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Rev Sci Instrum. 2012 Oct;83(10):10E132. doi: 10.1063/1.4742923.

A soft x-ray transmission grating imaging-spectrometer for the National Ignition Facility.

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  • 1Directorate Science and Technology, AWE Aldermaston, Reading, RG7 4PR, United Kingdom.


A soft x-ray transmission grating spectrometer has been designed for use on high energy-density physics experiments at the National Ignition Facility (NIF); coupled to one of the NIF gated x-ray detectors it records 16 time-gated spectra between 250 and 1000 eV with 100 ps temporal resolution. The trade-off between spectral and spatial resolution leads to an optimized design for measurement of emission around the peak of a 100-300 eV blackbody spectrum. Performance qualification results from the NIF, the Trident Laser Facility and vacuum ultraviolet beamline at the National Synchrotron Light Source, evidence a <100 μm spatial resolution in combination with a source-size limited spectral resolution that is <10 eV at photon energies of 300 eV.

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