Setup Of An Experimental Platform For Study Of Resistive Anode Readout Method Used On A GEM Detector

As a new Micro Pattern Gas Detector(MPGD), GEM(Gas Electron Multiplier)has a rapid development in two decades since the invention in 1990 s because of its premium properties like good spatial resolution, highly counting rate, strong anti-radiation capability and so on. The research fields involved has developed from high energy physics to many other fields: synchrotron radiation detection, astronomy detection, medical imaging, neutron monitor and so on.With the development of high energy physics, the demand for detectors with good spatial resolution become stronger. However, when using conventional readout method like pixel or strip readout, the detector usually need a large amount of readout electronic channels to achieve a better spatial resolution, which makes the detector become cumbersome and expensive. In order to solve the problem that detectors need large amount of electronic channels to achieve good spatial resolution, researchers from all over the world never stop the explore for new readout structures and new methods. As a new readout method, resistive anode readout method can effectively reduce the number of readout electronic channel while ensuring the spatial resolution of the detector and as a result reducing the cost of build a detector.We build an experimental platform for the study of resistive anode readout method used on a GEM detector, carry on the thorough research of resistive anode readout method, optimize the design parameters of the resistive anode readout structure, the working parameters of the detector and the corresponding reconstruction algorithm.This article focuses on the explanation of the build of the experimental platform and the coding of the corresponding reconstruction program. Mainly included are design and build of the chamber of the detector, the high-voltage supply system, the readout electronic system, the DAQ system and etc. The function of the corresponding reconstruction program and the algorithm implementation are introduced as well. Subsequently, we optimized the design parameter of resistiveanode readout structure and the corresponding reconstruction algorithm via the experimental platform, studied the two-dimensional imaging performance and spatial resolution of the GEM detector using resistive anode readout method. We also studied and optimized the public trigger signal used on the GEM detector with large area resistive readout structure, provide the configuration of detector operation voltage that produce different polarity public trigger signals and reach the conclusion that the amplitude and polarity of public trigger signal are strongly related to the electric field strength of the detector’s induction area. The result will provide theoretical and experimental basis for production of large area resistive anode readout structure.Finally, THGEM detector with resistive anode readout has been tried on this experimental platform and the performance of THGEM detector has been studied. We reach the conclusion that resistive anode readout method can also be used for othe MPGD like THGEM, Micromegas and so on, which will provide a new way of readout method for MPGD.