Calibration results for first NIF Kirkpatrick-Baez microscope

Nicolai F. Brejnholt; Jay J. Ayers; Thomas J. McCarville; Tom Pardini; Louisa A. Pickworth; David K. Bradley; Todd A. Decker; Stefan P. Hau-Riege; Randal M. Hill; Michael J. Pivovaroff; Regina Soufli; Julia K. Vogel; Chris C. Walton

doi:10.1117/12.2187150

9 September 2015 Calibration results for first NIF Kirkpatrick-Baez microscope

Nicolai F. Brejnholt, Jay J. Ayers, Thomas J. McCarville, Tom Pardini, Louisa A. Pickworth, David K. Bradley, Todd A. Decker, Stefan P. Hau-Riege, Randal M. Hill, Michael J. Pivovaroff, Regina Soufli, Julia K. Vogel, Chris C. Walton

Author Affiliations +

Proceedings Volume 9591, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion IV; 95910J (2015) https://doi.org/10.1117/12.2187150
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

The Lawrence Livermore National Laboratory (LLNL) has been developing a novel X-ray imager for the National Ignition Facility (NIF) utilizing Kirkpatrick-Baez (KB) mirror geometry. A fully assembled mirror pack contains four KB optic pairs featuring cylindrical mirrors with custom-designed multilayer coatings. Multiple interchangeable mirror packs have been commissioned for various experimental campaigns, with high spatial resolution (< 5 μm) at the center of the field of view and 12× magnification.

Tight tolerances on the grazing angles of the X-ray mirrors require precision alignment and assembly of each component via a coordinate measuring machine, and a comprehensive off-line calibration of the four KB channels at X-ray wavelengths. The main goals of the calibration campaign are to measure the performance of the multilayer, validate the assembly procedure by measuring the as-built spatial resolution and determine the best object to mirror pack distance (drive depth) of the microscope for fielding at NIF. We report on the results of this effort on the first fully assembled NIF KB X-ray imager.

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Nicolai F. Brejnholt, Jay J. Ayers, Thomas J. McCarville, Tom Pardini, Louisa A. Pickworth, David K. Bradley, Todd A. Decker, Stefan P. Hau-Riege, Randal M. Hill, Michael J. Pivovaroff, Regina Soufli, Julia K. Vogel, and Chris C. Walton "Calibration results for first NIF Kirkpatrick-Baez microscope", Proc. SPIE 9591, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion IV, 95910J (9 September 2015); https://doi.org/10.1117/12.2187150

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