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Wired array studies are being conducted at the SNL Z accelerator to maximize the x-ray generation for inertial
confinement fusion targets and high energy density physics experiments. An integral component of these studies is the
characterization of the time-resolved spectral content of the x-rays. Due to potential spatial anisotropy in the emitted
radiation, it is also critical to diagnose the time-evolved spectral content in a space-resolved manner. To accomplish
these two measurement goals, we developed an x-ray spectrometer using a set of high-speed detectors (silicon PIN
diodes) with a collimated field-of-view that converged on a 1-cm-diameter spot at the pinch axis. Spectral
discrimination is achieved by placing high Z absorbers in front of these detectors. We built two spectrometers to permit
simultaneous different angular views of the emitted radiation. Spectral data have been acquired from recent Z shots for
the radial and axial (polar) views. UNSPEC1 has been adapted to analyze and unfold the measured data to reconstruct
the x-ray spectrum. The unfold operator code, UFO2, is being adapted for a more comprehensive spectral unfolding
treatment.
Kenneth Moy,Michael Cuneo,Ian McKenna,Thomas Keenan,Thomas Sanford, andRay Mock
"Time-resolved hard x-ray spectrometer", Proc. SPIE 6319, Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII, 63190I (11 September 2006); https://doi.org/10.1117/12.681954
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Kenneth Moy, Michael Cuneo, Ian McKenna, Thomas Keenan, Thomas Sanford, Ray Mock, "Time-resolved hard x-ray spectrometer," Proc. SPIE 6319, Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII, 63190I (11 September 2006); https://doi.org/10.1117/12.681954