High-resolution gamma ray detector for process tomography


High-resolution gamma ray detector for process tomography

Hampel, U.; Bieberle, A.; Schleicher, E.; Kronenberg, J.

We developed a high-resolution gamma ray detection system and associated fast read-out electronics to image rapidly rotating multi-phase distributions in stirred chemical reactors and hydrodynamic machines. The detector arc is made of 320 small scintillation detector elements comprising LYSO scintillation crystals with an active area of 2 mm x 8 mm coupled to large area avalanche photodiodes. Pulse processing electronics is made of charge sensitive pre-amplifier, pulse shaper, gain adjustable amplifier, energy discrimination stage, and binary pulse counters. The counter stage is implemented in FPGA architecture. For fast measurements on rotating objects a fast read-out scheme with 6 bit counter depth and 40 µs read-out interval has been implemented. This enables acquisition of 500 full radiographic projections of objects rotating at 3000 rpm.

Keywords: Gamma ray tomography

  • Contribution to proceedings
    IEEE Sensors 2006, 22.-26.10.2006, Daegu, Korea
    Proceedings of IEEE Sensors 2006
  • Invited lecture (Conferences)
    IEEE Sensors 2006, 22.-26.10.2006, Daegu, Korea

Permalink: https://www.hzdr.de/publications/Publ-8877
Publ.-Id: 8877