The principle and mechanism of planetary target neutron generator

Guanghua Zhang

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The principle and mechanism of planetary target neutron generator

更新时间：2022-09-13

- The principle and mechanism of planetary target neutron generator
- Nuclear Techniques Vol. 10, Issue 9, (1987)
- 作者机构：
  
  中国科学院近代物理研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：05 August 1985，
  
  Published：1987-09
- 稿件说明：
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Guanghua Zhang. The principle and mechanism of planetary target neutron generator[J]. Nuclear techniques, 1987, 10(9): 49-50,48,64.
DOI：

Guanghua Zhang. The principle and mechanism of planetary target neutron generator[J]. Nuclear techniques, 1987, 10(9): 49-50,48,64. DOI：

摘要

为了获得强中子源，用高强度氘离子束轰击固体氚钛靶产生中子时，在靶点上会产生很高的温度。目前国外均采用一个环形的氚钛靶，在水冷条件下作定轴高速旋转以提高靶相对于束流的线速度来降低靶点的温度。由于靶上各点的线速度与其回转半径成正比，靶的中心点线速度为零，所以当靶作定轴旋转时只利用了圆形靶的外面一个环带，大大地影响了靶的寿命。如：法国VALDUC中心的一个半径为34.5cm的靶，其寿命只有7小时；美国加利福尼亚大学Lawrence Livermore实验室虽在这方面作了一些改进，即其靶除作定轴旋转外，还可以作径向移动。工作时束流打在靶的某一半径上，当中子产额降至初始值的70%时，靶作径向移动，使束流打在靶的另一半径上，但这样就使靶的操纵系统复杂化，并且仍然只能利用靶的一个外环形带。本文所述的行星靶可以以其特殊的简单结构克服这一缺点。它在靶中心区仍有较高的线速度，故可以充分利用整个圆形靶面，提高靶的寿命。

Abstract

The principle and mechanism of a planetary target is presented. At present

the T-Ti target employed in neutron generators in the world can only be used on a ring shape zone because they turn around their axes and the velocity in the central region is near zero. In this design

the track which is formed by beam hitting is an abnormal cycloid that is not repeated. In this case

the central region of target has a larger velocity and full target surface can be used. So the lifetime of target is much longer.

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