Mainz 2014 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
T: Fachverband Teilchenphysik
T 81: Myondetektoren 2
T 81.6: Talk
Wednesday, March 26, 2014, 18:00–18:15, P12
Understanding avalanches in a Micromegas using Single-Electron Response * Simulation aspects — •Fabian Kuger1, Rob Veenhof2, Thomas Zerguerras3, Bernard Genolini3, Miktat Imré3, Michael Josselin3, Alain Maroni3, Thi Nguyen Trung3, Joel Pouthas3, Emmanuel Rindel3, Philippe Rosier3, Daisuke Suzuki3, Lucien Séminor3, Claude Théneau3, Thomas Trefzger1, Raimund Ströhmer1, and Özkan Sahin2 — 1Julius-Maximilians-Universität Würzburg (Germany), — 2Uludag University (Turkey) — 3CNRS/IN2P3-Université Paris-Sud (France)
Micro-pattern-gaseous detectors as e.g. Micromegas are a fast developing and increasingly used technology. Accordingly there is a growing interest in an enhanced understanding of the formation process of electron avalanches. Especially the variance in electron amplification is influencing the detector performances but is rarely measured and hardly understood.
Using a Single-Electron-Response (SER) setup the variance of the electron amplification process has become experimental accessible. The huge contribution on the total ionization by energy transfer from excited states on quencher molecules (penning effect) and the impact of secondary avalanches have been estimated using Townsend based model calculations. To compare experimental gain variances with the theory driven prediction, simulations have been designed and tuned, simulating avalanche formation on microscopic electron tracking level in Garfield++. This presentation is dedicated to the simulation part.