A NEW ECE SYSTEM AND ELECTRON TEMPERATURE MEASUREMENTS ON KSTAR TOKAMAK
This work is supported by KSTAR operation project.
The ECE diagnostic system on KSTAR tokamak has been upgraded in order to follow an increase of the operational magnetic field of KSTAR after the 1st plasma. A new 48CHs ECE radiometer with frequency range of 110 GHz to 162 GHz has been installed and the waveguide system was also replaced by corrugated circular over-mode waveguides. But the ECE collecting optics, which consists of two metallic mirrors, was not changed. With this radiometer, some measurements of the electron temperature at the high field side were carried out during the 2nd KSTAR campaign, when the tokamak was operated with 2T of toroidal magnetic field. The electron temperature as well as its radial profile was measured and sawtooth phenomena were also observed.
