Study of discharge quenching in the T-10 tokamak by injecting high-Z impurity pellets |
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Authors: | V. M. Timokhin V. Yu. Sergeev B. V. Kuteev |
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Affiliation: | (1) St. Petersburg State Technical University, Politekhnicheskaya ul. 29, St. Petersburg, 195251, Russia |
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Abstract: | The problem of the fast quenching of a discharge in tokamaks by injecting high-Z impurity pellets is considered. Results are presented from experiments in the T-10 tokamak, in which a substantial decrease (up to 70%) in the thermal plasma energy was observed. A one-dimensional transport code is developed to describe tokamak-discharge quenching. The code is used to simulate the experiments on quenching the T-10 discharge. It is shown that the injection of a high-Z pellet into the T-10 plasma changes the transport coefficients as compared to their steady-state values derived from the energy balance or scalings. |
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