Development of a thick gas electron multiplier for microdosimetry

作者：Orchard G M^*; Chin K; Prestwich W V; Waker A J; Byun S H

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2011, 638(1): 122-126.

DOI：10.1016/j.nima.2011.01.179

• THGEM
• Thick gas electron multiplier
• Microdosimetry
• Tissue-equivalent proportional counter

A new tissue-equivalent proportional counter based on a thick gas electron multiplier (THGEM) was developed and tested for microdosimetry. A systematic test was conducted at the McMaster Accelerator Laboratory to investigate the overall performance of the prototype detector. A mixed neutron-gamma-ray radiation field was generated using the (7)Li(p,n) reaction. The detector was operated at low voltage initially to test the stability and then the relative multiplication gain was measured as a function of the operating high voltage. A drift potential of 100 V and a THGEM bias of 727 V generated a multiplication gain sufficient for the detection of both neutron and gamma-ray radiation. A consistent microdosimetric pattern was observed between the THGEM detector and standard TEPC for microdosimetry.

• 出版日期2011-5-11