强激光与粒子束, 2002, 14 (4): 633, 网络出版: 2006-05-15
ICF中子示波管的实验研究
Experimental study of neutron oscillograph in ICF
中子探测 等离子体诊断 惯性约束聚变 扫描相机 示波技术 neutron detection plasma diagnostics inertial confinement fusion streak cameras oscillography
摘要
介绍了一个旨在将高时间分辨率和高探测灵敏度相结合、用于惯性约束聚变(ICF)研究的时间分辨的中子诊断技术的中子示波管,初步实验获得了技术时间分辨约40ps,可探测中子总产额108.
Abstract
This article presents an oscillograph with both high time resolution and detection efficiency used in time-resolved neutron diagnosis in ICF (inertial confinement fusion). The oscillograph, comprising a neutron cathode, a specially designed electron optical configuration and a pair of plane deflector, is similar to a streak camera in principle except that no spatial information can be obtained. A sandwich-like polyethylene-CsI-aluminium is used to convert neutron into electron beam. The electron optics system converges the electron beam excited by neutron from a wide area at the image plane. These electrons are steered transversely by a linear voltage to obtain the intensity evolution versus time. In the experiment, a neutron generator was used to test the function and the detective efficiency of the neutron cathode, resulting in a neutron beam of approximately 108 be recorded in total flux. Also an equivalence of the oscillograph with a multi-alkali photocathode was used to simulate its operation in dynamic mode by which the instrumental resolution is calibrated to be 40ps around in the proof-of-priciple experiment.
李冀, 廖华, 周军兰, 杨勤劳, 张焕文, 牛憨笨. ICF中子示波管的实验研究[J]. 强激光与粒子束, 2002, 14(4): 633. 李冀, 廖华, 周军兰, 杨勤劳, 张焕文, 牛憨笨. Experimental study of neutron oscillograph in ICF[J]. High Power Laser and Particle Beams, 2002, 14(4): 633.