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Research on track detector in hadron collider experiment

强子对撞机实验中径迹探测器的研究

基本信息

批准号：
03044092
负责人：
NAGASHIMA Yorikiyo
金额：
$ 4.16万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

With this grant-in-aid, research and development on two types of track detectors, (1)scintillating fiber detector and (2)double sided Silicon Strip Detector (SSD) have been carried out with the purpose of using them as port of the SDC detector to be used for SSC (Super-conducting Super Collider) experiment.We tested various scintillator materials, and found that one with a new wave length shifter (PMP=1-pheny1-3-mesity1-2-pyrazoline) has output large enough to be usable with fibers of 30 micron diameter as the main body of thedetector. However, when bundled together, cross-talks between the fibers remained a problem to be solved.SSD detector was developed jointly by US and Japanese members. Development of silicon senser was carried out in Japan while that of read out electronics was done in US. Cooling system and assembly mechanism were ventures of both sides. One unit of the SSC detector we developed has a dimension of 3.4cmX6cmx300 um with 640 pieces of p-type strips at 50 micron interval. Our requirement that the material thickness to be minimum lead to addition of n-type strips on th the other side of the detector allowing two dimensional readout. Many prototypes are made and tested using beams at both KEK at Tsukuba and RCNP at Osaka University. We found successful extraction of signals from both sides can be achieved by inserting p-type strips between n-type strips at the back side. In the final test, the resolution of 15 microns was obtained. Moreover, various materials and shapes of electrodes are tried to make the detector radiation hard. The final sample endured radiation dose of over 10^6 rads.

利用这一助学金，对两种径迹探测器进行了研究和开发，(1)闪烁光纤探测器和(2)双面硅片探测器(SSD)，目的是将它们作为SDC探测器的端口，用于超导超级对撞机(SSC)实验。我们测试了各种闪烁材料，发现带有新型波长移位器(PMP=1-苯基-3-介质体-1-2-吡唑啉)的闪烁体材料的输出足够大，可以用直径30微米的光纤作为探测器主体。然而，当捆绑在一起时，纤维之间的串扰仍然是一个有待解决的问题。SSD探测器是由美国和日本成员联合开发的。硅传感器的开发是在日本进行的，而读出电子学的开发是在美国进行的。冷却系统和装配机构是双方的合资企业。我们研制的SSC探测器的一个单元的尺寸为3.4cmx6cmx300um，具有640片间隔为50微米的p型条带。我们要求材料厚度最小，这导致在探测器的另一侧增加了n型条带，从而允许二维读出。许多原型都是在筑波的KEK和大阪大学的RCNP使用横梁制造和测试的。我们发现，通过在背面的n型条之间插入p型条，可以成功地从两侧提取信号。在最终的测试中，获得了15微米的分辨率。此外，还尝试了各种材料和形状的电极，以使探测器的辐射变得坚硬。最终样品经受了超过10^6拉德的辐射剂量。