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Published on: February 4, 2017
Upgraded multipulse laser and multipoint Thomson scattering diagnostics on EAST.
Qing Zang1, Junyu Zhao, Li Yang
1Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui, 230031, People's Republic of China. zangq@ipp.ac.cn
The Review of Scientific Instruments
|July 5, 2011
Summary
The upgraded Thomson scattering diagnostic system in the EAST tokamak experiment now provides faster and more accurate plasma measurements. This advancement utilizes a multipulse neodymium-yttrium aluminum garnet laser and improved data processing for enhanced fusion research.
Area of Science:
- Plasma Physics
- Fusion Energy Research
- Optical Diagnostics
Background:
- Tokamak fusion devices require precise plasma characterization.
- Existing Thomson scattering systems face limitations in speed and accuracy.
- The Experimental Advanced Superconducting Tokamak (EAST) aims to advance fusion energy.
Purpose of the Study:
- To enhance the Thomson scattering diagnostic system in the EAST tokamak.
- To improve the accuracy and speed of plasma measurements.
- To enable the study of wider plasma objects.
Main Methods:
- Upgraded the diagnostic with a multipulse neodymium-yttrium aluminum garnet (Nd:YAG) laser.
- Implemented a multipoint observation volume.
- Introduced a novel optical laser alignment technique for precise positioning.
- Developed a new lens collection system for broader plasma object measurement.
- Utilized a composite control system for rapid data acquisition.
- Adopted an advanced data processing method for enhanced accuracy.
Main Results:
- Achieved faster data acquisition, with results available in seconds.
- Enabled accurate determination of laser position.
- Expanded the measurable plasma object range.
- Obtained more precise measurement results.
Conclusions:
- The upgraded Thomson scattering diagnostic system significantly enhances EAST tokamak's plasma measurement capabilities.
- The system offers improved speed, accuracy, and measurement range, crucial for fusion energy development.
- This advancement contributes to more effective plasma control and understanding in fusion research.
