Monochromatic imaging studies of sustained metal vapor arcs burning on 150 mm diameter molten iron electrodes

摘要

Monochromatic imaging was used to investigate the excited-state density distributions of Fe and Fe(sup +) in the inter-electrode gap region of a 3,100 A dc metal vapor arc burning between molten iron surfaces in a vacuum arc furnace. Multiple images were acquired at four wavelengths. The images were corrected and Abel inverted to yield the absolute radial intensity distributions for Fe and Fe(sup +) in the inter-electrode gap region. The results show a structured, axisymmetric plasma consisting of a high density 'core' of Fe(sup +) emitters centered between the electrode surfaces situated against a relatively broad, flat excited-state Fe distribution.