GaAs - A Versatile Photoconductive Material for the Measurement of X-Rays in Pulsed Power Applications
NU-TREK POWAY CA
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We developed four types of GaAs PCDs bremsstrahlung two types, soft x-ray, and gamma for pulsed reactors. GaAs PCDs are advantageous in applications that require fast response, high dose rate, andor neutron insensitivity. Desired detector sensitivity and response were obtained through modification of carrier lifetime by neutron irradiation, size of the sensing element, and orientation of the sensing element. The GaAs PCDs were used to characterize pulsed radiation sources in over 10 different tests and the measured data from these tests are presented. GaAs PCDs E7 E11 radSis for use with pulsed bremsstrahlung sources were tested at DTRA Radiation sources, Linac Idaho Accelerator Center, Linac White Sands, Hybrid Radiation Source NRL, GAMBLE II NRL, and HERMES III Sandia. GaAs PCDs for gamma characterization in pulsed reactors E6 E7 radSis were calibrated with a Linac White Sands, checked for high dose rate E12 radSis response at HERMES III, checked for low dose rate response 5 500 radSis and stability at a Co-60 source Sandia, and checked for stability, sensitivity, and residual radioactivity at the ACCR reactor Sandia.
- Test Facilities, Equipment and Methods
- Nuclear Instrumentation
- Nuclear Physics and Elementary Particle Physics