INSTR'20

Pixelated Resistive Micromegas for Tracking Systems in High Rate environment

28 Feb 2020, 11:30

20m

Contributed Oral Micropattern gas detectors Micropattern gas detectors

Speaker

Mauro Iodice (INFN Roma Tre, Italy)

Description

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.

Presentation Materials

Slides

SmallPadMicromegas_INSTR2020_v2_150ppi.pdf