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Title	Phase-II Upgrade of the CMS Electromagnetic Calorimeter Detector Control and Safety Systems for the High Luminosity Large Hadron Collider
Authors	R. Jiménez Estupiñán, G. Dissertori, L. Djambazov, N. Härringer, W. Lustermann, K. Stachon ETH, Zurich, Switzerland P. Adzic, D. Jovanovic, M. Mijic, P. Milenovic University of Belgrade, Belgrade, Republic of Serbia L. Cokic CERN, Meyrin, Switzerland
Abstract	The Elec­tro­mag­netic Calorime­ter (ECAL) is a sub­de­tec­tor of the CMS ex­per­i­ment. Com­posed of a bar­rel and two end­caps, ECAL uses lead tungstate scin­til­lat­ing crys­tals to mea­sure the en­ergy of elec­trons and pho­tons pro­duced in high-en­ergy col­li­sions at the Large Hadron Col­lider (LHC). The LHC will un­dergo a major up­grade dur­ing the 2026-2029 pe­riod to build the High-Lu­mi­nos­ity LHC (HL-LHC). The HL-LHC will allow for physics mea­sure­ments with one order of mag­ni­tude larger lu­mi­nos­ity dur­ing its Phase-2 op­er­a­tion. The higher lu­mi­nos­ity im­plies a dra­matic change of the en­vi­ron­men­tal con­di­tions for the de­tec­tors, which will also un­dergo a sig­nif­i­cant up­grade. The end­caps will be de­com­mis­sioned and re­placed with a new de­tec­tor. The bar­rel will be up­graded with new front-end elec­tron­ics. A Snif­fer sys­tem will be in­stalled to analyse the air­flow from within the de­tec­tor. New high volt­age and wa­ter-cooled, ra­di­a­tion tol­er­ant low volt­age power sup­plies are under de­vel­op­ment. The ECAL bar­rel safety sys­tem will re­place the ex­ist­ing one and the pre­ci­sion tem­per­a­ture mon­i­tor­ing sys­tem will be re­designed. From the con­trols point of view, the final bar­rel calorime­ter will prac­ti­cally be a new de­tec­tor. The large mod­i­fi­ca­tion of the un­der­ly­ing hard­ware and soft­ware com­po­nents will have a con­sid­er­able im­pact in the ar­chi­tec­ture of the de­tec­tor con­trol sys­tem (DCS). In this doc­u­ment the up­grade plans and the pre­lim­i­nary de­sign of the ECAL DCS to en­sure re­li­able and ef­fi­cient op­er­a­tion dur­ing the Phase-2 pe­riod are sum­ma­rized.
Funding	Swiss National Science Foundation, Switzerland; Ministry of Education, Science and Technological Development, Serbia.
Paper	download THPDP074.PDF [0.503 MB / 6 pages]
Poster	download THPDP074_POSTER.PDF [1.901 MB]
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Conference	ICALEPCS2023
Series	International Conference on Accelerator and Large Experimental Physics Control Systems (19th)
Location	Cape Town, South Africa
Date	09-13 October 2023
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Volker RW Schaa (GSI, Darmstadt, Germany); Andy Götz (ESRF, Grenoble, France); Johan Venter (SARAO, Cape Town, South Africa); Karen White (SNS, Oak Ridge, TN, USA); Marie Robichon (ESRF, Grenoble, France); Vivienne Rowland (SARAO, Cape Town, South Africa)
Online ISBN	978-3-95450-238-7
Online ISSN	2226-0358
Received	05 October 2023
Revised	10 October 2023
Accepted	13 October 2023
Issued/td>	16 October 2023
DOI	doi:10.18429/JACoW-ICALEPCS2023-THPDP074
Pages	1516-1521
Copyright	Pub­lished by JACoW Pub­lish­ing under the terms of the Cre­ative Com­mons At­tri­bu­tion 4.0 In­ter­na­tional li­cense. Any fur­ther dis­tri­b­u­tion of this work must main­tain at­tri­bu­tion to the au­thor(s), the pub­lished ar­ti­cle's title, pub­lisher, and DOI.