CERN Accelerating science

ATLAS Note
Report number	ATL-TILECAL-PROC-2019-008
Title	Upgrade of the ATLAS Tile Calorimeter High Voltage System
Author(s)	Gomes, Agostinho (Laboratorio de Instrumenta\c{c}\~ao e Fisica Experimental de Particulas - LIP, Lisbon) ; Soares Augusto, Jose Antonio (Laboratorio de Instrumenta\c{c}\~ao e Fisica Experimental de Particulas - LIP, Lisbon) ; Evans, Guiomar (Laboratorio de Instrumenta\c{c}\~ao e Fisica Experimental de Particulas - LIP, Lisbon) ; Gurriana, Luis (Laboratorio de Instrumenta\c{c}\~ao e Fisica Experimental de Particulas - LIP, Lisbon) ; Pedro Martins, Filipe Manuel (Laboratorio de Instrumenta\c{c}\~ao e Fisica Experimental de Particulas - LIP, Lisbon)
Corporate Author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Publication	2019
Imprint	13 Oct 2019
Number of pages	5
In:	TWEPP 2019 Topical Workshop on Electronics for Particle Physics, Santiago De Compostela, Spain, 2 - 6 Sep 2019
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	tilecal ; high voltage ; upgrade
Abstract	The high voltage system of TileCal, the ATLAS central hadron calorimeter, needs to be upgraded for the HL-LHC, in the so called Phase II Upgrade. In the proposed solution for the upgrade, instead of the current location inside the detector, the HV regulation boards are deployed far from the radiation, in a room where there is permanent access for maintenance. This option requires a large number of 100 m long HV cables but removes the requirement of radiation hard boards. HVremote regulation boards have been developed and tested. Preliminary results are presented.