The importance of contamination in arc initiation on stainless steel exposed to a toroidal discharge

Maskrey, J.T.; Dugdale, R.A.

doi:10.1016/0022-3115(63)90059-x

Cited by 18 publications

(2 citation statements)

References 4 publications

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“…This device is depicted in Fig 1, 2 -main electrodes, 3 -trigger electrode, 4 -dielectric, 5 -mica sheet, 6 -glass cylinder, 7 -vacuum flange, 8 -capacitor (0.5 pF), 9 -discharging resistor Rd (0 or 2 Q), 10 -charging resistor, 11 -generator of gun voltage (2 to 5 kV), 12 -trigger generator by the dielectric 4. The capacitor was charged to a high voltage V, (2-5 kV) which could be positive or negative.…”

Section: The Plasma Gunmentioning

confidence: 99%

Initiation and Sustainment of Unipolar Arc Discharges by a Microsecond Pulse Plasma

Иванов

Jüttner²,

Pursch³

et al. 1983

Contrib Plasma Phys

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Plasma temperature T,, density n( and potential (with respect to ground) were controlled in the limits 7-12 eV, 1O1*--1O1@ m4, 20-40 V, respectively, and the influence of these parameters on arc current amplitude (50-500 A) and ignition probability has been investigated. It was found that the ignition is the most limiting proceaa requiring surface contaminations as well as the transport of net currents to the surface. The amplitude of the current was proportional to n,Te1I

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Section: The Plasma Gunmentioning

confidence: 99%

Initiation and Sustainment of Unipolar Arc Discharges by a Microsecond Pulse Plasma

Иванов

Jüttner²,

Pursch³

et al. 1983

Contrib Plasma Phys

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“…Primary effects like vacuum field emission or emission from dielectric layers may be responsible for the desorption. Maskrey and Dugdale [27] postulated that arc ignition might be preceded by a puff of vapour. Similarly, Mioduszewsky [28] explains the influence of organic contaminants by the ignition of glow discharges after their desorption.…”

Section: Pre-arcing Dischargesmentioning

confidence: 99%

Relevance of plasma-induced arcs for divertor tokamaks

Ertl

ASDEX-Team²,

Juettner³

1985

Nucl. Fusion

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Plasma-induced arcs and their ignition conditions have been studied in the divertor chamber of the ASDEX tokamak by introducing arc probes and Langmuir probes in front of the divertor plates. Arcs are rare events and are always correlated with unstable phases of the plasma, such as at disruptions or during neutral-beam injection. Arcs require high ignition potentials (100-500 V) and burning voltages of the order of 100 V. In addition, an internal limitation of the rate of current rise to values of about lO'A'S^has been observed. The probability of arcing during short transient voltages is thus reduced. Arcs are generally preceded by diffuse discharges carrying currents of a few amperes. Since diffuse discharges occur more frequently than arcing events, a significant contribution of diffuse discharges to surface erosion is suspected.

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Unipolar Arcs. Experimental and Theoretical Study

Beilis

2020

Plasma and Spot Phenomena in Electrical Arcs

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The importance of contamination in arc initiation on stainless steel exposed to a toroidal discharge

Cited by 18 publications

References 4 publications

Initiation and Sustainment of Unipolar Arc Discharges by a Microsecond Pulse Plasma

Initiation and Sustainment of Unipolar Arc Discharges by a Microsecond Pulse Plasma

Relevance of plasma-induced arcs for divertor tokamaks

Unipolar Arcs. Experimental and Theoretical Study

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