Neutron imaging detector based on the muPIC micro-pixel chamber

Abstract

We have developed a prototype time-resolved neutron imaging detector employing the micro-pixel chamber (muPIC), 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 10cm x 10cm and operated at a gas pressure of 2 atm, measures both the energy deposition (via time-over-threshold) and 3-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 microns 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 microseconds.

10 pages, 13 figures; accepted for publication in NIMA

References in corpus (3)

• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Development of an advanced Compton camera with gaseous TPC and scintillator
• Development of an ASD IC for the Micro Pixel Chamber

Cited by in corpus (6)

• Readout technologies for directional WIMP Dark Matter detection
• Spatial resolution of a μPIC-based neutron imaging detector
• Broadband Neutron Interferometer
• Performance test of the MAIKo active target
• Development of energy-resolved neutron imaging detectors at RADEN
• Development of the Micro Pixel Chamber with resistive electrodes