CERN Accelerating science

ATLAS Note
Report number	ATL-LARG-PUB-2015-001
Title	Upgrade plans for the Hadronic-Endcap Calorimeter of ATLAS for the high luminosity stage of the LHC
Author(s)	Ahmadov, F (JINR, Dubna, Russia) ; Barillari, T (Max-Planck-Institut für Physik, München, Germany) ; Cheplakov, A (JINR, Dubna, Russia) ; Dominguez, R (University of Arizona, USA) ; Fischer, A (Max-Planck-Institut für Physik, München, Germany) ; Habring, J (Max-Planck-Institut für Physik, München, Germany) ; Hambarzumjan, A (Max-Planck-Institut für Physik, München, Germany) ; Javadov, N (JINR, Dubna, Russia) ; Kiryunin, A (Max-Planck-Institut für Physik, München, Germany) ; Kurchaninov, L (TRIUMF, Canada) ; Menke, S (Max-Planck-Institut für Physik, München, Germany) ; Molinas Conde, I (Max-Planck-Institut für Physik, München, Germany) ; Nagel, M (Max-Planck-Institut für Physik, München, Germany) ; Oberlack, H (Max-Planck-Institut für Physik, München, Germany) ; Reimann, O (Max-Planck-Institut für Physik, München, Germany) ; Schacht, P (Max-Planck-Institut für Physik, München, Germany) ; Strizenec, P (Slovak Academy of Science, Kosice, Slovak republic) ; Vogt, S (Max-Planck-Institut für Physik, München, Germany) ; Wichmann, G (Max-Planck-Institut für Physik, München, Germany) ; Cadabeschi, Mircea Ioan (Department of Physics, University of Toronto) ; Langstaff, Reginald Roy (TRIUMF) ; Lenckowski, Mark Stanley (University of Victoria)
Corporate Author(s)	The ATLAS collaboration
Publication	2015
Imprint	16 Jul 2015
Number of pages	38
Note	All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PUBNOTES/ATL-LARG-PUB-2015-001
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	HEC ; FCal ; Readout Electronics ; Upgrade ; Neutron Irradiation ; Proton Irradiation ; HL-LHC
Abstract	The expected increase of the instantaneous luminosity of a factor seven and of the total integrated luminosity by a factor 3-5 at the second phase of the upgraded high luminosity LHC compared to the design goals for LHC makes it necessary to re-evaluate the radiation hardness of the read-out electronics of the ATLAS Hadronic Endcap Calorimeter. The current cold electronics made of GaAs ASICs have been tested with neutron and proton beams to study their degradation under irradiation and the effect it would have on the ATLAS physics programme. New, more radiation hard technologies which could replace the current amplifiers have been studied as well: SiGe bipolar, Si CMOS FET and GaAs FET transistors have been irradiated with neutrons and protons with fluences up to ten times the total expected fluences for ten years of running of the high luminosity LHC. The performance measurements of the current read-out electronics and potential future technologies and expected performance degradations under high luminosity LHC conditions are presented.
Scientific contact person	Menke, S, ([email protected])
Copyright/License	Preprint: (License: CC-BY-4.0)