High-speed temperature measurements on arc heated electrodes following current interruption
| Autor: | K. G. Evans, D. C. Strachan |
|---|---|
| Rok vydání: | 1974 |
| Předmět: |
Materials science
Dielectric strength Physics::Instrumentation and Detectors chemistry.chemical_element Temperature measurement Arc (geometry) Microsecond chemistry Physics::Plasma Physics Electrode Thermal Electronic engineering Electrical and Electronic Engineering Atomic physics Current (fluid) Carbon |
| Zdroj: | International Journal of Electronics. 36:655-669 |
| ISSN: | 1362-3060 0020-7217 |
| DOI: | 10.1080/00207217408900459 |
| Popis: | Measurements are reported of the temperature changes which arise at arc heated carbon electrodes when the heating current is suddenly interrupted. The use of a microsecond risetime photopyrometer reveals the presence of surface temperature decays, some several hundreds of degrees, which occur during the first hundred microseconds following interruption. Such rapid initial temperature changes are shown to be consistent with the high-temperature thermal properties of carbon, and confirm the presence, immediately behind the electrode face, of high-temperature gradients. Details of the high-speed photopyrometer, its calibration and the arc electrode measurements are presented. The importance of the fast initial decay of electrode temperature is also discussed with respect to its effect upon the simultaneous recovery of the dielectric strength of the electrode-arc-plasma interface. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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