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Radial Electron Density Measurement by Using a Multi-Channel Microwave Interferometer in the Tandem Mirror GAMMA 10

Y. Hasegawa et al.

Fusion Science and Technology

Volume 63 / Number 1T / May 2013 / Pages 337-339


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A multi-channel microwave interferometer can measure plasma density radial profiles in a single plasma shot. It has six observing channels for measuring the radial electron line integrated density profile. The multi-channel microwave interferometer has been reconstructed for improving the signal intensity increase. We set a spherical mirror between the probe beam transmission horn and the injection port window of the multi-channel microwave interferometer. The insertion of spherical mirror makes signal intensity in all measuring channels to be improved. Then, we can successfully obtain the radial electron density profile in a single plasma shot.

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