Two-dimensional imaging triple-GEM detector with resistive anode readout

• Published in: Journal of instrumentation Vol. 12; no. 10; p. P10008
• Main Authors: Ju, X.D., Dong, M.Y., Zhao, Y.C., Zhou, C.X., Dong, J., Zhao, Y.B., Zhang, H.Y., OuYang, Q.
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 18.10.2017
• Subjects: Anodes; Channels; Electronics; Energy resolution; Nonuniformity; Sensors; Spatial resolution; X ray tubes
• ISSN: 1748-0221; 1748-0221
• DOI: 10.1088/1748-0221/12/10/P10008

The resistive anode readout facilitates a good spatial resolution with a large reduction of the electronics channels. The application of such readout method on a 100×100mm2 triple-GEM detector is presented. The detector anode covers 88×88mm2 sensitive area and consists of 11×11 resistive cells with the cell dimension of 8×8mm2. The detector has been tested by using a 55Fe source (5.9 keV) and an X-ray tube (8 keV). It is found that the spatial resolution (σ) is about 120μm with the intrinsic detector response better than 100μm. The position nonlinearity of the whole sensitive area is better than 3%. The energy resolution for 5.9 keV X rays is around 20% (FWHM) and the gain nonuniformity between different cells is better than 7%. The detector shows a quite good 2D imaging performance as well. Especially, the detector costs only half of the number of the electronics channels compared with that using the 2D strip readout.