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Radioactive source calibration test of the CMS Hadron Endcap Calorimeter test wedge with Phase I upgrade electronics

Chatrchyan, S. and Chen, Y. and Duarte, J. and Lawhorn, J. M. and Nguyen, T. and Spiropulu, M. (2017) Radioactive source calibration test of the CMS Hadron Endcap Calorimeter test wedge with Phase I upgrade electronics. Journal of Instrumentation, 12 . Art. No. P12034. ISSN 1748-0221. doi:10.1088/1748-0221/12/12/P12034.

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The Phase I upgrade of the CMS Hadron Endcap Calorimeters consists of new photodetectors (Silicon Photomultipliers in place of Hybrid Photo-Diodes) and front-end electronics. The upgrade will eliminate the noise and the calibration drift of the Hybrid Photo-Diodes and enable the mitigation of the radiation damage of the scintillators and the wavelength shifting fibers with a larger spectral acceptance of the Silicon Photomultipliers. The upgrade also includes increased longitudinal segmentation of the calorimeter readout, which allows pile-up mitigation and recalibration due to depth-dependent radiation damage. As a realistic operational test, the responses of the Hadron Endcap Calorimeter wedges were calibrated with a ^(60)Co radioactive source with upgrade electronics. The test successfully established the procedure for future source calibrations of the Hadron Endcap Calorimeters. Here we describe the instrumentation details and the operational experiences related to the sourcing test.

Item Type:Article
Related URLs:
URLURL TypeDescription
Chen, Y.0000-0003-2582-6469
Lawhorn, J. M.0000-0002-8597-9259
Nguyen, T.0000-0003-3954-5131
Spiropulu, M.0000-0001-8172-7081
Additional Information:© 2017 CERN for the benefit of the CMS collaboration. Published by IOP Publishing Ltd on behalf of Sissa Medialab. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received: July 26, 2017; Accepted: December 6, 2017; Published: December 22, 2017.
Subject Keywords:Detector alignment and calibration methods (lasers, sources, particle-beams); Calorimeter methods; Calorimeters
Record Number:CaltechAUTHORS:20180122-101938723
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Official Citation:S. Chatrchyan et al 2017 JINST 12 P12034
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84451
Deposited By: Tony Diaz
Deposited On:23 Jan 2018 13:13
Last Modified:15 Nov 2021 20:19

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