TY - JOUR
T1 - Blocking positive ion backflow using a GEM gate
T2 - Experiment and simulations
AU - Gros, P.
AU - Fujii, K.
AU - Fusayasu, T.
AU - Kato, Y.
AU - Kawada, S.
AU - Kobayashi, M.
AU - Matsuda, T.
AU - Nitoh, O.
AU - Sugiyama, A.
AU - Takahashi, T.
AU - Tian, J.
AU - Watanabe, T.
AU - Yonamine, R.
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2013/11
Y1 - 2013/11
N2 - Positive ion feedback can be problematic in a high precision Time Projection Chamber (TPC) as proposed for the International Linear Collider (ILC). Use of a traditional wire gating device would increase the dead areas in the planned module structure. F. Sauli proposed, in 2006, the use of a Gas Electron Multiplier (GEM) as a gating device. We have measured the electron transparency for a 14 μm thick GEM in a 1 T magnetic field. The transparency does not meet the requirement for a TPC at the ILC. We performed a simulation study using Garfield++ to understand the important parameters. Simulations show that a new GEM structure with wider aperture, for example a hexagonal honeycomb structure, can improve the performance as a gate. Results of measurements will be compared to the simulation and the predicted performance of the new GEM structure will be described.
AB - Positive ion feedback can be problematic in a high precision Time Projection Chamber (TPC) as proposed for the International Linear Collider (ILC). Use of a traditional wire gating device would increase the dead areas in the planned module structure. F. Sauli proposed, in 2006, the use of a Gas Electron Multiplier (GEM) as a gating device. We have measured the electron transparency for a 14 μm thick GEM in a 1 T magnetic field. The transparency does not meet the requirement for a TPC at the ILC. We performed a simulation study using Garfield++ to understand the important parameters. Simulations show that a new GEM structure with wider aperture, for example a hexagonal honeycomb structure, can improve the performance as a gate. Results of measurements will be compared to the simulation and the predicted performance of the new GEM structure will be described.
KW - Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc)
KW - Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc)
KW - Time projection Chambers (TPC)
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U2 - 10.1088/1748-0221/8/11/C11023
DO - 10.1088/1748-0221/8/11/C11023
M3 - Article
AN - SCOPUS:84892732079
VL - 8
JO - Journal of Instrumentation
JF - Journal of Instrumentation
SN - 1748-0221
IS - 11
M1 - C11023
ER -