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Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography

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Synchronized operation by field programmable gate array based signal controller for the Thomson scattering diagnostic

W R Lee¹, H S Kim, M K Park

¹National Fusion Research Institute, Gwahangno 113, Daejeon 305-333, South Korea.

The Review of Scientific Instruments

|October 2, 2012

Summary

The Thomson scattering diagnostic system on KSTAR now provides electron temperature and density data. A field-programmable gate array (FPGA) controller enables precise timing and data acquisition for fusion research.

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Area of Science:

Plasma Physics
Fusion Energy Research
Diagnostic Systems

Background:

The Korea Superconducting Tokamak Advanced Research (KSTAR) facility requires advanced diagnostics for plasma characterization.
Accurate measurement of electron temperature and density is crucial for understanding and controlling fusion plasmas.

Purpose of the Study:

To report the successful installation and initial operation of a Thomson scattering diagnostic system at KSTAR.
To demonstrate the capability of a novel field-programmable gate array (FPGA) based control system for plasma diagnostics.

Main Methods:

Installation of a Thomson scattering diagnostic system.
Development and implementation of an FPGA-based signal control board for triggering, detection, and timing.
Integration of the diagnostic system with the KSTAR facility using Ethernet communication and standard middleware.

Main Results:

The Thomson scattering diagnostic system successfully acquired electron temperature and electron density data starting from the 2011 KSTAR campaign.
The FPGA controller effectively managed laser triggering, signal detection, and asynchronous time measurements.
The system demonstrated reliable operation over two experimental campaigns, with adaptable logic designs.

Conclusions:

The implemented Thomson scattering diagnostic system is a valuable addition to KSTAR, providing essential plasma data.
The FPGA-based control system offers a flexible and robust solution for advanced fusion diagnostics.
This advancement supports ongoing efforts in fusion energy research at KSTAR.