THE FLUID TRANSPIRATION ARC AS A RADIATION SOURCE FOR SOLAR SIMULATION.
Semi-annual progress rept. 1 Jan 67-30 Jun 67,
COLUMBIA UNIV NEW YORK ELECTRONICS RESEARCH LABS
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The report covers progress to develop a fluid transpiration arc radiation source for solar simulation. The background of the fluid transpiration arc, including a discussion of both the cylindrical offset and conical coaxial geometries, is presented. A description of certain features that offer possibilities of improved source performance is also included. In particular, the high ionization of the FTA anode column plus the effectiveness of high velocity cathode injection to enhance brightness and inhibit cathode ablation has led to a new concept for a plasma source. This involves a colinear opposing flow geometry to generate a large stagnant zone in the arc region of maximum excitation. A preliminary successful experiment on this configuration of 1 atm. pressure is described. The report also described design and procurement of the first source of this type designed to operate at high pressures, including pressure vessel and recirculation system, as well as a complete system for radiometric and measurements. Author
- Plasma Physics and Magnetohydrodynamics