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A new frequency-multiplied interferometer system in the GAMMA 10 tandem mirror

A new frequency-multiplied interferometer system in the GAMMA 10 tandem mirror


J. Kohagura, et al

A new interferometer is installed on the west anchor cell of the GAMMA 10 tandem mirror. In

GAMMA 10, we have used a heterodyne-type interferometer with a 70-GHz IMPATT oscillator and

a 150-MHz oscillator for frequency modulation. The new interferometer consists of a 17.5-GHz phase

locked dielectric resonator oscillator and a 37.5-MHz temperature-compensated crystal oscillator, as

well as frequency multipliers. The main motivation for the new interferometer using frequency multipliers

is to achieve a stable and cost effective interferometer. Direct anchor heating experiments with

new anchor ion cyclotron range of frequency antennas in both the west and the east anchor cells are

carried out. Density increases in both anchor cells are clearly observed using the new interferometer.

REVIEW OF SCIENTIFIC INSTRUMENTS 83, 10E310 (2012),

American Institute of Physics. [http://dx.doi.org/10.1063/1.4731006]

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