Fast video registration of transition processes from diffuse mode to anode spot mode in high-current arc with copper-chromium electrodes

S. Popov, A. Schneider, V. Lavrinovich, A. Batrakov, S. Gortschakow, A. Khakpour

    Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

    4 Цитирования (Scopus)

    Аннотация

    Transition process from a diffuse to anode spot mode in high-current vacuum arc discharge with Cu-Cr electrodes has been studied experimentally. Images of the arc were recorded with a frequency of about 25000 frames per second synchronously with the acquisition of current and voltage waveforms. Experiments clarify that after the current reaches a certain threshold value (4 to 5 kA for bulk-type, 2-cm electrodes), the arc discharge passes from diffuse mode to the mode with anode spot and voltage increased by ∼20 V. In this mode, bright anode jet appears; cathode micro spots are reduced in number and grouped in front of the anode jet with the formation the cathode macro spot. In such a threshold regime, the discharge can change to the anode-spot mode and back to diffuse mode many times, with transition time in the microsecond range. With increasing current amplitude, anode spot mode becomes more stable, cathode and anode macro-jets are coming closer together forming a quasi-continuous radially-constricted discharge channel. The constriction of discharge is accompanied by increasing power density on both electrodes. In the case of TMF type electrodes, the constricted plasma channel moves azimuthally along the electrode lobe.

    Язык оригиналаАнглийский
    Название основной публикацииISDEIV 2016 - Proceedings of the 27th International Symposium on Discharges and Electrical Insulation in Vacuum
    ИздательInstitute of Electrical and Electronics Engineers Inc.
    Том2016-November
    ISBN (электронное издание)9781467397803
    DOI
    СостояниеОпубликовано - 18 ноя 2016
    Событие27th International Symposium on Discharges and Electrical Insulation in Vacuum, ISDEIV 2016 - Suzhou, Китай
    Продолжительность: 18 сен 201623 сен 2016

    Конференция

    Конференция27th International Symposium on Discharges and Electrical Insulation in Vacuum, ISDEIV 2016
    СтранаКитай
    ГородSuzhou
    Период18.9.1623.9.16

    ASJC Scopus subject areas

    • Software
    • Computer Networks and Communications

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  • Цитировать

    Popov, S., Schneider, A., Lavrinovich, V., Batrakov, A., Gortschakow, S., & Khakpour, A. (2016). Fast video registration of transition processes from diffuse mode to anode spot mode in high-current arc with copper-chromium electrodes. В ISDEIV 2016 - Proceedings of the 27th International Symposium on Discharges and Electrical Insulation in Vacuum (Том 2016-November). [7748756] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/DEIV.2016.7748756