A Gas Electron Multiplier (GEM) Detector for Fast Neutron Imaging

ORAL

Abstract

We have built a Gas Electron Multiplier (GEM) detector for detection of fast neutrons at Lawrence Berkeley National Laboratory. The detector consists of a 0.0625 inch thick polypropylene neutron converter, three GEM foils and a grid of 16 readout pads on a printed circuit board. In this talk, we present images of the GEM detector, the results of tests with $^{60}$Co, AmBe sources and our neutron beam, and a comparison between the proposed fast neutron GEM detector and a fast neutron $^{238}$U fission chamber we purchased. One of the advantages of the GEM detector over the fission chamber is the fact that it provides the x-y position information of the neutrons.

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Authors

  • C.C. Jewett

    • University of California at Berkeley

  • M. McMahan

    • Lawrence Berkeley National Laboratory

  • J. Cerny

    • University of California at Berkeley and Lawrence Berkeley National Laboratory

  • L. Heilbronn

    • Lawrence Berkeley National Laboratory

  • M. Johnson

    • Lawrence Berkeley National Laboratory