Speaker
Dr
Alexadner Klyachko
Description
The development and testing of a large area high count rate position-sensitive neutron detector based on Gas Electron Multiplier (GEM) is reported. With the use of 3He:CF4 gas mixture at atmospheric pressure, the detector is anticipated to have ~50% efficiency for cold neutrons, 5-10 mm spatial resolution, and to handle up to 10^6 cm-2s-1 count rates, sufficient for intended applications with thermal and cold neutrons at IUCF Low Energy Neutron Source. A 10x10 cm2 prototype detector with a cascaded triple-GEM structure and two-dimensional crossed-strip readout electrode giving a 4x4 mm2 readout pixel size has been fabricated using industrially produced GEM foils and readout PCB. The prototype detector has been tested with electron and X-ray sources and demonstrated spatial resolution of 4 mm (single pixel). Tests of the prototype with neutron sources are on the way.This work has been supported by the National Science Foundation (under grants DMR-0220560 and DMR-0320627) and the 21st Century Science and Technology Fund of Indiana (Indiana University).
