Neutron imaging detector based on the mu PIC micro-pixel chamber

作者：Parker J D^*; Hattori K; Fujioka H; Harada M; Iwaki S; Kabuki S; Kishimoto Y; Kubo H; Kurosawa S; Miuchi K; Nagae T; Nishimura H; Oku T; Sawano T; Shinohara T; Suzuki J; Takada A; Tanimori T; Ueno K

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2013, 697: 23-31.

DOI：10.1016/j.nima.2012.08.036

• Neutron imaging
• Gaseous detector
• Micro-pattern detector

We have developed a prototype time-resolved neutron imaging detector employing the micro-pixel chamber (mu PIC), a micro-pattern gaseous detector, coupled with a field programmable gate array-based data acquisition system for applications in neutron radiography at high-intensity neutron sources. The prototype system, with an active area of 10 x 10 cm(2) and operated at a gas pressure of 2 atm, measures both the energy deposition (via time-over-threshold) and three-dimensional track of each neutron-induced event, allowing the reconstruction of the neutron interaction point with improved accuracy. Using a simple position reconstruction algorithm, a spatial resolution of 349 +/- 36 mu m was achieved, with further improvement expected. The detailed tracking allows strong rejection of background gamma-rays, resulting in an effective gamma sensitivity of 10(-12) or less, coupled with stable, robust neutron identification. The detector also features a time resolution of 0.6 us.

• 出版日期2013-1-1