Improving measurement accuracy by optimum data acquisition for Nd:YAG Thomson scattering system

Area of Science:

• Plasma physics
• High-speed electronics
• Data acquisition systems

Background:

• Nd:YAG Thomson scattering is a crucial diagnostic for plasma measurements.
• Existing systems face challenges with signal-to-noise ratio and data handling.
• Direct digitization of scattered light signals offers potential improvements.

Purpose of the Study:

• To develop a high-speed Analog-to-Digital Converter (ADC) for Nd:YAG Thomson scattering.
• To improve the signal-to-noise ratio (SNR) of Thomson scattering measurements.
• To reduce data storage requirements for plasma discharge analysis.

Main Methods:

• Development of a novel high-speed Nd:YAG Thomson scattering ADC (HYADC).
• Implementation of a ring buffer memory and stop trigger system for data storage reduction.
• Utilizing SiTCP for efficient data transfer.
• Designing for easy multi-channel expansion and compact integration with polychromators.

Main Results:

• The HYADC directly converts scattered light signals into digital data.
• Expected improvement in the signal-to-noise ratio of Nd:YAG Thomson scattering measurements.
• Drastic reduction in data storage requirements for full plasma discharge.
• SiTCP facilitates efficient data transfer.
• The system is designed for easy scalability and integration.

Conclusions:

• The developed HYADC offers a significant advancement in Thomson scattering diagnostics.
• It promises enhanced measurement accuracy and reduced data management overhead.
• The compact and expandable design facilitates its implementation in various plasma research settings.