We present here the development of resistive Micromegas with O(mm 2 ) pad readout aiming at improving the high rate capability of the detector. The goal application is precision tracking in high rate environment without efficiency loss up to few MHz/cm 2 . In the proposed layout, small anode pads are overlayed by an insulating layer with a pattern of resistive pads on top. The readout and resistive pads are connected by intermediate resistors embedded in the insulating layer. A first prototype has been constructed at CERN and thoroughly tested. It consists of a 48x16 matrix of 0.8x2.8 mm 2 rectangular pads with a pitch of 1 and 3 mm in the two coordinates. The active surface is 4.8x4.8 cm 2 with a total number of 768 channels read-out by 6 APV-25 chips. The drift and amplification gaps of this Micromegas prototype are 5 mm and 128 mu mathrm{m}, respectively. The detector is operated with an Ar/CO2 (93:7) gas mixture. Characterization and performance studies of the detector have been carried out by means of radioactive sources, X-Rays and test beam.
Resistive Micromegas with small-pad readout: Towards a higher rate capability / Alviggi, M.; Biglietti, M.; Della Pietra, M.; Di Donato, C.; Farina, E.; Franchino, S.; Iengo, P.; Iodice, M.; Petrucci, F.; Rossi, E.; Sekhniaidze, G.; Sidiropoulou, O.; Vecchio, V.. - (2018), pp. 1-3. (Intervento presentato al convegno 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 tenutosi a Hyatt Regency, usa nel 2017) [10.1109/NSSMIC.2017.8532886].
Resistive Micromegas with small-pad readout: Towards a higher rate capability
Alviggi M.;Della Pietra M.;
2018
Abstract
We present here the development of resistive Micromegas with O(mm 2 ) pad readout aiming at improving the high rate capability of the detector. The goal application is precision tracking in high rate environment without efficiency loss up to few MHz/cm 2 . In the proposed layout, small anode pads are overlayed by an insulating layer with a pattern of resistive pads on top. The readout and resistive pads are connected by intermediate resistors embedded in the insulating layer. A first prototype has been constructed at CERN and thoroughly tested. It consists of a 48x16 matrix of 0.8x2.8 mm 2 rectangular pads with a pitch of 1 and 3 mm in the two coordinates. The active surface is 4.8x4.8 cm 2 with a total number of 768 channels read-out by 6 APV-25 chips. The drift and amplification gaps of this Micromegas prototype are 5 mm and 128 mu mathrm{m}, respectively. The detector is operated with an Ar/CO2 (93:7) gas mixture. Characterization and performance studies of the detector have been carried out by means of radioactive sources, X-Rays and test beam.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
