KAWAHATA, Kazuo

Line-integrated electron density at the central chord measured by FIR laser interferometer.

Line-integrated electron density at the central chord measured by FIR laser interferometer.

Line-integrated electron density at the central chord measured by FIR laser interferometer.

Line-integrated electron density at the central chord measured by FIR laser interferometer.

Line-integrated electron density at the central chord measured by FIR laser interferometer.

Two-dimensional phase contrast imaging for local turbulence measurements in large helical device

Two-dimensional phase contrast imaging for local turbulence measurements in large helical device

Two-dimensional phase contrast imaging for local turbulence measurements in large helical device

Microwave reflectometry is a radar technique for density profile and fluctuation measurements by using the cut-off phenomenon in a plasma.

Microwave reflectometry is a radar technique for density profile and fluctuation measurements by using the cut-off phenomenon in a plasma.

Microwave reflectometry is a radar technique for density profile and fluctuation measurements by using the cut-off phenomenon in a plasma.

Microwave reflectometry is a radar technique for density profile and fluctuation measurements by using the cut-off phenomenon in a plasma.

Microwave reflectometry is a radar technique for density profile and fluctuation measurements by using the cut-off phenomenon in a plasma.

Microwave reflectometry is a radar technique for density profile and fluctuation measurements by using the cut-off phenomenon in a plasma.

A Si-FNA (silicon-diode-based fast neutral analyzer) measurements to energy-resolved profile of fast neutrals

FIR laser interferometer measures the line averaged electron density and the electron density profile. Laser source: CH3OH laser (119um, 100mW) Michelson & Heterodyne interferometer (beat freq. 1 MHz). Time resolution: 10us.

FIR laser interferometer measures the line averaged electron density and the electron density profile. Laser source: CH3OH laser (119um, 100mW) Michelson & Heterodyne interferometer (beat freq. 1 MHz). Time resolution: 10us.

FIR laser interferometer measures the line averaged electron density and the electron density profile. Laser source: CH3OH laser (119um, 100mW) Michelson & Heterodyne interferometer (beat freq. 1 MHz). Time resolution: 10us.

FIR laser interferometer measures the line averaged electron density and the electron density profile. Laser source: CH3OH laser (119um, 100mW) Michelson & Heterodyne interferometer (beat freq. 1 MHz). Time resolution: 10us.

Two-color millimeter-wave interferometer at 285 GHz and 140 GHz to measure line-integrated electron density on the horizontal mid-plane

Two-color millimeter-wave interferometer at 285 GHz and 140 GHz to measure line-integrated electron density on the horizontal mid-plane

Two-color millimeter-wave interferometer at 285 GHz and 140 GHz to measure line-integrated electron density on the horizontal mid-plane

Microwave reflectometers measure a density fluctuation, an electron density profile, and a poloidal flow velocity.

Microwave reflectometers measure a density fluctuation, an electron density profile, and a poloidal flow velocity.

Microwave reflectometers measure a density fluctuation, an electron density profile, and a poloidal flow velocity.