Comment on “Forward current propagation beyond the virtual cathode formed by a high injection current” [Appl. Phys. Lett, <b>79</b>, 913 (2001)]

Дубинов, А. Е.; Ефимова, И. А.

doi:10.1063/1.1495884

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…The ratio depends on the electrodes spacing and the length of the drift tube. Electron beams with a virtual cathode have a diverse number of applications now [11]. The DC virtual cathode pseudo-discharge, rather than pulsed discharge, is attractive for applications like textile treatment due to its low temperature and density [12].…”

Section: Introductionmentioning

confidence: 99%

DC pseudo-glow discharge in nitrogen gas

Saudy¹

2009

Plasma Devices and Operations

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The plasma properties from a DC pseudo-discharge have been studied in low-pressure nitrogen gas. The discharge took place between a virtual cathode and a mesh anode similar to a pulsed virtual cathode oscillator or vircators. The electric potential, electric field and space charge density of the glow discharge have been obtained in the axial and radial part of the glow discharge. The location of the virtual cathode was found at around 0.7 cm from the mesh anode. The axial and radial distributions of electron temperature and ion density have been measured using a double electric probe. The electron temperature varied between 0.5 and 1.4 eV, while the ion density varied from 7 × 10 12 to 12 × 10 12 cm −3 , outside the electrodes.

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Section: Introductionmentioning

confidence: 99%

DC pseudo-glow discharge in nitrogen gas

Saudy¹

2009

Plasma Devices and Operations

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Response to “Comment on ‘Forward current propagation beyond the virtual cathode formed by a high injection current’ ” [Appl. Phys. Lett. 81, 1530 (2002)]

Uhm

Choi

2002

Applied Physics Letters

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Generalization of the Child–Langmuir law for nonzero injection velocities in a planar diode

2004

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The Child–Langmuir law relates the voltage applied across a planar diode to the saturation value JCL of current density that can be transmitted through it in case the injection velocity of electrons is zero. The Child–Langmuir current density JCL is, at the same time: (i) the maximum current density that can be transmitted through a planar diode, (ii) the current density below which the flow is steady and unidirectional in the long time limit, and (iii) the average transmitted current density for any value of injected current density above JCL. Existing generalizations of Child–Langmuir law to nonzero velocities of injection are based on the characteristics (i) and (ii) of JCL. This paper generalizes the law to nonzero velocities of injection based on the characteristic (iii) by deriving an analytical expression for the saturation value of current density. The analytical expression for the saturation current density is found to be well supported by numerical computations. A reason behind preferring the saturation property of the Child–Langmuir current density as the basis for its generalization is the importance of that property in numerical simulations of high current diode devices.

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Comment on “Forward current propagation beyond the virtual cathode formed by a high injection current” [Appl. Phys. Lett, 79, 913 (2001)]

Cited by 4 publications

References 2 publications

DC pseudo-glow discharge in nitrogen gas

DC pseudo-glow discharge in nitrogen gas

Response to “Comment on ‘Forward current propagation beyond the virtual cathode formed by a high injection current’ ” [Appl. Phys. Lett. 81, 1530 (2002)]

Generalization of the Child–Langmuir law for nonzero injection velocities in a planar diode

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