A Large area GEM Detector Using an improved Self-stretch Technique
  A GEM detector with an effective area of 30*30 cm2 has been constructed using an improved self-stretch technique, which enables an easy and fast GEM assembling. The design and assembling of the detector is described. Results from tests of the detector with 8 keV X-rays on effective gain and energy resolution are presented. 
Wenhao You, Yi Zhou, Cheng Li, Hongfang Chen, Ming Shao, Yongjie Sun,   Zebo Tang, Jianbei Liu
physics.ins-det hep-ex