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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.

本研究首次提出了一种采用全局-局部编码的多网格型微带气室（MSGC）。该探测器采用了最新的微加工技术。我们已经实现了一种新的位置传感原理，它使整个电子设备的比例缩小约十倍小于单个读出方法。通过选择适当的气体混合物进行计数，比例计数器适用于许多应用，但是，我们强调了中子应用，因为在这一领域的需求不断增加，例如在J-PARC项目中。MSGCs在空间分辨率和能量分辨率方面都提供了非常有前途的功能。我们采用新的全局-局部分组方法开发了位置敏感X射线和中子MSGC。对于100 mm X 100 mm二维检测器，阳极节距被选择为约400 μ π ι。我们还开发了一个640 mm长的半二维探测器，它也是基于全局-局部编码方法。该方法的原理已得到证实，二维探测器的位置分辨率已达到600 μ m。对于半二维探测器，我们已经实现了使用He-3（0.5大气压）和CF 4（2大气压）的整体位置分辨率为~ 2 mm。虽然这种分辨率对于大多数中子应用是足够的，但是为了获得更好的空间分辨率和更高的探测效率，需要使用更高压力的气体混合物。