An overview of the JET edge LIDAR system optics near the Tokamak.
Detector response time as measured by the manufacturer and by the LIDAR team.
EQE of the different detectors used on the JET edge LIDAR system; MA-2, GaAs and GaAsP. Note that the ruby laser wavelength is 694 nm.
Detector responses to a dc light source, showing the comparison between the old and new detectors and the very fast switch-on .
The edge LIDAR spectrometer spectral functions.
Raw data traces of the enhanced JET edge LIDAR system, showing the four detectors. The sudden increase in signal to the right of the trace is caused by the laser beam hitting the JET machine wall, this saturates the detectors. A small difference in timing is visible, this is caused by a difference in total distance to each detector, this is calibrated for.
Data from the upgraded edge LIDAR system, showing the data along the laser line of sight.
Showing the edge LIDAR data mapped on to the machine midplane and compared to other diagnostics.
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