Blocking positive ion backflow using a GEM gate: Experiment and simulations

P. Gros; K. Fujii; T. Fusayasu; Y. Kato; S. Kawada; M. Kobayashi; T. Matsuda; O. Nitoh; A. Sugiyama; T. Takahashi; J. Tian; T. Watanabe; R. Yonamine

doi:10.1088/1748-0221/8/11/C11023

Blocking positive ion backflow using a GEM gate: Experiment and simulations

P. Gros, K. Fujii, T. Fusayasu, Y. Kato, S. Kawada, M. Kobayashi, T. Matsuda, O. Nitoh, A. Sugiyama, T. Takahashi, J. Tian, T. Watanabe, R. Yonamine

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

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.

Original language	English
Article number	C11023
Journal	Journal of Instrumentation
Volume	8
Issue number	11
DOIs	https://doi.org/10.1088/1748-0221/8/11/C11023
Publication status	Published - 2013 Nov
Externally published	Yes

Keywords

Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc)
Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc)
Time projection Chambers (TPC)

ASJC Scopus subject areas

Mathematical Physics
Instrumentation

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10.1088/1748-0221/8/11/C11023

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title = "Blocking positive ion backflow using a GEM gate: Experiment and simulations",

abstract = "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.",

keywords = "Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc), Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc), Time projection Chambers (TPC)",

author = "P. Gros and K. Fujii and T. Fusayasu and Y. Kato and S. Kawada and M. Kobayashi and T. Matsuda and O. Nitoh and A. Sugiyama and T. Takahashi and J. Tian and T. Watanabe and R. Yonamine",

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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.

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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Blocking positive ion backflow using a GEM gate: Experiment and simulations

Abstract

Keywords

ASJC Scopus subject areas

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