Physics – Plasma Physics
Scientific paper
Nov 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aps..dppqti103k&link_type=abstract
American Physical Society, Division of Plasma Physics Meeting, November 17-21, 1997, abstract #qThpI103.
Physics
Plasma Physics
Scientific paper
The concept of isochoric fast ignition developed at LLNL by Tabak et at [1] is of importance through its potential to give higher gain than isobaric central spark ignition and thereby to relax the driver efficiency required for inertial fusion energy . The physics of fast ignition is new and challenging involving strongly relativistic laser plasma interactions and transport of energy by MeV electrons where self generated magnetic fields may strongly modify the transport . A petawatt laser beam line developed by Perry et al [ 2] at the Nova facility has recently come into operation and is being deployed in a goal oriented program to evaluate fast ignition . This laser is an order of magnitude more energetic than comparable facilities elsewhere. Theory and modeling work with PIC and fluid codes is being used to guide and interpret the experiments [1] which are emphasizing characterization of the hot electron source from Ka fluorescence of buried layers and the heating produced at depth by hot electrons from X-ray spectroscopy and fusion yield of buried layers . A related study concerns the penetration of laser radiation by hole boring in supercritical density targets . [1] M Tabak J Hammer M E Glinsky W L Kruer S C Wilks J Woodworth E M Campbell M D Perry . Ignition and high gain with Ultra powerful lasers . Phys Plasmas, 1, 1626, (1994) [2] M. D. Perry, "Crossing the Petawatt Threshold" Science & Technology Review page 4, December 1996.
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