CO2-LASER INTERFEROMETER FOR ELECTRON-DENSITY MEASUREMENT IN JT-60U TOKAMAK

被引：20

作者：

KAWANO, Y

NAGASHIMA, A

ISHIDA, S

FUKUDA, T

MATOBA, T

机构：

[1] Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, Naka-gun, Ibaraki-ken, Naka-machi

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1992年 / 63卷 / 10期

关键词：

D O I：

10.1063/1.1143515

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A tangential chord CO2 laser interferometer for electron density measurement in the JT-60U tokamak is described. To compensate for a phase shift due to mirror vibrations, an IR-HeNe laser interferometer is introduced. Probe beams of the CO2 and the IR-HeNe lasers travel in a similar form for a distance of 100 m by utilizing relay optics. The effective phase resolution of the system is estimated to be 1/68 fringe, which corresponds to a line integrated density of 3.1 X 10(18) M-2. An ultra-accurate phase comparator which has a 1/10(4) fringe resolution is proposed to improve the capability of present and future interferometers.

引用

页码：4971 / 4973

页数：3

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