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Study of a Miter Bend Polarizer for Central ECRH on GAMMA-10

Manabu Harigae et al.

Fusion Science and Technology

Volume 55 / Number 2T / February 2009 / Pages 136-139


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The new polarizers with grooved mirrors were installed in ECRH system on the GAMMA 10 to get the optimal polarized wave. Numeric calculation and low power performance test of this pair of polarizers was agreed well. And it is found that the setting error of polarizer angle within ±5° gives negligible reduction of the X-mode ratio less than 1%. On the experiment in the GAMMA 10, it is shown that the fraction of X-mode has key role to heat plasma efficiently.

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