of the CSNS back-streaming white neutron source[J]. Nuclear techniques, 2014, 37(10): 100521 DOI： 10.11889/j.0253-3219.2014.hjs.37.100521.

摘要

散裂中子源可产生白光中子，具有中子注量率高、热功率小、可脉冲化等优点，其应用十分广泛。其中一个重要的应用是核数据测量。目前，中国缺少白光中子源，因此一直没有开展基于白光中子源的核数据测量工作。目前在建的中国散裂中子源(China Spallation Neutron Source

CSNS)的反角中子束线，在距散裂靶80 m处的中子强度约为9.25×106n?cm?2?s?1，时间分辨率为0.3%?0.9%，能够较好地用于核数据测量工作。本文介绍了该白光中子束线及实验终端的概况，并重点介绍该实验终端本底计算结果、中子准直系统和束斑参数。通过计算结果得出，CSNS反角白光中子源物理终端具有较低的实验本底和较好的中子束斑，可以开展较高精度的核数据测量工作。

Abstract

Background: The spallation neutron source can generate pulsed white neutron beam and has the advantages such as very high neutron flux and low thermal power

which is used widely in many fields. One of its applications is for nuclear data measurement. However

up to now

no nuclear data measurement based on the white neutron has been carried out in China due to the lack of the white neutron source. Purpose: The China Spallation Neutron Source (CSNS)

which is now under construction

will provide us a good opportunity to do nuclear data measurement with its back-streaming neutron beamline. This beamline can provide very intensive neutron flux and reasonable time resolution of white neutrons which are very suitable for nuclear data measurement. Methods: This paper introduces part of the physical design of the back-streaming neutron beamline

especially the Monte Carlo simulation of the two end-stations’ background and the collimator system. Results and Conclusion: According to the simulation results

the neutron and gamma background in the end-stations are very low. And the beam profile of the CSNS back-streaming white neutron source can be well controlled. With the low intensity of background and well designed beam profile

we can develop very high precision nuclear data measurement with the CSNS back-streaming white neutron source. Abstract

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Related Author

HUANG Weiling

TANG Jingyu

JING Hantao

HUANG Hanxiong

GE Zhigang

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RUAN Xichao

REN Jie

Related Institution

School of Physics and Technology, Xinjiang University

Northwest Institute of Nuclear Technology, Xi ’an

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