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Measurement of poloidal flows on the Castor tokamak

  • Tokamaks and Other Magnetic Confinement Devices
  • Published:
Czechoslovak Journal of Physics Aims and scope

Abstract

Poloidal flows are measured using a rotating Mach probe located in the edge plasma of the Castor tokamak (R=0.4 m,a=85 mm,B T =1 T,I p ≌kA,\(\bar n \simeq 1 \cdot 10^{19} m^{ - 3} \). The probe consists oftwo parallel planar Langmuir probes operating in the ion saturation current mode. One revolution of the probe is typically 3–6 ms.

A 1D fluid model has been developed to interpret the probe data. In particular, the ratio of the upstream and downstream signals is calculated for all the inclination angles. This theoretical ratio is compared with the experimental one and a remarkably good agreement is found if the parallel and perpendicular Mach numbers are properly chosen. Measurements carried out in polarized discharges show a substantial increase of the poloidal as well as toroidal flows in the proximity of the separatrix.

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Authors and Affiliations

  1. Institute of High Temperatures, High Energy Density Research Centre, Izhorskay 13/19, 127412, Moscow, Russia

    K. Dyabilin

  2. Institute of Plasma Physics, Association EURATOM/IPP.CR, Academy of Sciences of the Czech Republic, Za Slovankou 3, P.O. Box 17, CZ-182 21, Praha 8, Czech Republic

    M. Hron, J. Stőckel & F. Žáĉek

Authors
  1. K. Dyabilin
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  2. M. Hron
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  3. J. Stőckel
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  4. F. Žáĉek
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Dyabilin, K., Hron, M., Stőckel, J. et al. Measurement of poloidal flows on the Castor tokamak. Czech. J. Phys. 50 (Suppl 3), 57–60 (2000). https://doi.org/10.1007/BF03165856

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  • DOI: https://doi.org/10.1007/BF03165856

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