Accession Number:

AD0614647

Title:

ATTEMPTS TO CALCULATE MOVING STRIATIONS,

Descriptive Note:

Corporate Author:

HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s):

Report Date:

1965-02-15

Pagination or Media Count:

31.0

Abstract:

An existing computer program was used in an attempt to understand moving striations. The large disparity between electron and ion mobilities and the steep fieldgradient in the cathode-fall region, often leading to negative fields, have prevented a full test of the model. However, computations indicate that the quasi-static voltage of a low-pressure, abnormal glow-discharge is a strong function of the ion distribution in the cathodefall region. This effect is equivalent to a negative resistance and thereby initiates low frequency oscillations. Higher frequency oscillations were also calculated which may correspond to observed negative striations and anode glow oscillations. Artificial striations introduced as initial conditions show that the striations move toward the cathode with a velocity somewhat greater than the ion velocity in the average field. Calculations are being continued. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE