论文部分内容阅读
一 概述 国产LNA型密封中子管是由吸附氘气的钛丝、冷阴极潘宁离子源及氚靶组成,密封于高真空度圆柱形玻璃容器内。工作原理是:加热钛丝逸出氘气,在离子源中电离成氘离子,经加速到达于120kV负高压的氚靶上,由D-T反应产生能量为14MeV的快中子。控制钛丝放出的氘气量以调节离子流,从而改变中子产额。若使离子源电压脉冲化,则可同步得到脉冲中子。该中子管由于结构紧凑、携带方便、有一定的中子产额(10~8n/sec),被广泛应用于地质勘探、石油测井等各部门,也是科学研究中常用工具之一。
An overview of the domestic LNA sealed neutron tube is adsorbed deuterium titanium wire, cold cathode Penning ion source and tritium target, sealed in a high vacuum cylindrical glass container. The working principle is that the titanium wire is heated to escape deuterium gas, ionized into deuterium ions in the ion source, accelerated to reach a 120kV negative high pressure tritium target, and a fast neutron energy of 14MeV is generated from the D-T reaction. The amount of deuterium released by the titanium wire is controlled to regulate the ion flux, thereby changing the neutron yield. Pulsed neutron can be synchronized if the ion source voltage is pulsed. The neutron tube is widely used in geological exploration, oil well logging and other sectors due to its compact structure, easy carrying, and a certain neutron yield (10 ~ 8n / sec). It is also one of the commonly used tools in scientific research.