GAS VELOCITY PROBE FOR MOVING IONIZED GASES,
Abstract
Comparison between the velocity measured by DC and AC induced fields was satisfying. The plasma jet exhibited rapid fluctuations in gas velocity as seen in both the DC and AC data. Also magnetic fields in the order of 100 gauss were found to slightly distrub the gas flow. For probes in a hot flow where a DC field is used it was found best to alternate the field between 'on' and 'off' to determine extraneous DC effects. When AC measurements are employed a field of the order of 5 gauss is all that is necessary since background 'error voltages' can be easily eliminated at this level. It is expected that flows other than plasma jets would exhibit less fluctuations at the frequency of the tuned voltage amplifier. The lowest saturation ion current obtained was 1.3 ma while the minimum current required by the measurement equipment is of order of microamps. With the use of 1.500K for tungsten probes, it was found that a few microamps did not make a measurable modification of voltage present.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1963
- Accession Number
- AD0612140
Entities
People
- Charles Cason
Organizations
- Two-phase opacification of the liver in cirrhosis