EXTERNALLY EXCITED TRAVELING PULSES IN A NEON GLOW DISCHARGE.
Abstract
Observations were made of artificially excited fluctuations in a cold cathode, neon glow discharge over a pressure range of 3.5 to 8 mm Hg and a current range of 0.1 to 2.0 ma. within this range was a region of operation free of striations. The positive column was excited with 0.2-10 microseconds pulses through a small coil wound around the positive column. Photomultiplier outputs, floating probe voltage, and samples of the discharge current were monitored on an oscilloscope. There are indications that a diffusing-impulse type disturbance with a velocity on the order of 10 to the 7th power cm/sec originates at the pulsed coil, travels toward the cathode, and initiates waves of stratification in the cathodic region. A transverse magnetic field of about 1000 gauss interupts the propagation of the fast-traveling disturbance and of the wave of stratification. Data are presented showing stratificttion group velocity, phase velocity, wavelength, and frequency as a function of pressure and current. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1964
- Accession Number
- AD0481298
Entities
People
- Lawrence J. Ratto
Organizations
- Naval Postgraduate School