24-28 February 2020
Budker Institute of Nuclear Physics
Asia/Novosibirsk timezone

Pixelated Resistive Micromegas for Tracking Systems in High Rate environment

28 Feb 2020, 11:30
Contributed Oral Micropattern gas detectors Micropattern gas detectors


Mauro Iodice (INFN Roma Tre, Italy)


Started few years ago, the goal of this R&D project is to develop a new generation of single amplification stage resistive MPGD based on Micromegas technology with the following characteristics: stable and efficient operation up to 10 MHz/cm2 particle flows; high granularity readout with pixels (or small pads) of order mm2; fully integrated electronics; reliable and cost-effective production process. The miniaturization of the readout elements and the optimization of the spark protection system, as well as the stability and robustness under operation, are the primary challenges of the project. Several micromegas detectors have been built with similar anode planes, segmented with a matrix of 48x16 readout pads with a rectangular shape (0.8x2.8 mm2) and with a pitch of 1 and 3 mm in the two coordinates. The active surface is 4.8x4.8 cm2 with a total number of 768 channels, routed off-detector for readout. With this anode/readout layout, the spark protection resistive layer has been realized with two different techniques: a pad-patterned embedded resistor with screen printing (series-1), and a uniform DLC (Diamond Like Carbon structure) layer by sputtering (series-2). For each technique different configurations and resistivity values have been adopted. Characterization and performance studies of the detectors have been carried out by means of radioactive sources, X-Rays, and test beam. Conclusive results and a comparison of the performance obtained with the different resistive layout and different configurations are presented, in particular focusing on the response under high irradiation and high rate exposure.

Primary author

Mauro Iodice (INFN Roma Tre, Italy)


Camilla Di Donato (INFN Napoli and Università di Napoli Parthenope, Italy) Eleonora Rossi (INFN Roma Tre and Universita' di Roma Tre, Italy) Fabrizio Petrucci (INFN Roma Tre and Universita' di Roma Tre, Italy) Givi Sekhniaidze (INFN Napoli) Maria Teresa Camerlingo (Universita' di Roma Tre, INFN Roma Tre, Italy and CERN) Mariagrazia Alviggi (INFN Napoli and Universita' di Napoli Federico II, Italy) Massimo Della Pietra (INFN Napoli and Universita' di Napoli Federico II, Italy) Paolo Iengo (CERN) Vincenzo Canale (INFN Napoli and Università di Napoli Federico II, Italy)

Presentation Materials