Devices for measuring density and displacement of the plasma column using a microwave phasometer for automatic control of gas puffing and positioning of the plasma column in the Tuman-3 tokamak
Results are presented from experiments on building up the plasma density in Tuman-3 using automatic control of gas puffing. A microwave phasometer was used to monitor the density, with a device for defining an evaluating function which is independent of the displacement of the plasma column. Data on the evolution of the density profile are used to determine the conditions under which this sensor operates effectively. Results are also presented on a device for detecting the displacement of the column using the microwave phasometer with an evaluating function which is independent of the density. Results are presented from the experimental comparison of the efficacy of microwave and electromagnetic sensors for the displacement. It is shown that the optimum choice is automatic control of gas puffing with subsequent use first of electromagnetic and then of microwave sensors. This arrangement is more sensitive to slow shifts of the plasma column in the quasistationary stage of the discharge than automatic control using electromagnetic sensors. 4 refs., 4 figs.
- OSTI ID:
- 416260
- Journal Information:
- Soviet Journal of Plasma Physics, Vol. 18, Issue 2; Other Information: PBD: Feb 1992; TN: Translated from Fiz. Plazmy; 18: No. 2, 158-161(Feb 1992)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Evolution of the plasma density in the Tuman-3 tokamak
Heavy ion beam probe development for the plasma potential measurement on the TUMAN-3M tokamak