Author/Authors :
Parker، نويسنده , , J.D. and Hattori، نويسنده , , K. and Fujioka، نويسنده , , H. and Harada، نويسنده , , M. and Iwaki، نويسنده , , S. and Kabuki، نويسنده , , S. and Kishimoto، نويسنده , , Y. and Kubo، نويسنده , , H. and Kurosawa، نويسنده , , S. and Miuchi، نويسنده , , K. and Nagae، نويسنده , , T. and Nishimura، نويسنده , , H. and Oku، نويسنده , , T. and Sawano، نويسنده , , T. and Shinohara، نويسنده , , T. and Suzuki، نويسنده , , J. and Takada، نويسنده , , A. and Tanimori، نويسنده , , T. and Ueno، نويسنده , , K.، نويسنده ,
Abstract :
We have developed a prototype time-resolved neutron imaging detector employing the micro-pixel chamber ( μ 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 10×10 cm2 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 μ 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 μ s .
