近期,我院加速器团队与中国散裂中子源、中科院高能物理研究所合作,对Back-n上首次开展的NRTA测试实验数据进行了分析研究,取得了重要进展。该研究结合飞行时间方法,根据南海文物、模拟月壤两种样品的中子透射谱对应的特征进行了定性研究。结...
中子飞行时间测量SCA波形采样读出电子学中国散裂中子源(CSNS)反角白光中子束线(Back-n)对中子核数据测量和核技术应用等多个领域均有重要意义.为监测其中子束斑轮廓,束流密度及束流能量,研制了由镀硼微网格气体(Micromegas)探测器构成的束流剖面监测装置,并通过测量中子的飞行时间(TOF)来获得能量信息.采用基于开关电容...
计划平台发展和规划总结2Back-n装置基本情况介绍3CSNS反角白光中子源(Back-n)科学目标当前中国唯一极宽谱中子实验装置,国际上流强最高的白光中子束线,研究领域覆盖宽:核物理和核技术:核数据测量(中子诱发的核反应截面):各种微分反应截面(全截面、裂变截面、俘获截面、带电粒子出射、非弹截面、Gamma谱等)、裂变产物...
Back-streaming neutrons through the incoming proton channel at the spallation target station of China Spallation Neutron Source (CSNS) were exploited to build a white neutron beam line (the so-called Back-n). With a proton beam of 100 kW in beam power and 1.6 GeV in kinetic energy and a ...
对于某些易受随反角中子束流从散裂靶来的γ暴影响的实验,一个可行的方法是在ES#1实验厅放置可显著降低γ强度的吸收体如铅块,而将探测器/谱仪放在ES#2实验厅。 2 Back-n上开展核数据测量研究的实验谱仪 绝大多数适合利用飞行时间方法和在线测量的核数据测量实验都可在Back-n上开展,Back-n也因此规划了多台适合...
feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test experiments. The results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at Back-n. This study reveals its potential future ...
(the so-called Back-n white neutron source),which was completed in March 2018.The Back-n neutron beam is very intense,at approximately 29107 n/cm2/s at 55 m from the target,and has a nominal proton beam with a power of 100 kW in the CSNS-I phase and a kinetic energy of 1.6 GeV...
The Back-n beam line started running since the beginning of 2018 and the neutron energy spectrum was measured at the very beginning since it is an essential information for feasibility study and analysis of any measurement. In this paper, the measurement of the neutron energy spectrum of Back-...
The Back-n beam line of the China Spallation Neutron Source is the first white neutron facility in China. One of its goals is to perform radiative neutron capture cross-section (σnγ) measurements. To study the experimental backgrounds of this new facility, a measurement of the σnγ of ...
U-238/U-235 fission cross section ratioCSNS - Back-n WNSMulti-cell fast fission ionization chamberTime-of-flight methodBased on the China Spallation Neutron Source (CSNS) - Back-streaming white neutron source (Back-n WNS), the measurement of the U-238/U-235 fission cross section ratio in...