Grazing incidence metal mirrors as the final elements in a laser driver for inertial confinement fusion
Grazing incidence metal mirrors (GIMMS) have been examined to replace dielectric mirrors for the final elements in a laser beam line for an inertial confinement fusion (ICF) reactor. For a laser driver using light with a wavelength from 250 to 500 nm in a 10 ns pulse, irradiated mirrors made of Al, Al alloys, or Mg were found to have calculated laser damage limits of 0.3--2.3 J/cm{sup 2} of beam energy and neutron lifetime fluence limits of over 5 {times} 10{sup 20} neutrons per square centimeter when use at grazing incidence (an angle of incidence of 85 degrees) and operated at room temperature or at 77 K. A final focusing system including mirrors made of Al alloy 7475 at room temperature or at liquid nitrogen (LN) temperatures used with a driver which delivers 5 MJ of beam energy in 32 beams would require 32 mirrors of roughly 10 m{sup 2} each. This paper briefly reviews the methods used in calculating the damage limits for GIMMs and discusses critical issues relevant to the integrity and lifetime of such mirrors in a reactor environment. 9 refs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6598129
- Report Number(s):
- UCRL-JC-103817; CONF-901007-9; ON: DE91000944
- Resource Relation:
- Conference: 9. topical meeting on technology of fusion energy, Oak Brook, IL (USA), 7-11 Oct 1990
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LASER MIRRORS
PHYSICAL RADIATION EFFECTS
DAMAGING NEUTRON FLUENCE
DIELECTRIC MATERIALS
INERTIAL CONFINEMENT
LASER FUSION REACTORS
METALS
NEUTRON TRANSPORT
CONFINEMENT
ELEMENTS
MATERIALS
MIRRORS
NEUTRAL-PARTICLE TRANSPORT
NEUTRON FLUENCE
PLASMA CONFINEMENT
RADIATION EFFECTS
RADIATION TRANSPORT
THERMONUCLEAR REACTORS
700208* - Fusion Power Plant Technology- Inertial Confinement Technology