点状中子generator的发展状况
Status of a point-like neutron generator development
摘要：
在本文中，我们报告的高电流密度离子束轮廓诊断与狭缝为基础的系统作为一种可靠的方法，能够高热负荷的应用。该任务出现在一个点状中子源的中子照相发展的框架。在以前的研究中，有人建议建立这样一个系统作为D-D中子发生器的基础上，强流气动离子源，它利用等离子体的电子回旋共振放电的强大的毫米波回旋辐射维持。该装置能够产生特征直径为1 mm的聚焦D+束，总电流超过100 mA，电流密度为几A/cm^2。研究这种强束剖面以获得最佳聚焦效率并使中子产生面积最小化似乎是一项具有挑战性的任务。本文还论证了用点状强中子发生器（中子产额在10^10 1/s水平上）进行快中子成像的可能性。
英文摘要：
In this paper we report on a high current density ion beam profile diagnostics with a slit-based system as a reliable method, capable of high thermal load applications. The task arose in frames of a point-like neutron source development for neutron radiography. In previous research, it was suggested to construct such a system as a D-D neutron generator based on the high current gasdynamic ion source, which utilises the plasma of electron cyclotron resonance discharge sustained by powerful millimeter wave gyrotron radiation. This device is able to produce focused D+ beams with a characteristic diameter of 1 mm, total current above 100 mA, and current density at a level of several A/cm^2. Study of such intense beams profile to obtain the best focusing efficiency and minimize neutron producing area appeared to be a challenging task. The paper also demonstrates the possibility of fast neutron imaging with a point-like powerful neutron generator (neutron yield on the level of 10^10 1/s).
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