Speaker
Summary
We have been developing gas electron multiplier detectors (GEM) to use them as sensitive gap detectors in digital hadron calorimeters (DHCAL). As prototype detectors, so far four 30x30 cm2 double GEM detectors have been built up and the characteristics are being surveyed. One of the chambers is installed with 16-bit analog readout electronics (KPIX) and the other three with digital readout electronics (DCAL). All the chambers have been pretested with single channel readout system in order to study individual channel response to x-ray(Fe55) or other types of radiations. The response of all the chambers were studied under the irradiation of high energy particle beams (Protons, Muons, Pions etc…) at Fermi National Laboratory. In this talk, the beam test results are presented along with other test results such as analog signal test with radioactive sources or cosmic rays. Finally, our future study plans on 1x1 m2 large GEM detectors are introduced briefly.
