Speaker
Zhijia SUN
(Institute of High Energy Physics, CAS)
Description
A thermal neutron beam monitor with Gas Electron Multiplier (GEM) as a detector is developed to meet the needs of the next generation neutron facilities. A prototype chamber has been constructed with two 50mm x 50mm GEM foils. Enriched boron-10 is coated on one surface of aluminum cathode plate as the neutron convertor. 96 channel pads with area 4 mm x 4mm each are used for fast signal readout. In order to study the basic characteristics of boron-coated GEM detector, several irradiation tests were carried out with α source 239Pu and neutron source 241Am(Be). The signal induced by neutron has high signal-to-noise ratio. A clear image obtained from α source 239Pu is presented, which shows that the GEM-based detector has good two-dimensional imaging ability.
Primary author
Zhijia SUN
(Institute of High Energy Physics, CAS)
