Improved resolution for a multi-fringe phase detection circuit of a far infrared laser interferometer on LHD

被引：10

作者：

Ito, Y ^{[1
]}

Haba, K ^{[1
]}

Tokuzawa, T ^{[1
]}

Kawahata, K ^{[1
]}

机构：

[1] Natl Inst Fus Sci, Gifu 5095292, Japan

来源：

FUSION ENGINEERING AND DESIGN | 2001年 / 56-57卷

关键词：

large helical device (LHD); far infrared; phase detection; laser interferometer;

D O I：

10.1016/S0920-3796(01)00436-7

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

A multi-fringe phase detection circuit for a far infrared (FIR) laser interferometer of a fusion plasma experiment has been designed. The specification of this circuit is a follows, when the intermediate beat signal is I MHz, the phase detection range is 31 fringes with a phase resolution of 1/80 fringe, and the response speed is 10 mus. Because all phase comparison parts of this circuit are constructed of TTL ICs, the manufacture of this circuit is easy. It has been used to measure the electron density profile in the Large Helical Device (LHD). (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：965 / 968

页数：4