Jul 1 – 6, 2013
Paraninfo buidling, Zaragoza, Spain
Europe/Zurich timezone

Performance of Glass GEM

Jul 2, 2013, 5:55 PM
25m
Aula Magna (University Paraninfo)

Aula Magna

University Paraninfo

Speaker

Takeshi Fujiwara

Description

We report first concise review on Glass GEM. Our new GEM is fabricated in totally new process with photo-etchable glass. The glass is called PEG3, the photo-etchabale glass material manufactured by HOYA-PENTAX co. ltd. With this material, we succeed in fabricating a 400 to 840µm thick GEM with Cr and Cu layer electrodes. Glass GEM enables to overcome the drawbacks of conventional polyimide GEMs, such as non-uniformity, unrobustness and the outgas from the material. With this Glass GEM, we obtained 3*10^4 gas gain with Ar/CH4 (90:10) gas, 5.9 keV (Fe-55) X-ray source. Photo-etchable glass is now commercially available from HOYA-PENTAX co. ltd. It has great characteristics for gaseous detector material such as conductivity, Young’s modulus and Volume resistivity. High enough conductivity will be a great characteristic for avoiding charge ups in high intensity counting rate. Initial gain measurements indicated satisfactory stability with high intensity X-ray beam (6Mcps/mm^2) for 12 hours operation.

Presentation materials