Streak Camera Characterization at the OMEGA-60 Laser Facility*

We present preliminary results of the refurbishment and characterization of an x-ray streak camera used at the OMEGA Laser Facility. An x-ray streak camera collects time-resolved x-ray signal with picosecond resolution to characterize the behavior of continuous and pulsed x-ray sources, which are commonly used in high-energy-density science experiments. To repair the deflection plate pulse network, we impedance matched the coaxial divider lines with a nanosecond pulse generator and oscilloscope. We determined the best solution is a 50-50 coaxial split with Laboratory for Laser Energetics manufactured 100W semi-rigid coaxial lines. Then we measured the charge-coupled device output using two photon sources, a Hg(Ar) lamp and a 4w (~1 watt) 10 ns FWHM laser. The simulated cutoff voltage for this design is +-300V. These predicted results were then compared and confirmed with Diagnostic Ten-Inch-Manipulator tests. We used the measured deflection plate pulse and monitor trace to develop a signal processing filter, which allows for accurate deflection plate pulse reconstruction. This algorithm simulated expected signal of the monitor trace for the impedance network. A Bessel filter is applied to the monitor trace to reduce the statistical noise of the pulse. This algorithm was implemented into the shot data processing script used by the OMEGA facilities.

 

Acknowledgements

 

This work is funded by the U.S. Department of Energy NNSA Center of Excellence under cooperative agreement number DE-NA0003869.

 

This material is based upon work supported by the Department of Energy [National Nuclear Security Administration] University of Rochester “National Inertial Confinement Fusion Program” under Award Number(s) DE-NA0004144.