A Description of the Thermal Distortion Test Facility at the Air Force Weapons Laboratory

The Thermal Distortion Test Facility at the Air Force Weapons Laboratory provides an in-house capability for obtaining interferometric measurements of laser produced thermal distortions in water-cooled mirrors of interest to the Air Force Advanced Radiation Technology program. A rastered electron be...

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Bibliographic Details
Main Authors: Callender,A B, Bloomer,Raymond H , Jr
Format: Report
Language:English
Subjects:
DISTORTION
ELECTRON BEAMS
HOLOGRAPHY
HYDROSTATIC PRESSURE
INTERFEROMETRY
LASERS
Lasers and Masers
MIRRORS
Optics
Thermal loading
THERMAL STABILITY
THERMAL STRESSES
WATER COOLING
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Description
Summary:The Thermal Distortion Test Facility at the Air Force Weapons Laboratory provides an in-house capability for obtaining interferometric measurements of laser produced thermal distortions in water-cooled mirrors of interest to the Air Force Advanced Radiation Technology program. A rastered electron beam is used to simulate the laser heating. The facility is currently testing mirrors up to 40 cm in diameter and with water flows of up to 45 GPM. Data in the form of 35-mm negatives and video tapes, are reduced to give distortion information with typically a precision of + or - 0.05 micrometer at absorbed power densities in excess of 1 kilowatt/sq cm. This report is a facility description designed in part to give the potential user a basic understanding of the system capabilities and the technical requirements which must be met to prepare for a test. (Author)