Accession Number : AD0739253

Title :   Quantitative Measurements of the Emission from High Density Nanosecond Spark Channels.

Descriptive Note : Interim scientific rept. no. 2, 1 Feb 70-31 Jan 71,

Corporate Author : TECHNISCHE HOCHSCHULE DARMSTADT (WEST GERMANY) LEHRSTUHL FUER ANGEWANDTE PHYSIK

Personal Author(s) : Fischer,Heinz ; Schwanzer,Wilhelm

Report Date : DEC 1971

Pagination or Media Count : 27

Abstract : Quantitative values of the luminance and radiance at 4950 Angstrom were measured for Nanolite spark channels in the nanosecond range. The comparison standard was a crater of a low current carbon arc. Data of the Nanolite were: Capacitance, 1.35 nanofarads; Inductance, 2.1 microHenrys; Breakdown Voltage, 3.2 kilovolts; Gap, 0.65 mm; Pressure, 1 atmosphere. The maximum luminance was 20.0 watts per centimeter squared steradian Angstrom plus or minus 20 percent. The maximum radiance (at 4950 Angstrom) was 12.6 times ten to the sixth candlepower per centimeter squared, plus or minus 20 percent. Earlier observations demonstrated that the opacity in 1 atmosphere air during the current maximum is greater than 0.8. This opacity value is used to calculate the radiation temperature which was 31000 degrees Kelvin. Scaling laws are being derived for comparison with earlier observations in literature. These results compare rather well in spite of considerable simplifications used in the calculations. (Author)

Descriptors :   (*ELECTRIC DISCHARGES, LIGHT PULSES), LUMINESCENCE, GAS DISCHARGES, ELECTRIC ARCS, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE