Characterization of plasma expansion dynamics in a high power diode with a carbon-fiber-aluminum cathode
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- J.-C. Ju
- National University of Defense Technology 1 College of Optoelectronic Science and Engineering, , Changsha 410073, China
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- L. Liu
- National University of Defense Technology 1 College of Optoelectronic Science and Engineering, , Changsha 410073, China
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- D. Cai
- National University of Defense Technology 1 College of Optoelectronic Science and Engineering, , Changsha 410073, China
書誌事項
- 公開日
- 2014-06-09
- DOI
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- 10.1063/1.4882162
- 公開者
- AIP Publishing
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説明
<jats:p>Thermal plasma expansion is characterised during the operation of a high power diode with an explosive emission carbon-fiber-aluminum cathode driven by a 250 kV, 150 ns accelerating pulse. It is found that a quasi-stationary state of plasma expansion is obtained during the main part of the accelerating pulse and the whole plasma expansion exhibits an “U”-shape velocity evolution. A theoretical model describing the dynamics of plasma expansion is developed, which indicates that the plasma expansion velocity is determined by equilibrium between the diode current density and plasma thermal electron current density.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 104 (23), 2014-06-09
AIP Publishing