Speaker
Description
In SST-1 Tokamak, two ECRH systems are used 42GHz-500kW and 82.6GHz-200k to carry out varying experiments related plasma breakdown and heating at fundamental and second harmonic. The SST-1 tokamak is operated at 1.5T magnetic field and 42GHz ECRH system has been extensively for plasma start-up and heating. The 82.6GHz ECRH could not be used thoroughly due limitation in power as 200kW power is not enough for breakdown in SST-1 at second harmonic. The original 82.6GHz-200kW ECRH system is being upgraded in terms of ECRH power to carry out experiment at higher ECRH power.
The 82.6GHz-200kW Gyrotron has been upgraded to 400kW power. The Gyrotron has been tested successfully at factory and delivers 400kW power at 48kV beam voltage and draw around 20A beam current, the efficiency of Gyrotron is around 42%. The Gyrotron will be commissioned at IPR on dummy load. The total ECRH power 0.9MW (0.5MW at 42GHz and 0.4MW at 82.6GHz) will facilitate to carry out EC heating experiments simultaneously at fundamental and second harmonic. The paper will present the recent test results of 82.6GHz-400kW Gyrotron and discuss the experimental plan with upgraded ECRH system.
References
[1] D. Bora, et al., Journal of Physics Conference Series 25:96-102 (2005)
