Large-area scintillating fiber optic neutron detector using an intensified CCD camera system

Daniel T. Holslin; Anthony W. Armstrong; William K. Hagan; David Shreve; Scott T. Smith

doi:10.1117/12.185817

7 September 1994 Large-area scintillating fiber optic neutron detector using an intensified CCD camera system

Daniel T. Holslin, Anthony W. Armstrong, William K. Hagan, David Shreve, Scott T. Smith

Proceedings Volume 2281, Scintillating Fiber Technology and Applications II; (1994) https://doi.org/10.1117/12.185817
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

We have been developing and testing a scintillating fiber detector (SFD) for use as a fast neutron sensor which can discriminate against neutrons entering at angles non-parallel to the fiber axis (`directionality'). The detector/convertor component is a fiber bundle constructed of plastic scintillating fibers each measuring 10 cm long and either 0.3 mm or 0.5 mm in diameter. Extensive Monte Carlo simulations were made to optimize the bundle response to a range of fast neutron energies and to intense fluxes of high-energy gamma-rays. The bundle is coupled to a set of gamma-ray insensitive electro-optic intensifiers whose output is viewed by a CCD camera directly coupled to the intensifiers. Two types of CCD cameras were utilized: (1) a standard, interline RS-170 camera with electronic shuttering and (2) a high-speed (up to 850 frame/sec), field-transfer camera. Measurements of the neutron detection efficiency and directionality were made using 14 MeV neutrons, and the response to gamma-rays was performed using intense fluxes from radioisotopic sources (up to 20 R/hr). Recently, the detector was constructed and tested using a large 10 cm by 10 cm square fiber bundle coupled to a 10 cm diameter GEN I intensifier tube. We present a description of the current detector system and report the results of experimental tests.

Citation Download Citation

Daniel T. Holslin, Anthony W. Armstrong, William K. Hagan, David Shreve, and Scott T. Smith "Large-area scintillating fiber optic neutron detector using an intensified CCD camera system", Proc. SPIE 2281, Scintillating Fiber Technology and Applications II, (7 September 1994); https://doi.org/10.1117/12.185817

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