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Anomalous plasma phenomena of hollow cathode arc discharge

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Czechoslovak Journal of Physics B Aims and scope

Abstract

Magnetically confined argon plasma produced by hollow cathode arc discharge has been studied in different experimental conditions, with discharge current from 10–50 A, vessel argon pressure between 10−3 and 10−4 torr (1 torr=133·32 Pa) and axial magnetic field up to 0·12 T. The plasma density measured by a cylindrical Langmuir probe is found to be 1019 to 4 × 1019 m−3 and the electron temperatureT e varies between 2·5 and 4·8 eV. When an external axial magnetic field is applied the plasma temperature decreases with the increase in the magnetic field intensity until it reaches a minimum value at 0·075T and then increases with the same rate. This has been interpreted as high frequency waves excitation due to electron beam-plasma interaction, which explains the electron density jumps with the magnetic field intensity. Enhanced plasma transport across the magnetic field is studied and classified as anomalous diffusion.

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Authors and Affiliations

  1. Physics Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt

    W. Sharkawy & M. M. Masoud

  2. Atomic Energy Authority-Plasma Physics and Accelerators Department, P.O. Box 13759, Cairo

    M. M. Masoud

Authors
  1. W. Sharkawy
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  2. M. M. Masoud
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Sharkawy, W., Masoud, M.M. Anomalous plasma phenomena of hollow cathode arc discharge. Czech J Phys 36, 800–805 (1986). https://doi.org/10.1007/BF01598329

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  • DOI: https://doi.org/10.1007/BF01598329

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