Development of a two-dimensional multi-grid-type microstrip gas chamber using global-local grouping method

In this paper we propose a new type of 2D M-MSGC using multi-layer technology. In order to reduce the number of readout lines without image distortion, we introduce a new encoding scheme, the global-local grouping (GLG) method. In this approach global and local signals are used to locate the coarse and fine position information, respectively. We have designed, fabricated and tested the GLG M-MSGC plate with an active area of 10×10 cm². The results confirmed that the principal of 2D G-LG M-MSGC is successful.