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Title	Radiation studies on resistive bulk-micromegas chambers at the CERN Gamma Irradiation Facility
Author(s)	Alvarez Gonzalez, Barbara (CERN) ; Bortfeldt, Jonathan Frederik (CERN) ; Camerlingo, Maria Teresa (U. Naples (main) ; INFN, Naples) ; Farina, Edoardo (CERN ; U. Pavia (main) ; INFN, Pavia) ; Iengo, Paolo (CERN) ; Longo, Luigi (U. Salento, Lecce (main) ; INFN, Lecce) ; Samarati, Jerome (CERN) ; Sidiropoulou, Ourania (CERN ; U. Wurzburg (main)) ; Wotschack, Joerg (CERN)
Publication	SISSA, 2018
Number of pages	5
In:	PoS EPS-HEP2017 (2017) 477
In:	2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.477
DOI	10.22323/1.314.0477
Subject category	Detectors and Experimental Techniques
Abstract	With the growing diffusion of resistive Micromegas detectors in HEP experiments the study of long-term aging behaviour is becoming more and more relevant. Two resistive bulk-Micromegas detectors were installed in May 2015 at the CERN Gamma Irradiation Facility and exposed to an intense gamma irradiation with the aim to study the detector behavior under high irradiation and the long-term aging. The detectors have an active area of 10 × 10 cm 2 , readout strip pitch of 400 μ m , amplification gap of 128 μ m and drift gap of 5 mm. The desired accumulated charge of more than 0.2 C/cm 2 has been reached for both chambers, equivalent to 10 years of HL-LHC operation. The efficiency, amplification, and resolution of the Micromegas after this long-term irradiation period is compared with the performance of a non irradiated detector. In addition, the latest results of the measured particle rate as a function of the amplification voltage is presented and compared with those obtained in 2015.
Copyright/License	publication: (License: CC-BY-NC-ND 4.0)

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