Abstract
The spectrum of an ablation-stabilized arc has been recorded using ice as the test material. The intensity of neutral oxygen lines was found to reach the blackbody radiation limit and subsequently the temperature of the vapour layer was determined by the Planck function. The arc diameter, pressure at stagnation point, arc column temperature and vapour temperature were measured by spectroscopic methods. The results are in agreement with those of Kovitya and Lowke (1984) for a two-zone, isothermal arc model.
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