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Physics > Instrumentation and Detectors

arXiv:2212.12364 (physics)
[Submitted on 23 Dec 2022 (v1), last revised 16 Jan 2023 (this version, v2)]

Title:The new APD-Based Readout of the Crystal Barrel Calorimeter -- An Overview

Authors:CBELSA/TAPS Collaboration: C. Honisch, P. Klassen, J. Müllers, M. Urban, F. Afzal, J. Bieling, S. Ciupka, J. Hartmann, P. Hoffmeister, M. Lang, D. Schaab, C. Schmidt, M. Steinacher, D. Walther, R. Beck, K.-T. Brinkmann, V. Crede, H. Dutz, D. Elsner, W. Erni, E. Fix, F. Frommberger, M. Grüner, T. Jude, F. Kalischewski, I. Keshelashvili, P. Krönert, B. Krusche, P. Mahlberg, V. Metag, W. Meyer, F. Müller, M. Nanova, B. Otto, L. Richter, S. Runkel, B. Salisbury, H. Schmieden, J. Schultes, T. Seifen, N. Stausberg, F. Taubert, A. Thiel, U. Thoma, G. Urff, C. Wendel, U. Wiedner, Y. Wunderlich, H.-G. Zaunick
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Abstract:The Crystal Barrel is an electromagnetic calorimeter consisting of 1380 CsI(Tl) scintillators, and is currently installed at the CBELSA/TAPS experiment where it is used to detect decay products from photoproduction of mesons. The readout of the Crystal Barrel has been upgraded in order to integrate the detector into the first level of the trigger and to increase its sensitivity for neutral final states. The new readout uses avalanche photodiodes in the front-end and a dual back-end with branches optimized for energy and time measurement, respectively. An FPGA-based cluster finder processes the whole hit pattern within less than 100 ns. The important downside of APDs -- the temperature dependence of their gain -- is handled with a temperature stabilization and a compensating bias voltage supply. Additionally, a light pulser system allows the APDs' gains to be measured during beamtimes.
Subjects: Instrumentation and Detectors (physics.ins-det); Nuclear Experiment (nucl-ex)
Cite as: arXiv:2212.12364 [physics.ins-det]
  (or arXiv:2212.12364v2 [physics.ins-det] for this version)
  https://doi.org/10.48550/arXiv.2212.12364

Submission history

From: Farah Afzal [view email]
[v1] Fri, 23 Dec 2022 14:38:40 UTC (17,583 KB)
[v2] Mon, 16 Jan 2023 10:54:50 UTC (17,583 KB)
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