共查询到16条相似文献,搜索用时 67 毫秒
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介绍了一种基于反冲质子法和磁分析技术的氘氚聚变诊断方法, 适用于稳态及脉冲条件下的等离子体温度、燃料密度和中子产额的精确诊断. 设计了小型的原理性装置, 磁分析器使用高性能钕铁硼二极永磁铁, 焦平面上使用CR-39固体径迹探测器或PIN探测器测量质子位置分布. 使用239Pu α 源对磁分析器进行了实验标定, 建立了配套的模拟程序. 利用蒙特卡罗方法模拟分析了装置整体性能, 并在K-400加速器上进行了中子实验研究. 相似文献
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介绍了一种基于反冲质子法和磁分析技术的新型DT聚变中子谱仪, 能够以高信噪比对9—17MeV的中子能谱进行精确测量, 适用于稳态及脉冲条件下的等离子体温度(Ti)和燃料面密度(<ρR)的诊断, 对14 MeV的初级DT中子具有约4%的能量分辨率和约10-8的探测效率。谱仪的磁分析系统使用高性能钕铁硼二极永磁铁建造, 焦平面上使用CR-39固体径迹探测器测量反冲质子的位置分布。使用239Pu α源对磁分析系统进行了实验研究,并建立了配套的粒子输运模拟程序。 结合实验和程序模拟结果,使用蒙特卡罗软件模拟分析了谱仪整体性能。 谱仪结构紧凑、性能良好且适用于稳态及脉冲辐射场,可望在未来的聚变研究中得到有效应用。 Design of a novel spectrometer for measurements of neutrons in the energy range 9—17 MeV has been proposed. Based on proton recoil method and magnetic analyzing technigue, the spectrometer can be used to determine DT fuel areal density(<ρR) and ion temperature under steady state and pulsed radiation field. The detection efficiency is about 10-8 for measuring 14 MeV neutrons with an energy resolution of about 4%. A neodymium iron boron permanent dipole was used for the magnetic analyzing system and CR-39 track detectors were used in the focal plane. The system has been tested with 239Pu α suorce and a corresponding particle transport simulation program has been worked out. Performance of the spectrometer was investigated with Monte Carlo simulation, experiment data and the transport simulation. Due to its good performance, compact structure,and availability for both steady state and pulsed radiation field, the spectrometer can be effectively used for fusion research in the future. 相似文献
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为了获得脉冲中子探测系统的中子灵敏度能量响应,编制了适合裂变中子测量探测系统灵敏度能响的一系列专用程序,研究了相应的实验标定技术,采用理论计算和实验验证相结合的方法,对几套探测系统中子灵敏度能量响应进行了研究,初步解决了标定需要的“单能、脉冲、高强度、多个不同能量的中子源”问题,使不确定度大大提高,满足了测量的要求。 相似文献
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The magnetic proton recoil(MPR)spectrometer is a novel diagnostic instrument with high perfor-mance for measurements of neutron spectra in inertial confinement fusion(ICF)experiments and high power fusion devices.A compact MPR-type spectrometer dedicated to the research of pulsed deuterium-tritium(DT)neutron spectroscopy of special experimental conditions is currently under design.Analyses of the main parameters and performance of the magnetic analysis system through 3-D particle transport calculations and MonteCarlo simulations and calibration of the system performance as a test using CR-39 solid track detector and α particle from 239pu and 226Ra radioactive sources are presented in this paper.The results indicate that the magnetic analysis system will achieve a detection efficiency level of 10-5-10-4 at an energy resolution of 1.5%-2.1%,and fulfills the design goals of the spectrometer. 相似文献
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The magnetic proton recoil(MPR)spectrometer is a novel diagnostic instrument with high perfor-mance for measurements of neutron spectra in inertial confinement fusion(ICF)experiments and high power fusion devices.A compact MPR-type spectrometer dedicated to the research of pulsed deuterium-tritium(DT)neutron spectroscopy of special experimental conditions is currently under design.Analyses of the main parameters and performance of the magnetic analysis system through 3-D particle transport calculations and MonteCarlo simulations and calibration of the system performance as a test using CR-39 solid track detector and α particle from 239pu and 226Ra radioactive sources are presented in this paper.The results indicate that the magnetic analysis system will achieve a detection efficiency level of 10-5-10-4 at an energy resolution of 1.5%-2.1%,and fulfills the design goals of the spectrometer. 相似文献
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Design and performance analysis of a compact magnetic proton recoil spectrometer for DT neutrons 下载免费PDF全文
A magnetic proton recoil (MPR) spectrometer is a novel instrument with superior performance, including high energy resolution, high count rate and good signal-to-noise ratio (SNR) for measurements of neutron spectra from inertial confinement fusion (ICF) experiments and high power Tokomaks. In this work, the design of a compact MPR spectrometer (cMPR) was evaluated for deuteron-tritium (DT) neutron spectroscopy. The characteristics of the spectrometer were analyzed using 2-D beam transport simulations, 3-D particle transport calculations and Monte-Carlo simulations. Based on the theoretical results, an instrument design that satisfies special experimental requirements is proposed. The energy resolution and efficiency of the spectrometer are also evaluated. The results indicate that the proposed cMPR spectrometer would achieve a detection efficiency and energy resolution of approximately 10<'-8> and 4%, respectively, for DT neutrons. 相似文献
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Guan-Ying Wang Ran Han Xiao-Ping Ouyang Jin-Cheng He Jun-Yao Yan 《中国物理C(英文版)》2017,41(5):056201-056201
A reconstruction algorithm for unfolding neutron energy spectra has been developed, based for the first time on the potential reduction interior point algorithm. This algorithm can be easily applied to neutron energy spectrum reconstruction in the recoil proton method. We transform the neutron energy spectrum unfolding problem into a typical nonnegative linear complementarity problem. The recoil proton energy spectrum and response matrix at angles of 0^o and 30^o are generated by the Geant4 simulation toolkit. Several different neutron energy test spectra are also employed. It is found that this unfolding algorithm is stable and provides efficient, accurate results. 相似文献
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基于蒙特卡罗软件Geant4,探讨质子与硅的库仑散射和核反应及中子与硅的核反应产生反冲原子沉积非电离能量的过程,建立质子和中子在硅中的非电离能量阻止本领计算方法。在此方法中,描述了原子间库仑散射的物理过程,模拟带电粒子与晶格原子之间的屏蔽库仑散射。计算得到不同能量质子和中子在硅中因库仑散射和核反应产生反冲原子的非电离能量沉积及阻止本领的等效性,计算结果与中子ASTM标准及文献计算得到的质子数据符合很好。 相似文献