Aza E, Dinar N, Manessi G P, Silari M
CERN, Geneva 23 CH-1211, Switzerland Department of Physics, Aristotle University of Thessaloniki, Thessaloniki GR-54124, Greece.
CERN, Geneva 23 CH-1211, Switzerland.
Radiat Prot Dosimetry. 2016 Feb;168(2):149-53. doi: 10.1093/rpd/ncv180. Epub 2015 May 5.
The use of conventional Bonner Sphere Spectrometers (BSS) in pulsed neutron fields (PNF) is limited by the fact that proportional counters, usually employed as the thermal neutron detectors, suffer from dead time losses and show severe underestimation of the neutron interaction rate, which leads to strong distortion of the calculated spectrum. In order to avoid these limitations, an innovative BSS, called BSS-LUPIN, has been developed for measuring in PNF. This paper describes the physical characteristics of the device and its working principle, together with the results of Monte Carlo simulations of its response matrix. The BSS-LUPIN has been tested in the stray neutron field at the CERN Proton Synchrotron, by comparing the spectra obtained with the new device, the conventional CERN BSS and via Monte Carlo simulations.
传统的邦纳球谱仪（BSS）在脉冲中子场（PNF）中的应用受到限制，因为通常用作热中子探测器的正比计数器存在死时间损失，并且对中子相互作用率有严重低估，这导致计算出的能谱严重失真。为了避免这些限制，已开发出一种名为BSS-LUPIN的创新型BSS用于在PNF中进行测量。本文描述了该装置的物理特性及其工作原理，以及其响应矩阵的蒙特卡罗模拟结果。通过比较新装置、传统的欧洲核子研究组织（CERN）BSS所获得的能谱以及通过蒙特卡罗模拟得到的能谱，BSS-LUPIN已在欧洲核子研究组织质子同步加速器的杂散中子场中进行了测试。
