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Updated: Jun 27, 2026
12:14
The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Development of a multichannel dispersion interferometer at TEXTOR
A Lizunov1, P Bagryansky, A Khilchenko
1Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia.
The Review of Scientific Instruments
|December 3, 2008
Summary
A new 14-channel dispersion interferometer was designed for plasma diagnostics in the TEXTOR tokamak. This modular CO(2) laser system offers full plasma cross-section coverage without needing rigid vibration isolation frames.
Area of Science:
- Plasma physics
- Fusion energy research
- Optical diagnostics
Background:
- Tokamak devices require precise plasma diagnostics for control.
- Existing interferometry methods may have limitations in coverage or complexity.
Purpose of the Study:
- To present the design and characteristics of a novel 14-channel dispersion interferometer.
- To enable comprehensive plasma profile measurement and control in the TEXTOR tokamak.
Main Methods:
- A modular concept utilizing a 10.6 micrometer CO(2) laser source.
- Compact housing for all optical and mechanical elements.
- Internal mirrors and retroreflectors for 12 vertical and 2 diagonal lines of sight within the TEXTOR vacuum vessel.
Main Results:
- The diagnostic achieves full coverage of the tokamak cross-section.
- No rigid frame for vibration isolation is necessary due to the design.
- Successful testing of a single-channel prototype and a pilot module was conducted.
Conclusions:
- The developed 14-channel dispersion interferometer is a viable diagnostic tool for tokamak plasma.
- Its modular design and comprehensive coverage offer advantages for plasma measurement and control.
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