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Profile Reconstruction Methods for Pulse Reflectometry
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We present an analysis of the time delay methods of plasma profile reconstruction applied to ultra-short pulse (USP) reflectometry. As the instantaneous frequencies become poorly localized in the time domain, even the advanced time-frequency analysis fails to produce reliable values of the time delay for corresponding modes. Based on the results of analytical modeling of USP propagation in plasma the signal record analysis method of profile reconstruction is proposed. The method has an advantage of relying on a row signal record rather than on the delay time of each frequency mode, which makes it more robust and reliable for the problem of density profile measurements using USP reflectometry.
Title: Profile Reconstruction Methods for Pulse Reflectometry
Description:
We present an analysis of the time delay methods of plasma profile reconstruction applied to ultra-short pulse (USP) reflectometry.
As the instantaneous frequencies become poorly localized in the time domain, even the advanced time-frequency analysis fails to produce reliable values of the time delay for corresponding modes.
Based on the results of analytical modeling of USP propagation in plasma the signal record analysis method of profile reconstruction is proposed.
The method has an advantage of relying on a row signal record rather than on the delay time of each frequency mode, which makes it more robust and reliable for the problem of density profile measurements using USP reflectometry.
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