Momentum Interchange Between Cathode-Spot Plasma Jets and Background Gases and Vapors and its Implications on Vacuum-Arc Anode-Spot Development

Raymond L. Boxman; S. Goldsmith

doi:10.1109/27.131026

Momentum Interchange Between Cathode-Spot Plasma Jets and Background Gases and Vapors and its Implications on Vacuum-Arc Anode-Spot Development

Raymond L. Boxman, S. Goldsmith

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Expressions are developed for the momentum flux density in collimated and expanding cathode-spot plasma jets by multiplying the ion flux density by the momentum carried by individual ions. Cathode spots placed in a gas background produce a hemispherical metal-vapor plasma region whose radius may be predicted by equating the plasma-jet momentum flux density with the background gas pressure. In hot anode vacuum arcs and in anode-spot vacuum arcs a vapor plume from the anode expands into the cathodic plasma. Significant expansion occurs when the anodic vapor pressure becomes comparable to the cathodic momentum flux density.

Original language	English
Pages (from-to)	231-236
Number of pages	6
Journal	IEEE Transactions on Plasma Science
Volume	18
Issue number	2
DOIs	https://doi.org/10.1109/27.131026
State	Published - Apr 1990

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title = "Momentum Interchange Between Cathode-Spot Plasma Jets and Background Gases and Vapors and its Implications on Vacuum-Arc Anode-Spot Development",

abstract = "Expressions are developed for the momentum flux density in collimated and expanding cathode-spot plasma jets by multiplying the ion flux density by the momentum carried by individual ions. Cathode spots placed in a gas background produce a hemispherical metal-vapor plasma region whose radius may be predicted by equating the plasma-jet momentum flux density with the background gas pressure. In hot anode vacuum arcs and in anode-spot vacuum arcs a vapor plume from the anode expands into the cathodic plasma. Significant expansion occurs when the anodic vapor pressure becomes comparable to the cathodic momentum flux density.",

author = "Boxman, {Raymond L.} and S. Goldsmith",

note = "Funding Information: Manuscript received July 5, 1989; revised December 7, 1989. This work was partially supported by the Foundation for Research in Electronics, Computers, and Communications, administered by the Israel Academy of Sciences and Humanities.",

year = "1990",

month = apr,

doi = "10.1109/27.131026",

language = "אנגלית",

volume = "18",

pages = "231--236",

journal = "IEEE Transactions on Plasma Science",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Momentum Interchange Between Cathode-Spot Plasma Jets and Background Gases and Vapors and its Implications on Vacuum-Arc Anode-Spot Development

AU - Boxman, Raymond L.

AU - Goldsmith, S.

N1 - Funding Information: Manuscript received July 5, 1989; revised December 7, 1989. This work was partially supported by the Foundation for Research in Electronics, Computers, and Communications, administered by the Israel Academy of Sciences and Humanities.

PY - 1990/4

Y1 - 1990/4

N2 - Expressions are developed for the momentum flux density in collimated and expanding cathode-spot plasma jets by multiplying the ion flux density by the momentum carried by individual ions. Cathode spots placed in a gas background produce a hemispherical metal-vapor plasma region whose radius may be predicted by equating the plasma-jet momentum flux density with the background gas pressure. In hot anode vacuum arcs and in anode-spot vacuum arcs a vapor plume from the anode expands into the cathodic plasma. Significant expansion occurs when the anodic vapor pressure becomes comparable to the cathodic momentum flux density.

AB - Expressions are developed for the momentum flux density in collimated and expanding cathode-spot plasma jets by multiplying the ion flux density by the momentum carried by individual ions. Cathode spots placed in a gas background produce a hemispherical metal-vapor plasma region whose radius may be predicted by equating the plasma-jet momentum flux density with the background gas pressure. In hot anode vacuum arcs and in anode-spot vacuum arcs a vapor plume from the anode expands into the cathodic plasma. Significant expansion occurs when the anodic vapor pressure becomes comparable to the cathodic momentum flux density.

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DO - 10.1109/27.131026

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VL - 18

SP - 231

EP - 236

JO - IEEE Transactions on Plasma Science

JF - IEEE Transactions on Plasma Science

SN - 0093-3813

IS - 2

ER -

Momentum Interchange Between Cathode-Spot Plasma Jets and Background Gases and Vapors and its Implications on Vacuum-Arc Anode-Spot Development

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