Measurements of temporal and spatial characteristics of electrohydrodynamic instabilities
| Autor: | Joseph Ray Woodworth, Arian L. Pregenzer |
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| Rok vydání: | 1989 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 65:1823-1828 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.342915 |
| Popis: | Since an electrohydrodynamically (EHD) driven liquid‐lithium ion source is being developed for experiments on the Particle Beam Fusion Accelerator II at Sandia National Laboratories, EHD experiments have been started with several liquids. In this paper, we present results of experimental studies of the behavior of the surface of water and ethanol in the presence of 15–40‐kV/cm dc electric fields. Fields of this magnitude can produce unstable growth of surface perturbations with wavelengths in the 0.1–1.0 cm range. There is excellent agreement between theory and experiment for values of the wavelength of the dominant mode as a function of the applied electric field E0. Theoretical predictions about the temporal behavior of cusp formation are consistent with experiment. The experimental results are applicable, via scaling laws, to liquids in the presence of electric fields in the 1–50 MV/cm range, where unstable surface perturbations may produce field enhancements sufficient to field evaporate ions from the... |
| Databáze: | OpenAIRE |
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