Author/Authors :
Wang، نويسنده , , Y.M. and Gao، نويسنده , , X. and Ling، نويسنده , , B.L. and Zhang، نويسنده , , S.B. and Zhang، نويسنده , , T. and Han، نويسنده , , X. and Liu، نويسنده , , S.C. and Liu، نويسنده , , Z.X. and Liu، نويسنده , , Y. and Ti، نويسنده , , A.، نويسنده ,
Abstract :
A X-mode polarized W-band reflectometer for plasma density profile and fluctuation measurement is designed and installed on EAST. In measuring the density profile, a voltage controlled oscillator (VCO) is used as the source, allowing a high temporal resolution measurement. The density profile in a plasma with high magnetic field (3.0 T) has been measured by combination of V- and W-band reflectometers. For fluctuation measurements, a frequency synthesizer is used instead of the VCO as a microwave source. The core density fluctuations during sawtooth activity are measured and analyzed.
Keywords :
tokamak , Microwave reflectometer , Density profile , Density fluctuation , Heterodyne detection , Sawtooth
