Investigations of the start up phase in the TM-1-MH tokamak

Prinzler, H.; Heymann, P.; Ştöckel, J.; Badalec, J.; Žáček, F.; Jakubka, K.; Kopecký, Vít

doi:10.1007/bf01589863

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…When the vertical and horizontal orientations of the magnetic field from Fig. 3 are summed up, the perpendicular electrostatic field of the plasma is -5 X 10 6 (1)…”

Section: Discussionmentioning

confidence: 99%

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Convective losses during current initiation in tokamaks

Valovič

1987

Nucl. Fusion

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The mechanism of convective losses in the phase preceding the formation of rotational transform is studied on the CASTOR tokamak. It is shown that convection is caused by E X B drift associated with a strong perpendicular electrostatic field. This field is generated by charge separation as a result of a directed flow of electrons along non-toroidal magnetic field lines intersecting the wall. Convection exceeds Bohm diffusion by a factor of 700 for a perpendicular magnetic field of 10~3 T.

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“…When the vertical and horizontal orientations of the magnetic field from Fig. 3 are summed up, the perpendicular electrostatic field of the plasma is -5 X 10 6 (1)…”

Section: Discussionmentioning

confidence: 99%

“…The mechanism of this convection is not yet fully understood. Studies of electron drift due to field gradients and centrifugal forces have been reported in Refs [5][6][7][8]. However, these loss models are not consistent with the condition of plasma quasi-neutrality.…”

Section: Introductionmentioning

confidence: 99%

Convective losses during current initiation in tokamaks

Valovič

1987

Nucl. Fusion

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“…The start-up phase of a discharge in a TM-I-MH tokamak was investigated in [1]. The mechanism of particle losses in the phase preceding the formation of a rotational transform was studied in the TM-I-MH tokamak in [2], and the importance of stray magnetic fields was discussed. The breakdown phase directly affected the ultimate properties of the plasma: the production of runaway electrons, impurities, equilibrium, stability, etc.…”

Section: Introductionmentioning

confidence: 99%

Breakdown Phase in the GOLEM Tokamak and Its Impact on Plasma Performance

et al. 2021

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The effect of the breakdown phase on subsequent plasma parameters in GOLEM tokamak is investigated remotely. The dependence of the breakdown voltage and the breakdown time on the time delay between the switchings-on of a toroidal magnetic field Bt and a toroidal electric field Et for different groups of the pressure magnitudes is built. The performed experiments have shown that, for GOLEM tokamak, the shorter the temporal delay, the better are the mean plasma parameters. In addition, the breakdown phase is discussed in more details. In the discussion, the avalanche phase of the breakdown is analyzed. The dominant mechanism of particle losses during the avalanche phase, future steps, and tasks are discussed and set. The experiments on studying the breakdown phase have been carried out remotely on GOLEM tokamak by undergraduate students of V.N. Karazin Kharkiv National University.

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