Czechoslovak Journal of Physics

, Volume 56, Supplement 2, pp B145–B150

Direct measurements of the plasma potential by katsumata-type probes

  • R. Schrittwieser
  • C. Ionitá
  • J. Adámek
  • J. Stöckel
  • J. Brotánková
  • E. Martines
  • G. Popa
  • C. Costin
  • L. van de Peppel
  • G. van Oost
Article

DOI: 10.1007/s10582-006-0190-7

Cite this article as:
Schrittwieser, R., Ionitá, C., Adámek, J. et al. Czech J Phys (2006) 56(Suppl 2): B145. doi:10.1007/s10582-006-0190-7

Abstract

By taking advantage of the inherent difference between the gyro-radii of ions and electrons in a magnetised plasma, we developed a method to measure the plasma potential directly. The principle is based on the concept of the Katsumata probe. The probe collector is hidden inside a tube which screens an adjustable fraction of the electron flux whereas it lets pass most of the ions. In this paper an arrangement of three Katsumata-type probes with different diameters is used in the edge plasma region of the CASTOR tokamak to investigate the influence of the dimension of the probe. The results show almost no influence of the probe diameter on the values of the plasma potential.

Key words

toroidal plasma system tokamak probe diagnostics plasma potential 

Copyright information

© Institute of Physics, Academy of Sciences of Czech Republic 2006

Authors and Affiliations

  • R. Schrittwieser
    • 1
  • C. Ionitá
    • 1
  • J. Adámek
    • 2
  • J. Stöckel
    • 2
  • J. Brotánková
    • 2
  • E. Martines
    • 3
  • G. Popa
    • 4
  • C. Costin
    • 4
  • L. van de Peppel
    • 5
  • G. van Oost
    • 6
  1. 1.Association EURATOM-ÖAW, Institute for Ion Physics and Applied PhysicsLeopold-Franzens University of InnsbruckAustria
  2. 2.Institute of Plasma PhysicsAssociation EURATOM/IPP.CRPragueCzech Republic
  3. 3.Consorzio RFX, Associazione EURATOM-ENEA sulla FusionePadovaItaly
  4. 4.Association EURATOM-MEdC, Faculty of PhysicsAl. I. Cuza UniversityIasiRomania
  5. 5.Hogeschool RotterdamRotterdamNetherlands
  6. 6.Department of Applied PhysicsGhent UniversityBelgium

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