ATLAS-TPX: a two-layer pixel detector setup for neutron detection and radiation field characterization

作者：Bergmann B^*; Caicedo I; Leroy C; Pospisil S; Vykydal Z

来源：Journal of Instrumentation, 2016, 11(10): P10002.

DOI：10.1088/1748-0221/11/10/P10002

• Neutron detectors (cold, thermal, fast neutrons)
• Particle identification methods
• Particle tracking detectors (Solid-state detectors)
• Solid state detectors

A two-layer pixel detector setup (ATLAS-TPX), designed for thermal and fast neutron detection and radiation field characterization is presented. It consists of two segmented silicon detectors (256 x 256 pixels, pixel pitch 55 mu m, thicknesses 300 mu m and 500 mu m) facing each other. To enhance the neutron detection efficiency a set of converter layers is inserted in between these detectors. The pixelation and the two-layer design allow a discrimination of neutrons against gamma s by pattern recognition and against charged particles by using the coincidence and anticoincidence information. The neutron conversion and detection efficiencies are measured in a thermal neutron field and fast neutron fields with energies up to 600 MeV. A Geant4 simulation model is presented, which is validated against the measured detector responses. The reliability of the coincidence and anticoincidence technique is demonstrated and possible applications of the detector setup are briefly outlined.

• 出版日期2016-10