Developement of high precision visualization system for high intensity particle beams

高强度粒子束高精度可视化系统研制

基本信息

批准号：
09554007
负责人：
HASHIMOTO Osamu
金额：
$ 7.04万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

The aim of the present study is to develop detector systems capable of measuring particle tracks and visualize them under high rate environment. To this end, we have(1) constructed 0.5 mm multiwire proportional chamber and investigated its performance,(2) designed and fabricated 32 ch compact preamplifier system for MWPC and,(3) fabricated 0.5 mm pitch silicon strip detector system and studied to what extent the system works under high radiation dose.We have been using 2.5 mm drift chamber for various experiments with high intensity secondary beams such as pions and kaons. However, since we are entering into the new phase that secondary particle beams with much higher beam intensity are available, it is very important to develop high resolution tracking devices. Compared with the 2.5 mm drift chamber, the 0.5 mm MWPC will have one order of magnitude less count rate per wire, thus can handle 10 times higher particle intensity. Yet, it will give us better position resolution.The 0.5 mm MWPC was tested with Ar-Isobutane gas and it was found the chamber present reasonable plateau and works quite well with the magic gas mixture.In addition, a new 32 ch preAmplifier which has twice density was developed based on 4 ch Amplifier-Shaper-Discriminator chips. It showed good performance and the high-integration read-out system is now ready for use.Furthermore, a 0.5 mm pitch SSD which are integrated with the three 48 ch-preAmp-shaper-discriminator ASIC chips has been successfully developed and it has been used as a focal plane detector system of the electron spectrometer.

本研究的目的是开发能够测量粒子轨迹并在高速率环境下将其可视化的探测器系统。为此，我们(1)构建了0.5 mm多线比例室并研究了其性能，(2)设计并制造了用于MWPC的32通道紧凑型前置放大器系统，(3)制造了0.5 mm间距硅条检测器系统并研究了其性能系统在高辐射剂量下工作的程度。我们一直使用 2.5 mm 漂移室进行各种高强度二次光束（例如π介子和Ka介子）的实验。然而，由于我们正在进入具有更高束流强度的二次粒子束的新阶段，因此开发高分辨率跟踪设备非常重要。与2.5毫米漂移室相比，0.5毫米MWPC每根线的计数率降低一个数量级，因此可以处理高10倍的颗粒强度。然而，它会给我们更好的位置分辨率。0.5毫米MWPC用Ar-异丁烷气体进行了测试，发现腔室呈现出合理的平台状态，并且与神奇气体混合物配合得很好。此外，一个新的32通道前置放大器具有双倍密度是基于 4 通道放大器-整形器-鉴别器芯片开发的。表现出良好的性能，高集成度的读出系统现已投入使用。此外，集成了三颗48通道前置放大器整形器鉴别器ASIC芯片的0.5毫米间距SSD已成功开发并已在用作电子能谱仪的焦平面检测器系统。