Micromegas prototypes with thermo-bond film separators

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GUAN Liang, TANG Hao-Hui, GUO Jun-Jun, WANG Xiao-Lian, XU Zi-Zong and ZHAO Tian-Chi. Micromegas prototypes with thermo-bond film separators[J]. Chinese Physics C, 2011, 35(2): 163-168. doi: 10.1088/1674-1137/35/2/011
GUAN Liang, TANG Hao-Hui, GUO Jun-Jun, WANG Xiao-Lian, XU Zi-Zong and ZHAO Tian-Chi. Micromegas prototypes with thermo-bond film separators[J]. Chinese Physics C, 2011, 35(2): 163-168.  doi: 10.1088/1674-1137/35/2/011 shu
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Received: 2010-05-17
Revised: 2010-06-02
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Micromegas prototypes with thermo-bond film separators

Abstract: In this paper we report the results of Micromegas prototypes constructed by attaching micromesh to an anode using thermo-bond films. The excellent metal attaching ability and good dielectical property of this kind of film make it a promising material to be used as avalanche gap spacers. Several prototypes are successfully made. The electron transmission properties are first studied and then the gas gain is measured in argon-isobutane mixtures. The maximum gain of more than 104 is easily obtained. The energy resolutions for 55Fe 5.9 keV Kα ray can be better than 20% over one magnitude in gain for different operational gas mixtures and the best energy resolution of 13.7% (FWHM) can be achieved with the gas mixture of 94% argon concentration. The preliminary test results of the prototypes with sensitive area of 45 mm×45 mm without internal support show good uniformity across the sensitive area.

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