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2012/2013 Golem , Prague

2012/2013 Golem , Prague. GOMTRAIC. Electrostatic Probe. Supervisor: Jana Brotankova. 1 . The probe. 2 . Radial Profile. A. Floating Potential. Not consistent. 2 . Radial Profile. A. Floating Potential. 2 . Radial Profile. A. Floating Potential. 2 . Radial Profile.

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2012/2013 Golem , Prague

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  1. 2012/2013 Golem, Prague GOMTRAIC ElectrostaticProbe Supervisor: JanaBrotankova

  2. 1. Theprobe

  3. 2. Radial Profile A. FloatingPotential Notconsistent

  4. 2. Radial Profile A. FloatingPotential

  5. 2. Radial Profile A. FloatingPotential

  6. 2. Radial Profile A. FloatingPotential t t+5ms

  7. 2. Radial Profile A. FloatingPotential – Electrical Field Notconsistent

  8. 2. Radial Profile A. FloatingPotential – PoloidalVelocity Notconsistent

  9. 2. Radial Profile A. FloatingPotential – PoloidalVelocity t+5ms t

  10. 2. Radial Profile B. IonSaturationCurrent Probe disturbing the plasma

  11. 2. Radial Profile B. IonSaturationCurrent t t+5ms

  12. 3. ProbeOrientation A. IonSaturationCurrent Mess 1st day 2nd day

  13. 3. ProbeOrientation A. IonSaturationCurrent 2nd day t+2ms t

  14. 3. ProbeOrientation A. IonSaturationCurrent Poloidal cross-sectional view Top view LFS

  15. 2. ProbeOrientation B. Floatingpotential Opposite behaviour of LFS and HFS 1st day Consistent with expectation 2nd day

  16. 3. Conclusions • Radial profiles of Ufl and Isat were measured: • For deeper positions the plasma is disturbed by the probe • Safe depth of the probe was estimated • Radial electrical field and poloidal velocity were determined • Polar dependence of radial profiles of Ufl and Isat were measured: • Four angles of Langmuir probe were measured • For some regimes, results are consistent with expectations • We found very inconsistent regime => we need to be careful about LFS and HFS • Gomtraic doesn’t end up today

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