Relating planar shock timing targets to spherical ignition capsules
Abstract
During the ignition campaign at the National Ignition Facility, we will use velocity interferometry in a planar shock timing target to set the laser pulse shape required for the ignition capsules. We will use streaked side-on radiography to relate these planar shock timing targets to the spherical capsules to fine-tune the pulse shape. Here we discuss some of the issues surrounding this fine-tuning procedure. We present simulations to indicate the differences we expect to see between planar and spherical targets, and the resolution of the streaked radiographs that will be necessary in order to carry out this program. We also discuss criteria for adjusting the pulse shape, and how many shots we might need to converge to an adequate pulse shape. This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- November 2002
- Bibcode:
- 2002APS..DPPKP1151M