Development of CCD Cameras for Soft X-ray Imaging at the National Ignition Facility

Conference · Sun Sep 01 00:00:00 EDT 2013 · Proceedings of SPIE, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion II

DOI:https://doi.org/10.1117/12.2025051· OSTI ID:1136280

Teruya, A. T. ^[1]; Palmer, N. E. ^[1]; Schneider, M. B. ^[1]; Bell, P. M. ^[1]; Sims, G. ^[2]; Toerne, K. ^[2]; Rodenburg, K. ^[2]; Croft, M. ^[2]; Haugh, M. J. ^[3]; Charest, M. R. ^[3]; Romano, E. D. ^[3]; Jacoby, K. D. ^[3]

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1. LLNL
2. Spectral Instruments
3. NSTec

The Static X-Ray Imager (SXI) is a National Ignition Facility (NIF) diagnostic that uses a CCD camera to record time-integrated 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 the target 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 format back-illuminated 2048 x 2048 CCD sensor with 24 micron pixels. Since the original sensor is no longer available, an effort was recently undertaken to build replacement cameras with suitable new sensors. Three of the new cameras use a commercially available front-illuminated CCD of similar size to the original, which has adequate sensitivity for the hard X-ray channels but not for the soft. For sensitivity below 1 keV, Lawrence Livermore National Laboratory (LLNL) had additional CCDs back-thinned and converted to back-illumination for use in the other two new cameras. In this paper we describe the 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 original cameras.

• Research Organization: Nevada Test Site (NTS), Mercury, NV (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: DE-AC52-06NA25946
• OSTI ID: 1136280
• Report Number(s): DOE/NV/25946-1888
• Journal Information: Proceedings of SPIE, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion II, Vol. 8850; Conference: SPIE 2013 Optics + Photonics, August 25-29, 2013, San Diego, CA
• Country of Publication: United States
• Language: English

Related Subjects

National Ignition Facility
X-ray diagnostic
X-ray imaging
X-ray CCD
Static X-ray Imager
X-ray quantum efficiency
Front-illuminated CCD
Back-illuminated CCD