Speakers
Description
Terahertz solid state soures have been successfully applied on an one chord interferometer system on Keda Torus eXperiemnt (KTX), a reversed field pinch machine. For exploring the capacity of microwave source for electro density profile diagnosis of magnetic confinement plasma. The one chord interferometer system has been upgraded to a multi-channel system using the same solid state sources. The optical configuration has been optimized using carefully designed light path and optical elements. The area of the platform holding the whole system including the souces and mixers has been set 3m×3m. The beam width across plasma area has been improved to less than 21mm, and the power has been uniformly distributed at all recievers for seven channels. The system has been installed on KTX machine and the results show that the maximum signal strength can research about 0.6mV and the phase noise of the intermediate frequency is about 0.0674pi, corresponding to about 0.1% of the integral electron density amplitude. The radial profiles of electron density on KTX in different discharge configurations have been reconstructed based on Abel inversion.
