Highly doped ruby filters for stray light reduction in SCATPAK II
One of the major problems in Thomson scattering measurement of electron temperature is the suppression of stray light. Filters of AR-coated ruby with a high-percentage doping of Cr have been produced for use on SCATPAK II. The filters have negligible attenuation of the signal above 7000 A-circle and attenuate light at the laser line by a factor of approx. =9. Experimental details of the filter performance, design, and fabrication are presented. The filter performance is compared with experimental measurements of the Cr-in-sapphire absorption cross section at the R-italic/sub 1/ line. Ruby filters present a cost-effective method of stray light suppression for experiments using ruby lasers and the red-shifted portion of the scattered spectrum.
- Research Organization:
- Fusion Energy Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5565387
- Journal Information:
- Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 57:8; ISSN RSINA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CORUNDUM
DESIGN
ELECTRON TEMPERATURE
FABRICATION
FILTERS
INELASTIC SCATTERING
LIGHT SCATTERING
MINERALS
OPTICAL FILTERS
OPTICAL PROPERTIES
OPTICAL REFLECTION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PHYSICAL PROPERTIES
PLASMA DIAGNOSTICS
REFLECTION
REFLECTIVITY
RUBY
SCATTERING
SURFACE PROPERTIES
THOMSON SCATTERING