THGEM gain calculations using Garfield++: Solving discrepancies between the simulation and experimental data

Abstract

Discrepancies between the measured and simulated gain in Thick Micropatterned gaseous detectors (MPGD), namely THGEM, have been observed by several groups. In order to simulate the electron avalanches and the gain the community relies on the calculations performed in Garfield++, known to produce differences of 2 orders of magnitude in comparison to the experimental data for thick MPGDs. In this work, simulations performed for Ne/5%CH4, Ar/5%CH4 and Ar/30%CO2 mixtures shows that Garfield++ is able to perfectly describe the experimental data if Penning effect is included in the simulation. The comparison between the number of excitations which may lead to a Penning transfer, is shown for THGEM and GEM, explaining the less pronounced gain discrepancies observed in GEM.

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Cited by in corpus (7)

• First results from the NEWS-G direct dark matter search experiment at the LSM
• Gaseous and dual-phase time projection chambers for imaging rare processes
• Measurements of charging-up processes in THGEM-based particle detectors
• Simulation of gain stability of THGEM gas-avalanche particle detectors
• The Thick Gas Electron Multiplier and its derivatives: physics, technologies and applications
• Charge and Light Production in the Charge Readout System of a Dual Phase LAr TPC
• Simulation on the Transparency of Electrons and Ion Back Flow for a Time Projection Chamber based on Staggered Multiple THGEMs