KTAG: The Kaon Identification Detector for CERN experiment NA62
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- 作者：J.R. Fry JRF@liverpool.ac.uk" class="auth_mail" title="E-mail the corresponding author ; On behalf of the CERN NA62 Collaboration
- 关键词：KTAG ; Cherenkov detectors ; Fast timing ; Photomultipliers
- 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
- 出版年：2016
- 出版时间：11 July 2016
- 年：2016
- 卷：824
- 期：Complete
- 页码：96-98
- 全文大小：1045 K
文摘
In the study of ultra-rare kaon decays, CERN experiment NA62 exploits an unseparated monochromatic (75 GeV/c) beam of charged particles of flux 800 MHz, of which 50 MHz are 3297&_mathId=si0001.gif&_user=111111111&_pii=S0168900215013297&_rdoc=1&_issn=01689002&md5=5f101898c5f95e1164518c91aeed4864" title="Click to view the MathML source">K+. Kaons are identified with more than 95% efficiency, a time resolution of better than 100 ps, and misidentification of less than 10−4 using KTAG, a differential, ring-focussed, Cherenkov detector. KTAG utilises 8 sets of 48 Hamamatsu PMTs, of which 32 are of type 9880 and 16 of type 7400, with signals fed directly to the differential inputs of NINO front-end boards and then to TDC cards within the TEL62 system. Leading and trailing edges of the PMT signal are digitised, enabling slewing corrections to be made, and a mean hit rate of 5 MHz per PMT is supported. The electronics is housed within a cooled and insulated Faraday cage with environmental monitoring capabilities.