Impact of GEM foil hole geometry on GEM detector gain

A. Karadzhinova; A. Nolvi; R. Veenhof; Eija Tuominen; E. Hæggström; I. Kassamakov

doi:10.1088/1748-0221/10/12/P12014

Impact of GEM foil hole geometry on GEM detector gain

A. Karadzhinova^*, A. Nolvi, R. Veenhof, Eija Tuominen, E. Hæggström, I. Kassamakov

^*Corresponding author for this work

Not published at VTT

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

8 Citations (Scopus)

Abstract

Detailed 3D imaging of Gas Electron Multiplier (GEM) foil hole geometry was realized. Scanning White Light Interferometry was used to examine six topological parameters of GEM foil holes from both sides of the foil. To study the effect of the hole geometry on detector gain, the ANSYS and Garfield ++ software were employed to simulate the GEM detector gain on the basis of SWLI data. In particular, the effective gain in a GEM foil with equally shaped holes was studied. The real GEM foil holes exhibited a 4% lower effective gain and 6% more electrons produced near the exit electrode of the GEM foil than the design anticipated. Our results indicate that the GEM foil hole geometry affects the gain performance of GEM detectors.

Original language	English
Article number	P12014
Journal	Journal of Instrumentation
Volume	10
DOIs	https://doi.org/10.1088/1748-0221/10/12/P12014
Publication status	Published - 18 Dec 2015
MoE publication type	A1 Journal article-refereed

Keywords

Control and monitor systems online
Detection of defects
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)

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title = "Impact of GEM foil hole geometry on GEM detector gain",

abstract = "Detailed 3D imaging of Gas Electron Multiplier (GEM) foil hole geometry was realized. Scanning White Light Interferometry was used to examine six topological parameters of GEM foil holes from both sides of the foil. To study the effect of the hole geometry on detector gain, the ANSYS and Garfield ++ software were employed to simulate the GEM detector gain on the basis of SWLI data. In particular, the effective gain in a GEM foil with equally shaped holes was studied. The real GEM foil holes exhibited a 4\% lower effective gain and 6\% more electrons produced near the exit electrode of the GEM foil than the design anticipated. Our results indicate that the GEM foil hole geometry affects the gain performance of GEM detectors.",

keywords = "Control and monitor systems online, Detection of defects, 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)",

author = "A. Karadzhinova and A. Nolvi and R. Veenhof and Eija Tuominen and E. H{\ae}ggstr{\"o}m and I. Kassamakov",

note = "Publisher Copyright: {\textcopyright} CERN 2015.",

year = "2015",

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doi = "10.1088/1748-0221/10/12/P12014",

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T1 - Impact of GEM foil hole geometry on GEM detector gain

AU - Karadzhinova, A.

AU - Nolvi, A.

AU - Veenhof, R.

AU - Tuominen, Eija

AU - Hæggström, E.

AU - Kassamakov, I.

N1 - Publisher Copyright: © CERN 2015.

PY - 2015/12/18

Y1 - 2015/12/18

N2 - Detailed 3D imaging of Gas Electron Multiplier (GEM) foil hole geometry was realized. Scanning White Light Interferometry was used to examine six topological parameters of GEM foil holes from both sides of the foil. To study the effect of the hole geometry on detector gain, the ANSYS and Garfield ++ software were employed to simulate the GEM detector gain on the basis of SWLI data. In particular, the effective gain in a GEM foil with equally shaped holes was studied. The real GEM foil holes exhibited a 4% lower effective gain and 6% more electrons produced near the exit electrode of the GEM foil than the design anticipated. Our results indicate that the GEM foil hole geometry affects the gain performance of GEM detectors.

AB - Detailed 3D imaging of Gas Electron Multiplier (GEM) foil hole geometry was realized. Scanning White Light Interferometry was used to examine six topological parameters of GEM foil holes from both sides of the foil. To study the effect of the hole geometry on detector gain, the ANSYS and Garfield ++ software were employed to simulate the GEM detector gain on the basis of SWLI data. In particular, the effective gain in a GEM foil with equally shaped holes was studied. The real GEM foil holes exhibited a 4% lower effective gain and 6% more electrons produced near the exit electrode of the GEM foil than the design anticipated. Our results indicate that the GEM foil hole geometry affects the gain performance of GEM detectors.

KW - Control and monitor systems online

KW - Detection of defects

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)

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DO - 10.1088/1748-0221/10/12/P12014

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SN - 1748-0221

VL - 10

JO - Journal of Instrumentation

JF - Journal of Instrumentation

M1 - P12014

ER -

Impact of GEM foil hole geometry on GEM detector gain

Abstract

Keywords

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