Wide-range, permanent-magnet Compton spectrometer

Kenneth E. Sale; Judith E. Kammeraad

doi:10.1117/12.138599

22 December 1992 Wide-range, permanent-magnet Compton spectrometer

Kenneth E. Sale, Judith E. Kammeraad

Proceedings Volume 1734, Gamma-Ray Detectors; (1992) https://doi.org/10.1117/12.138599
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

We are using a Sm-Co based permanent magnet spectrometer to analyze Compton electrons ejected from a Be converter foil that is illuminated by a gamma-ray beam. The distance along the focal plane at which a mono-energetic electron beam entering the spectrometer will cross the focal plane is proportional to the square root of the electron momentum. This design achieves a very broad range of energies that are analyzed (from momentum of about 1 MeV/c up to 30 MeV/c) while maintaining good energy resolution (the electron momentum resolution is the larger of 0.1 MeV/c or 1% of the momentum). In addition this design has a fairly large acceptance. By restricting the angular acceptance of the spectrometer for the Compton electrons, incoming gamma ray energies and ejected electron momenta are simply related. The electron optical properties of this spectrometer are discussed as well as some aspects of the overall system design and testing.

Citation Download Citation

Kenneth E. Sale and Judith E. Kammeraad "Wide-range, permanent-magnet Compton spectrometer", Proc. SPIE 1734, Gamma-Ray Detectors, (22 December 1992); https://doi.org/10.1117/12.138599

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