20 January 2004 Collimated step-wedge spectrometer for flash x-ray radiography sources
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Abstract
High-current pulsed bremsstrahlung X-ray sources with endpoint energies in the 100 keV to 1 MeV regime are commonly used to radiograph dynamic events. Knowledge of the output spectra can assist in both improving these sources and in analyzing the imagery. Consequently, we have begun developing a spectrometer for this regime, which we refer to as the Collimated Step-wedge Spectrometer (CSS). It is based on a set of severl input channels, each comprising a collimator, X-ray filter, and scintillator. The scintillation light from all channels is recorded in a single from of a high-S/N CCD camera. Knowledge of the filters' attentuation and the scintillator's spectral response should allow unfolding an X-ray spectrum. An Initial test was performed with a bremstrahlung source of 300 keV endpoint energy, but with a non-optimal filter set.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fletcher J. Goldin, Stephen E. Mitchell, "Collimated step-wedge spectrometer for flash x-ray radiography sources", Proc. SPIE 5198, Hard X-Ray and Gamma-Ray Detector Physics V, (20 January 2004); doi: 10.1117/12.503868; https://doi.org/10.1117/12.503868
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