| Diagnostic acronym | Diangostic | Port location | Built and commisioned by | Description of function | Published references |
|---|---|---|---|---|---|
| FABS Q31B FABS Q36B |
Full Aperture Backscatter Station | 150-236 130-185 |
LLNL | For coherent light sources, most of the light leaving the target is back or forward scattered by stimulated Brillouin or Raman scattering. Particularly for hohlraum targets, the laser energy that is not absorbed comes back into the wedge focus lenses (WFLs) and is measured by FABS on two representative quads of the inner and outer beams (at 30 degrees and 50 degrees). | D. E. Bower el at., “Full aperture backscatter station measurement system on the National Ignition Facility.” Rev. Sci. Instrum. 75, 4177 (2004) J.D. Moody et al., “Backscatter measurements for NIF ignition targets,” Rev. Sci. Instrum. 81, 10D921 (2010). Philip Datte et al., “Operational experience with optical streak cameras at the National Ignition Facility,” Proc. SPIE. 8850, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion II, 88500G. (September 26, 2013) |
| NBI Q31B NBI Q33B NBI Q33B |
Near Backscatter Imager | 150-236 130-185 Fixed for NBI33 |
LLNL | Light is scattered in the area around the WFLs is measured by the three NBI diagnostics on representative quads: an outer cone of beams at 50 degrees and two inner cones of beams at 30 and 23.5 degrees. | J.D. Moody et al., “Backscatter measurements for NIF ignition targets,” Rev. Sci. Instrum. 81, 10D921 (2010). Philip Datte et al., “Operational experience with optical streak cameras at the National Ignition Facility,” Proc. SPIE. 8850, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion II, 88500G. (September 26, 2013) |
| SOP | Streaked Optical Pyrometer | Shared LOS 90-315 DIM | LLNL | SOP measures the breakout time of an optically emitting shock. | Robert M. Malone et al., “Combining a thermal-imaging diagnostic with an existing imaging VISAR diagnostic at the National Ignition Facility.” Proc. SPIE. 5874, Current Developments in Lens Design and Optical Engineering VI, 587409. (August 18, 2005) J. E. Miller et al., “Streaked optical pyrometer system for laser-driven shock-wave experiments on OMEGA.” Rev. Sci. Instrum. 78, 034903 (2007) |
| VISAR | Velocity Interferometer System for Any Reflector | 90-315 DIM | NSTec, LLNL | The progress of shocks through an optically transparent material is measured by VISAR. VISAR is typically used in materials properties experiments to measure shock progress through a planar target. In ignition experiments, VISAR has been successfully used for shock timing up to the beginning of the fourth shock. A variant of VISAR technique used in the ignition program employs a tiny mirror that allows simultaneous viewing of shock progress in two orthogonal directions. This is referred to as the dual-axis VISAR technique. | R.M. Malone et al, “Overview of the line-imaging VISAR diagnostic at the National Ignition Facility,” Proc. SPIE 6342 (2007). |
| GFD | Glint Fast prepulse Diagnostic | 90-315 with VISAR installed | LLNL | The Glint Fast Diode (GFD) diagnostic measures 351 nm laser light that shines on the capsule, via reflection from the hohlraum, for a fraction of a ns early in the laser drive. This glint can produce early-time imprint on the capsule that may then grow to significant shape perturbations. In addition it may provide a measure of pre-pulse at the target | J. D. Moody et al., “Hohlraum glint and laser pre-pulse detector for NIF experiments using velocity interferometer system for any reflector.” Rev. Sci. Instrum. 85, 11E608 (2014) |
| 4ω Fiducial | 4ω Fiducial | DIM 90-78 DISC | LLE, LLNL | 4ω fiducial for x-ray streak cameras for absolutely correlating the X-ray streak camera signals with respect to the laser timing. The 4w fidu is use with SPIDER and DISC | Doug Homoelle et al., “ A compact UV timing fiducial system for use with x-ray streak cameras at NIF.” Proc. SPIE. 8505, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion, 850504. (October 15, 2012) Ben Hatch et al., “Performance and operational upgrades of x-ray streak camera photocathode assemblies at NIF.” Proc. SPIE. 9211, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion III, 92110H. (September 10, 2014) |