Grazing incidence metal mirrors as the final elements in a laser driver for inertial confinement fusion

Conference · Mon Nov 19 00:00:00 EST 1990

OSTI ID:6298879

Bieri, R L; Guinan, M W

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 reactor. For a laser driver 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} 14 MeV n/cm{sup 2} (or 2.4 full power years when used in a 1000-MW reactor) when used 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 7457 at room temperature or at liquid nitrogen 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. 10 refs., 3 figs., 1 tab.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6298879
• Report Number(s): UCRL-JC-103817-Rev.1; CONF-901007-9-Rev.1; ON: DE91005272; TRN: 91-000128
• 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

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
LASER MIRRORS
PHYSICAL RADIATION EFFECTS
FOCUSING
ICF DEVICES
NEUTRON TRANSPORT
SERVICE LIFE
MIRRORS
NEUTRAL-PARTICLE TRANSPORT
RADIATION EFFECTS
RADIATION TRANSPORT
THERMONUCLEAR DEVICES
700208* - Fusion Power Plant Technology- Inertial Confinement Technology