【作者】 姚泽恩； 陈尚文； 张宇； 徐大鹏； 兰长林；

【Author】 YAO Ze-en,CHEN Shang-wen,ZHANG Yu,XU Da-peng,LAN Chang-lin (School of Nuclear Science and Technology,Lanzhou University,Lanzhou of Gansu Prov.730000,China)

【机构】 兰州大学核科学与技术学院；

【摘要】 完成了兰州大学中子发生器的技术改造。研制了2.5 kHz中频供电系统及高压直流电源,高压电源空载可达320kV;研制了新的控制系统,实现了光纤传输和计算机控制;对强流双等离子体离子源进行了技术改造,改造后的离子源灯丝寿命大于50 h;采用了伴随粒子法对中子产额进行监测。初步调试结果显示,在小固定靶室条件下,靶上氘（D）分析束流大于2 mA,束斑直径约φ20mm。采氚钛（TiT）靶对D-T中子进行了测试,在215 keV和0.3 mA氘束流条件下,D-T中子产额大于1×10⁹ s^-1。采用自注入氘钛（TiD）靶进行了D-D中子测试,在236 keV和0.3 mA氘束流条件下,D-D中子产额大于1×10⁸ s^-1。一个水冷大面积旋转靶系统正在研制中,其目标是,靶上D分析束大与10 mA,D-T中子产额大与1×10¹²s^-1,D-D中子产额大于1×10¹⁰s^-1。更多还原

【Abstract】 A technology alteration was accomplished for the neutron generstor at Lanzhou University.A 2.5kHz intermediate frequency power supplies and a Cockroft-Walto circuit with a maximum votage of 320 kV were developed.A control stand using computer was developed.The parameters of instrumentation and controls between the HV terminal and the ground were delivered by an optical fiber system.The key assemblys of duoplasmatron ion source were improved.The life-time of the filament is greater than 50 h.A associated particles measurement system was applied to monitor neutron yield. Preliminary test results show that the D beam current at the target is greater than 2 mA and the beam dot is aboutΦ20mm. D-T and D-D neutron yields are greater than 1×10⁹ s^-1 and 1×10⁸s^-1,respectively.A rotating target system is still in being developed stages.The goal is that the D beam current at the target is greater than 10mA.D-T and D-D neutron yields are greater than 1×10¹² s^-1 and 1×10¹⁰ s^-1,respectively.更多还原