A novel approach to direct measurement of the plasma potential

  • J. Adámek
  • J. Stöckel
  • M. Hron
  • J. Ryszawy
  • M. Tichý
  • R. Schrittwieser
  • C. Ionită
  • P. Balan
  • E. Martines
  • G. Van Oost
Tokamaks and Other Magnetic Confinement Devices

DOI: 10.1007/BF03166386

Cite this article as:
Adámek, J., Stöckel, J., Hron, M. et al. Czech. J. Phys. (2004) 54(Suppl 3): C95. doi:10.1007/BF03166386

Abstract

A novel probe and approach to the direct measurements of the plasma potential in a strong magnetic field is suggested. The principle of this method is to reduce the electron saturation current to the same magnitude as that of the ion saturation current. In this case, the floating potential of the probe becomes indentical to the plasma potential. This goal is attained by a shield, which screens off an adjustable part of the electron current from the probe collector due to the much smaller gyro-radius of the electrons. First systematic measurements have been perfomred in the CASTOR tokamak.

PACS

52.70.Ds 

Key words

tokamak edge plasma plasma potential Langmuir probe 

Copyright information

© Springer 2004

Authors and Affiliations

  • J. Adámek
    • 1
  • J. Stöckel
    • 1
  • M. Hron
    • 1
  • J. Ryszawy
    • 1
  • M. Tichý
    • 2
  • R. Schrittwieser
    • 3
  • C. Ionită
    • 3
  • P. Balan
    • 3
  • E. Martines
    • 4
  • G. Van Oost
    • 5
  1. 1.Institute of Plasma PhysicsAssociation EURATOM/IPP.CPPragueCzech Republic
  2. 2.Faculty of Mathematics and PhysicsCharles UniversityPragueCzech Republic
  3. 3.Department of Ion PhysicsUniversity of InnsbruckInnsbruckAustria
  4. 4.Consorzio RFXAssociatzione EURATOM-ENEAPadovaItaly
  5. 5.Department of Applied PhysicsGhent UniversityGentBelgium

Personalised recommendations