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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

Publication de 4  numéros par an

ISSN Imprimer: 1093-3611

ISSN En ligne: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

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ANALYSIS OF THE SPONTANEOUS OSCILLATIONS OF THE VOLTAGE OF AN ARC BURNING ON HETEROGENEOUS ELECTRODES BY CURRENT INJECTION

Volume 3, Numéro 2-3, 1999, pp. 157-166
DOI: 10.1615/HighTempMatProc.v3.i2-3.20
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RÉSUMÉ

It has been shown that large amplitude voltage oscillations may be present in free burning arcs in special conditions. These conditions concern the cathode nature, the ambient gas, the gap length, the arc current. To investigate the origin of these oscillations, we inject in an oscillating arc a stepwise current pulse, and record the induced arc voltage variations Depending on the sign of the injected current ΔI vs. arc current I, and on the relative time position of the current injection vs. voltage level, we observe either stable arc behaviour, with a voltage variation proportional to the injected current : ΔU = ui ΔI/I, where ui is the voltage drop in the plasma, or sensitive unstable levels where the voltage exhibits anomalous large amplitude variations. In this latter case, with ΔI > 0, the arc voltage shifts towards the higher level for a short period, then rapidly falls to the lower level. For the stable arc case, we compute the minimum arc voltage and the arc impedance.

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