Quantitative Measurements of the Emission from High Density Nanosecond Spark Channels.
Interim scientific rept. no. 2, 1 Feb 70-31 Jan 71,
TECHNISCHE HOCHSCHULE DARMSTADT (WEST GERMANY) LEHRSTUHL FUER ANGEWANDTE PHYSIK
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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
- Electricity and Magnetism