Power loss in open cavity diodes and a modified Child-Langmuir law

Journal Article · Thu Sep 15 04:00:00 EDT 2005 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2030387· OSTI ID:20764552

Biswas, Debabrata; Kumar, Raghwendra; Puri, R R ^[1]

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1. Theoretical Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)

Diodes used in most high power devices are inherently open. It is shown that under such circumstances, there is a loss of electromagnetic radiation leading to a lower critical current as compared to closed diodes. The power loss can be incorporated in the standard Child-Langmuir framework by introducing an effective potential. The modified Child-Langmuir law can be used to predict the maximum power loss for a given plate separation and potential difference as well as the maximum transmitted current for this power loss. The effectiveness of the theory is tested numerically.

• OSTI ID: 20764552
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 12; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHARGED-PARTICLE TRANSPORT
CRITICAL CURRENT
CURRENT DENSITY
ELECTROMAGNETIC RADIATION
PLASMA
PLASMA DENSITY
PLATES
POTENTIALS
THERMIONIC DIODES