2007-02-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/682374摘要：新一代晶體量能器,要能在高輻射環境下運轉,長期監測其發光效率,極為重要. 本計畫是要建立一光學監測系統,完成長時間對晶體量能器發光效率的監測. 主要是在一黑箱中放置待測晶體,以放射源,發光二極體(LED),光二極體(PD), PIN二極體, 光電倍增管等, 搭配自製電子讀出線路,即可完成. 非常適合大學生參與,了解監測系統的架設,學會基本實驗技巧. 台大高能實驗室有研發此類系統之經驗,並有電子線路雕刻機,可提供學生相關知識及設備,讓學生能親自動手設計,製作成品,並藉由長期監測,獲取對科研有用的訓練. <br> Abstract: It is our interests to study the scintillating light spectrum from pure CsI crystal. The primary short time pulse is UV but presumably there is a long decay time component. This long time component can cause serious pile-up effect in a high rate environment. We plan to monitor this effect with LED light pulsing and hopefully can demonstrate a solution by using commercially available filters which are UV transparent and can filter out visible light. This R&D can help to reduce noise and improve energy resolution near the beampipe region. A black box will be prepared to host the CsI sample and different light sensors, e.g. the Hamamatsu PMT, stable PIN diode, photo-diode, etc., for a cross check. A light splitter is needed to deliver fixed fraction of total light to various detectors. We also need to design a simple readout board to make proper amplification, shaping, and digitization. We will use radioactive sources and reference crystals to make absolute calibration. We have the expertise to develop such system within our group. A master student or two undergraduate students can work together with our technicians to learn experience and use this R&D result to write SCI papers.量能器光學監測系統calorimeterlight monitoring system