用于中微子质量测量的焦面探测器的台式试验

TABLE TEST OF FOCAL PLANE DETECTOR FOR NEUTRINO MASS MEASUREMENT

摘要: <正> 一、前言在我院中微子静止质量测定工作中,采用了测量β谱端点能谱的方法,在2~(1/2)π有铁双聚焦β磁谱仪的焦面上放置一单丝正比管,进行能谱测量。为了提高数据收集效率及实验精度,将单丝管变为位置灵敏探测器是必要的。国外从事同样工作的实验室,有的利用高电阻阳极丝正比管作焦面探测器,有的利用多单元正比管组合探测器。前者对于垂直象高较小的谱仪实验较为适用,而我院的β磁谱仪象高近9.6 cm,很难为它所包括。多单

Abstract: The paper discribes the structure and performance of the facal plane detec-tors for neutrino mass measurement. The detector is a MWPC with a thin window.The active area is 30×95mm~2. It can bear up 79.8 kPa pressure. The best positionresolution obtained is 365 μm for vertical incident α partical with energy 5. 3 MeV.