Hard x-ray continuum crystal spectrograph for inertial confinement fusion (ICF) diagnostics
Review of Scientific Instruments, ISSN: 0034-6748, Vol: 62, Issue: 11, Page: 2709-2718
1991
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Article Description
We describe absolutely calibrated instrumentation for measuring hard x-ray continuum produced during laser irradiation of ICF targets. The instrumentation includes a crystal spectrograph and two collimated filtered scintillators. The absolutely calibrated crystal spectrograph achieves high sensitivity to x-ray continuum over the energy range of 5 to 35 keV with continuous energy coverage and a resolving power E/ΔE between 20 and 100. Time integrated spectra are recorded and stored electronically on a shot basis using two dimensional charge coupled device (CCD) camera readout of a proximity focused MCP detector close coupled to the x-ray diffracting crystals. The filtered scintillators provide discrete, time-resolved, high energy channels for recording integrated continuum in the 40-60 and 60-90 keV bands. End-to-end calibration of the crystal spectrograph was performed over the design energy interval. We discuss instrument design, calibration, and alignment and the factors affecting sensitivity and resolving power.
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