A technique for evaluating the Jovian entry-probe heat-shield material with a gasdynamic laserThe paper presents a technique for evaluating the Jovian entry-probe heat-shield material with a gasdynamic laser. This entry probe of Project Galileo will incorporate a forebody heat shield of carbon phenolic ablative; at the expected peak radiant intensity of 42 kW/sq cm this material can be evaluated by a CO2 gasdynamic laser. The typically quasigaussian spatial distribution of the laser output beam is converted to a spatially uniform beam by a new optical integrator; the ablation results can be related to the imposed intensity and then to the flight situation with a uniform beam. The tests show that the carbon phenolic tends to spall under intense radiation, and this process is quantified by a particle capture technique.
Document ID
19800045309
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Dickey, R. R. (NASA Ames Research Center Moffett Field, CA, United States)
Lundell, J. H. (NASA Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1979
Subject Category
Ground Support Systems And Facilities (Space)
Meeting Information
Meeting: ICIASF ''79; International Congress on Instrumentation in Aerospace Simulation Facilities