Design and fabrication of high damage threshold turning mirrors for the Nova laser
- Lawrence Livermore National Lab., CA (USA)
- Optical Coating Lab., Inc., Santa Rosa, CA (USA)
Laser induced damage to optical components severely limits the operating fluence of high peak power lasers used for fusion research such as the Nova laser at the Lawrence Livermore National Laboratory. In particular, surfaces and optical thin films often damage at a lower fluence than bulk materials in large aperture, high quality optics. We have designed and are fabricating new 94 cm turning mirrors for Nova as part of the Precision Nova'' program to improve beam quality. A new design has been optimized for updated optical performance specifications including increased damage resistance. The new mirror design will operate at all turning angles required by the ten Nova beamlines. This flexibility reduces mirror inventory and fabrication cost. A process of conditioning'' the mirror coating has been developed that is permanent and increases the damage threshold by as much as a factor of 2--3x. 5 refs., 14 figs., 2 tabs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7155668
- Report Number(s):
- UCRL-102546; CONF-900756--6; ON: DE90012703
- Country of Publication:
- United States
- Language:
- English
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42 ENGINEERING
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440600 -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
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ALIGNMENT
COATINGS
COST
DAMAGE
FABRICATION
FILMS
FREQUENCY ANALYSIS
LASERS
LAYERS
MEASURING METHODS
MIRRORS
MODIFICATIONS
MONTE CARLO METHOD
NEODYMIUM LASERS
NOVA FACILITY
OPERATION
OPTICAL PROPERTIES
OPTIMIZATION
PERFORMANCE
PHYSICAL PROPERTIES
PULSES
REFLECTIVITY
SOLID STATE LASERS
SPECIFICATIONS
SURFACE PROPERTIES
THIN FILMS