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Journal article
Investigation of positive and negative modes of nanosecond pulsed discharge in water and electrostriction model of initiation
Journal of physics. D, Applied physics, v 46(35), pp 355201-1-12
04 Sep 2013
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Abstract
This work investigates the development of nanosecond pulsed discharges in water ignited with the application of both positive and negative polarity pulses to submerged pin-to-plane electrodes. Optical diagnostics are used to study two main aspects of these discharges: the initiation phase, and the development phase. Nanosecond pulses up to 24 kV with 4 ns rise time, 10 ns duration and 5 ns fall time are used to ignite discharges in a 1.5 mm gap between a copper plate and a tungsten needle with radius of curvature of 25 mu m. Fast ICCD imaging is used to trace the discharge development over varying applied pulse amplitudes for both positively and negatively applied pulses to the pin electrode. The discharge is found to progress similar to that of discharges in long gaps-long sparks-in gases, both in structure and development. The more important initiation phase is investigated via schlieren transmission imaging. The region near the tip of the electrode is investigated for slightly under-breakdown conditions, and changes in the liquid's refractive index and density are observed over the duration of the applied pulse. An attempt to explain the results is made based on the electrostriction model of discharge initiation.
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Details
- Title
- Investigation of positive and negative modes of nanosecond pulsed discharge in water and electrostriction model of initiation
- Creators
- Yohan Seepersad - Drexel UniversityMikhail Pekker - Drexel UniversityMikhail N. Shneider - Princeton UniversityAlexander Fridman - Drexel UniversityDanil Dobrynin - Drexel University
- Publication Details
- Journal of physics. D, Applied physics, v 46(35), pp 355201-1-12
- Publisher
- Iop Publishing Ltd
- Number of pages
- 12
- Grant note
- DARPA-BAA-11-31 / Defense Advanced Research Projects Agency; United States Department of Defense; Defense Advanced Research Projects Agency (DARPA)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering; C. and J. Nyheim Plasma Institute; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000323303400003
- Scopus ID
- 2-s2.0-84882746416
- Other Identifier
- 991019169663404721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Physics, Applied