High rate X-ray imaging using multi-GEM detectors with a novel readout design

Modern micropattern gas counters are able to detect soft X-rays with high spatial resolution. Based on the principle of gas amplification, this detector type has a wide dynamic range and provides energy selection during image reconstruction. One of the most recent developments is the Multi-GEM, an efficient, high-rate capable micropattern gas detector. Owing to the separation of gas amplification and readout stage, this detector allows high flexibility in the geometry of the readout structure. two-dimensional projective readout, GEM detectors have shown good capability in providing X-ray absorption radiographies of small mammals. We present a detector with a novel design where the readout board consists of micropads connected to three layers of strips in such a way that two-dimensional spatial reconstruction and an unambiguous resolution of events with multiple hits is possible.