Electron Density Profile Measurements on LHD

Improved reflectometer electron density profile measurements on DIII-D

Details are presented of recent improvements to hardware and analysis code components of the DIII-D density profile reflectometer system. The improvements to the hardware increased the system signal-to-noise ratio and reduced spurious reflections. An improved automated method is developed to accurately determine the zero density plasma start position. With these improvements the uncertainty in ...

First Density Profile Measurements Using FMCW Reflectometry on JET

Observation of vertical electron density profile in inospheric E-layer during Indian-Ocean earthquake on December 2004 using CHAMP satellite

This paper describes the observation and analysis of vertical electron density before major earthquake above the Sumatra-Malaysia region during Indian Ocean major earthquake in 2004 in Aceh, Sumatra. The electron density profile in E-layer of ionosphere a few days before earthquake and a few hours after earthquake have been observed using the data from the CHAMP satellite. The data obtained fro...

Time Evolution of the Bootstrap Current Profile in LHD Plasmas

The direction of the bootstrap current is inverted in the outward shifted plasmas of the Large Helical Device (LHD). In order to verify the reliability of the theoretical models of the bootstrap current in helical plasmas, the rotational transform profiles are observed by the Motional Stark Effect measurement in the bootstrap current carrying plasmas of the LHD, and they are compared with the n...

Profile Shape Parameterization of Jet Electron Temperature and Density Profiles