Journal article

Publication year: 2021

Journal: Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Volume number: 997

ISSN: 0168-9002

eISSN: 1872-9576

DOI Link: https://doi.org/10.1016/j.nima.2021.165167

Publisher: Elsevier

Abstract: 
We report on the construction of a light pulser monitoring system for the electromagnetic lead tungstate (PbWO4) calorimeter of the future (P) over bar ANDA experiment at FAIR. The system consists of a high intensity LED source, an optical fibre distribution system, and a novel and compact continuous light attenuation mechanism based on LCDs allowing operation inside the magnetic field of the (P) over bar ANDA detector. The physics objectives of the (P) over bar ANDA experiment require a highly sophisticated electromagnetic calorimeter covering an energy range spanning more than three orders of magnitude. In order to perform precision measurements with this electromagnetic calorimeter based on lead tungstate crystals in the high-luminosity environment of the (P) over bar ANDA experiment, a frequent monitoring of radiation induced transmittance losses in the crystals on a level of 0.5% is required. This precision can be achieved on a day-by-day basis between regular pi(0)/eta invariant mass calibrations, performed at least once a day.

Harvard Citation style: Held, T., Albrecht, M., Erlen, T., Fink, M., Heinsius, F., Motzko, C., et al. (2021) An LED/LCD-based monitoring system for the PANDA Electromagnetic Calorimeter, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 997, Article 165167. https://doi.org/10.1016/j.nima.2021.165167

APA Citation style: Held, T., Albrecht, M., Erlen, T., Fink, M., Heinsius, F., Motzko, C., Musiol, P., Schnier, C., Steinke, M., Wenzel, H., & Wiedner, U. (2021). An LED/LCD-based monitoring system for the PANDA Electromagnetic Calorimeter. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 997, Article 165167. https://doi.org/10.1016/j.nima.2021.165167