UC Davis PDG:2-D ECE Images from TEXT-U


Shown above are the first 2-D images of plasma electron temperatures measured at 313.5 ms (left) and 346.9 ms (right) of shot 227440 on TEXT-U, obtained by sweeping the LO frequency of the ECE imaging system. It is seen that the central region of the electron temperature profiles is hot and flat during MHD activity. For coordinates and values of temperatures, please see the corresponding 2-D profiles. For further technical details, and ECE Imaging measurements and results from TEXT-U, please examine the following links:

*2-D temperature profiles
*Temperature profile evolution during sawteeth activity
*Temperature profile evolution during tearing mode activity
*Cross-correlation measurements of electron temperature fluctuations
*Temperature snakes observed during high power ECRH

The unique features of the ECE Imaging diagnostics derive from the use of wideband, low cost monolithic and hybrid Schottky diode mixer arrays. Follow the links below to learn more about both the technology and the techniques employed in ECE Imaging. 

*Imaging array design and fabrication
*Correlation Measurements

UC Davis has fabricated and installed multichannel ECE Imaging systems on other fusion plasma tokamaks across the world. Follow the links below for a description of the systems involved, and to sample data collected with these systems. 

*ECE Imaging on the RTP tokamak in the U.S.A.
*ECE Imaging on the TEXTOR tokamak in Germany

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