Vacuum breakdown from electroluminescent impurities on metallic cathode surfaces

Hurley, R.E.; Dooley, P J

doi:10.1016/s0042-207x(78)80242-5

Cited by 13 publications

(2 citation statements)

References 4 publications

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“…Beside the transient processesofcharging and breakdown there is also a process of electron emission which leads explosively from a stationary stage to spot formation, like in the caseofclean surfaces. As found in recent investigations of pre-breakdown phenomena in vacuum (Hurley and Dooley, 1978;Latham, 1981; Halbritter, 19821, dielectric structures may emit field electrons with high current density already at electric fields of about IO7 V/m. Such fields exist also in the Langmuir-sheath outside the crater region.…”

Section: Spot Igxitionmentioning

confidence: 65%

On the nature of arc cathode spots in vacuum and plasmas

Jüttner

1984

Plasma Phys. Control. Fusion

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Section: Spot Igxitionmentioning

confidence: 65%

On the nature of arc cathode spots in vacuum and plasmas

Jüttner

1984

Plasma Phys. Control. Fusion

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“…These models are based on a principle analogous to the electron emission [facing page ,576) from metal-dielectric-metal structures (Yankelevitch 1980). For thick dielectric layers d = (0.1-1) pm, the electron emission is explained by the Malter effect and by the model of channel formation in the insulator (Hurley and Dooly 1978, Latham and Wilson 1981, Barengol'ts and Yankelevitch 1984, Frederickson 1983. The above-mentioned models were developed for inorganic insulator materials.…”

Section: L75mentioning

confidence: 99%

A high-voltage surface effect on dielectrics in vacuum

Anders¹,

Anders²

1986

J. Phys. D: Appl. Phys.

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Über den Gleichspannungsdurchschlag im Ultrahochvakuum

Jüttner¹,

Siemroth²

1981

Contrib Plasma Phys

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DC-breakdowns with arc-conditioned electrodes in vapour-free vacuum have been investigated with high temporal resolution. The breakdoms started always with a cathode flare, the ignition voltage of which was strongly correlated with prebreakdown field emission. The temporal development of gap plasma, discharge current and gap voltage during the breakdowns could be satisfactorily explained by the models of explosive electron emission and space-charge limited diode conduction. KO change of mechanism was observed with gap distances u p to 6 mm and voltages up to 120 kV. Generally the resistance of the discharge channel became low enough for a transition to the arc stage. However, in a few cases a self-limitation of the discharge occurred due to starvation of the material transfer from the cathode. At higher gap distances the surrounding walls had a distinct influence on the ignition of the discharges. InhaltsiibersichtMit hoher Zeitaufloaung wurden Gleichspannungsdurchschlage mit bogenformierten Elektroden in einem dampffreien Vakuum untereucht. Die Durchschlage begannen steta mit einer Katodenfackel, deren Ziindspannung stark mit der im Vordurchschlagsgebiet flieknden Feldemission korreliert war. Die zeitliche Entwicklung des Plasmas im Elektrodenzwkchenraum, des Entladungsstromes und der Entladungsspannung wiihrend der Durchschlage konnten durch die Modelle der Explosivemission und des raumladungsbegrenzten Diodenstromes zufriedenstellend erklart werden. Mit Elektrodenabstanden bis 6 mm und Spannungen b k 120 kV konnte kein Xechnnismuswechsel gefunden werden. I m allgemeinen wurde der Widerstand des Entladungskanals klein genug, um das Bogenstadium einzuleiten. Jedoch wurde auch in einigen Fallen eine Selbstbegrenzung der Entlndung gefunden, die auf unzureichende Rlaterialnachlieferung von der Katode zurlickzufdhren ist. Bei gr83eren Elektrodenabstanden hatten die umgebenden Winde einen nusgeprngten EinfluD auf die Ziindring der Entladungen.

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Vacuum breakdown from electroluminescent impurities on metallic cathode surfaces

Cited by 13 publications

References 4 publications

On the nature of arc cathode spots in vacuum and plasmas

On the nature of arc cathode spots in vacuum and plasmas

A high-voltage surface effect on dielectrics in vacuum

Über den Gleichspannungsdurchschlag im Ultrahochvakuum

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