Research on track detector in hadron collider experiment

利用该资助，研究和开发了两种类型的轨道探测器，（1）光纤探测器和（2）双面硅条探测器（SSD），目的是将其用作SSC中使用的SDC探测器的端口（超导超级对撞机）实验。我们测试了各种闪烁体材料，发现一种新的波长移动器（PMP=1-苯基-3-甲基-2-吡唑啉）的输出足够大，可以用直径为30微米的光纤作为探测器的主体。然而，当光纤束在一起时，光纤之间的串扰仍然是一个有待解决的问题。硅传感器的开发在日本进行，而读出电子学的开发在美国进行。冷却系统和装配机构是双方共同的风险。我们研制的SSC探测器单元尺寸为3.4cm × 6cm × 300 μ m，具有640片间距为50 μ m的p型条带。我们要求材料厚度最小，这导致在检测器的另一侧添加n型条带，从而允许二维读出。在筑波的KEK和大坂大学的RCNP都使用梁制造和测试了许多原型。我们发现，通过在背面的n型条带之间插入p型条带，可以实现从两侧成功提取信号。在最终测试中，获得了15微米的分辨率。此外，尝试了各种材料和形状的电极，以使探测器辐射硬。最后一个样品经受了超过10^6拉德的辐射剂量。

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.