Cathode processes in free burning and stabilized by axial magnetic field vacuum arcs

Chaly, A.M.; Logatchev, A.A.; Shkol'nik, D.M.

doi:10.1109/deiv.1998.740621

Cited by 3 publications

(5 citation statements)

References 12 publications

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“…The qualitative model of phenomenon under discussion derived from the this idea was proposed in [ 5 ] .…”

Section: Ratio Il(dmax)2 Does Not Depend On I In Othermentioning

confidence: 99%

“…The phenomenon of normal current density was quantitatively investigated for the first time in [5], but in relatively narrow current range. In previous literature we found one work [7] where it was only mentioned that the cathode root of vacuum arc subjected to AMF had a tendency to increase roughly proportional to arc current.…”

Section: Ratio Il(dmax)2 Does Not Depend On I In Othermentioning

confidence: 99%

“…AMF affects the discharge characteristics through the mediation of the AMF on the dynamics of CS's. Let's discuss this topic in more detail following [5].…”

mentioning

confidence: 99%

“…The application of AMF stabilized relatively long HCVA (h-lOmm), suppresses a formation of the group of CS's in short HCVA (h-lmm) [5], and changes arcing voltage (here h is a gap length). The dependency of the voltage U on the AMF induction B at a certain fixed current I is V-shaped.…”

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confidence: 99%

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Current density on the cathode of high current vacuum arc stabilized by axial magnetic field

Chaly¹,

Logatchev²,

Shkol'nik³

et al.

Proceedings ISDEIV. 19th International Symposium on Discharges and Electrical Insulation in Vacuum (Cat. No.00CH37041)

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Current density distribution over the cathode of high-current vacuum arc (HCVA) stabilized by axial magnetic field (AMF) was analyzed and mean values were found. Results obtained proved previously discovered phenomenon of normal current density in cathode root of HCVA stabilized by AMF to be of general phenomenon under changes of arc parameters in a wide range. This normal current density depends on AMF intensity and on arc length,'and does not depends on current. It was also discovered that inside cathode arc root, cathode spots form a characteristic structure.

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“…The qualitative model of phenomenon under discussion derived from the this idea was proposed in [ 5 ] .…”

Section: Ratio Il(dmax)2 Does Not Depend On I In Othermentioning

confidence: 99%

Section: Ratio Il(dmax)2 Does Not Depend On I In Othermentioning

confidence: 99%

“…AMF affects the discharge characteristics through the mediation of the AMF on the dynamics of CS's. Let's discuss this topic in more detail following [5].…”

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Current density on the cathode of high current vacuum arc stabilized by axial magnetic field

Chaly¹,

Logatchev²,

Shkol'nik³

et al.

Proceedings ISDEIV. 19th International Symposium on Discharges and Electrical Insulation in Vacuum (Cat. No.00CH37041)

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“…For high currents of many kiloamps, researchers have divided the visual appearance of the arc into a series of modes. These modes are a function of the appearance of the visible light emissions from the cathode [1], anode [2], and/or inter-contact plasma [3,4]. The evolution between modes often indicates important changes in the plasma behavior and contact melting.…”

Section: Introductionmentioning

confidence: 97%

Visual measurements of plasma arc modes in a high-current vacuum arc with an axial magnetic field [electrical contacts]

Taylor

Proceedings of the Forty-Ninth IEEE Holm Conference on Electrical Contacts, 2003.

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The use of high-speed cameras to record the optical light emissions from arcing on electrical contacts provided valuable information on the behavior and mode of the vacuum arc. In many previous visualization experiments on vacuum arcs, particularly when a bright arc core appeared at high currents, the light emissions saturated the camera system. This obscured both the details of the arc and the transition point between arc modes.Furthermore, the use of film cameras in many experiments made it difficult to numerically analyze the images, and often resulted in subjective definitions of the various arc modes. Experiments using a digital imaging system where the light intensity was limited to the dynamic range of the camera provided significant information on the behavior of vacuum arcs on Cu-Cr contacts in an axial magnetic field (AMF). This work focused on qualitatively analyzing the light emissions from the bright arc core that appeared at high currents, both parallel to the contacts and along the contact gap. The use of arc light intensity allowed for a more concrete identification of the transition point between arc modes.

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MHD model of plasma column of high current vacuum arc

Shmelev

Proceedings ISDEIV. 19th International Symposium on Discharges and Electrical Insulation in Vacuum (Cat. No.00CH37041)

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Cathode processes in free burning and stabilized by axial magnetic field vacuum arcs

Cited by 3 publications

References 12 publications

Current density on the cathode of high current vacuum arc stabilized by axial magnetic field

Current density on the cathode of high current vacuum arc stabilized by axial magnetic field

Visual measurements of plasma arc modes in a high-current vacuum arc with an axial magnetic field [electrical contacts]

MHD model of plasma column of high current vacuum arc

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