Development of CCD cameras for soft x-ray imaging at the National Ignition Facility

A. T. Teruya; N. E. Palmer; M. B. Schneider; P. M. Bell; G. Sims; K. Toerne; K. Rodenburg; M. Croft; M. J. Haugh; M. R. Charest; E. D. Romano; K. D. Jacoby

doi:10.1117/12.2025051

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26 September 2013 Development of CCD cameras for soft x-ray imaging at the National Ignition Facility

A. T. Teruya, N. E. Palmer, M. B. Schneider, P. M. Bell, G. Sims, K. Toerne, K. Rodenburg, M. Croft, M. J. Haugh, M. R. Charest, E. D. Romano, K. D. Jacoby

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Proceedings Volume 8850, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion II; 885008 (2013) https://doi.org/10.1117/12.2025051
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

The Static X-Ray Imager (SXI) is a National Ignition Facility (NIF) diagnostic that uses a CCDcamera to record timeintegrated X-ray images of target features such as the laser entrance hole of hohlraums. SXI has two dedicated positioners on the NIF target chamber for viewing thetarget from above and below, and the X-ray energies of interest are 870 eV for the “soft” channel and 3 – 5 keV for the “hard” channels. The original cameras utilize a large formatbackilluminated 2048 x 2048 CCD sensor with 24 micron pixels. Since the original sensor isno longer available, an effort was recently undertaken to build replacement cameras withsuitable new sensors. Three of the new cameras use a commercially available front-illuminatedCCD of similar size to the original, which has adequate sensitivity for the hard X-ray channelsbut not for the soft. For sensitivity below 1 keV, Lawrence Livermore National Laboratory (LLNL) had additional CCDs back-thinned andconverted to back-illumination for use in the other two new cameras. In this paper we describethe characteristics of the new cameras and present performance data (quantum efficiency, flat field, and dynamic range) for the front- and back-illuminated cameras, with comparisons to the originalcameras.

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A. T. Teruya, N. E. Palmer, M. B. Schneider, P. M. Bell, G. Sims, K. Toerne, K. Rodenburg, M. Croft, M. J. Haugh, M. R. Charest, E. D. Romano, and K. D. Jacoby "Development of CCD cameras for soft x-ray imaging at the National Ignition Facility", Proc. SPIE 8850, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion II, 885008 (26 September 2013); https://doi.org/10.1117/12.2025051

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