High resolution two dimensional Multi-Grid-Type MSGC using encoding method

使用编码方法的高分辨率二维多网格型MSGC

基本信息

批准号：
16360469
负责人：
TAKAHASHI Hiroruki
金额：
$ 7.87万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

项目摘要

Multi-grid-type MSGC (MicroStrip Gas Chamber) with global-local encoding method has originally been developed in this research. This detector utilizes the latest microfabrication techniques. We have implemented a new position sensing principle which enables the scale-down of the entire electronics about ten times smaller than that of the individual readout method. The proportional counters are applicable to many applications by choosing a proper gas mixture for counting, however, we have emphasized the neutron application since there has been an increasing demand in this area such as in J-PARC project. MSGCs provide very promising features in both spatial resolution and energy resolution. We have developed a position-sensitive X-ray and neutron MSGC with the new global-local grouping method. Anode pitch was selected to be about 400 um for 100mm x 100mm two dimensional detector. We have also developed a semi two-dimensional detector of 640mm long, which is also based on the global-local encoding method. The principle of the method has successfully been ensured and the position resolution of 600 um for the two dimensional detector has been demonstrated. For semi two-dimensional detectors, we have achieved an overall position resolution of -2mm using He-3 (0.5 atm) and CF4 (2 atm). Although this resolution is sufficient for most of neutron applications, the use of higher pressure gas mixture is desirable for better spatial resolution and higher detection efficiency.

本研究最初已经开发了具有全球本地编码方法的多网格型MSGC（微带气室）。该检测器利用最新的微加工技术。我们已经实施了一种新的位置传感原理，该原理可以使整个电子产品的比例比单个读取方法小约十倍。比例计数器通过选择适当的气体混合物来计算的许多应用程序，但是，我们强调了中子的应用，因为该领域的需求越来越多，例如在J-PARC项目中。 MSGC在空间分辨率和能量分辨率方面都提供了非常有希望的特征。我们使用了新的全球本地分组方法开发了一种对位置敏感的X射线和中子MSGC。对于100mm x 100mm二维检测器，选择阳极螺距约为400 um。我们还开发了一个640mm长的半二维检测器，该检测器也基于全局本地编码方法。该方法的原理已成功确保，并且已经证明了二维检测器的600 UM的位置分辨率。对于半二维探测器，我们使用HE-3（0.5 atm）和CF4（2 atm）实现了-2mm的总体位置分辨率。尽管该分辨率足以满足大多数中子应用，但希望使用较高的压力气体混合物以更好地分辨率和较高的检测效率。