Accession Number:

AD0643515

Title:

ON THE 'SATURATION' LUMINANCE OF HIGH-DENSITY MICROSECOND-ARC CHANNELS.

Descriptive Note:

Physical sciences research papers,

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s):

Report Date:

1966-10-01

Pagination or Media Count:

13.0

Abstract:

The emission of high-current microsecond-arc channels with a 1-mm gap has been studied in argon and helium by means of a 20-nsec Kerr-cell shutter and profiles of the relative luminance B determined from photographs of the arc image. The method is practically unaffected by instabilities in arc position, and the accuracy of relative luminance values has been perfected to a scatter smaller than plus or minus 5. From maximum values of the saturation luminance B in the axis of the arc channel observed over a wide range of arc current altered by the gas pressure, a ratio of BHeBA 1.52 for the two gases has been determined. The luminance profile across the arc channel demonstrates increasing opacity after saturation is reached. Author

Subject Categories:

  • Lasers and Masers
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE