title: A new frequency-multiplied interferometer system in the GAMMA 10 tandem mirror.
abstract: 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.
authors.affiliation: Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki, Japan. kohagura@prc.tsukuba.ac.jp
authors.forename: J
authors.initials: J
authors.lastname: Kohagura
authors.forename: M
authors.initials: M
authors.lastname: Yoshikawa
authors.forename: Y
authors.initials: Y
authors.lastname: Shima
authors.forename: Y
authors.initials: Y
authors.lastname: Morikawa
authors.forename: T
authors.initials: T
authors.lastname: Yamada
authors.forename: D
authors.initials: D
authors.lastname: Akita
authors.forename: K
authors.initials: K
authors.lastname: Tatebe
authors.forename: M
authors.initials: M
authors.lastname: Ichimura
authors.forename: M
authors.initials: M
authors.lastname: Hirata
authors.forename: R
authors.initials: R
authors.lastname: Ikezoe
authors.forename: T
authors.initials: T
authors.lastname: Yokoyama
authors.forename: T
authors.initials: T
authors.lastname: Imai