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Collective Thomson scattering measurements with high frequency resolution at TEXTOR
M Stejner1, S K Nielsen, S B Korsholm
1Association EURATOM-Risø DTU, DK-4000 Roskilde, Denmark. mspe@risoe.dtu.dk
The Review of Scientific Instruments
|November 2, 2010
Summary
A new receiver system for collective Thomson scattering (CTS) diagnostics at TEXTOR offers improved megahertz frequency resolution. This advancement enhances diagnostic capabilities and enables new measurements, showing results consistent with theory.
Area of Science:
- Plasma Physics
- Fusion Energy Research
- Diagnostic Techniques
Background:
- Collective Thomson scattering (CTS) is a key diagnostic for plasma properties.
- Existing CTS systems have limitations in frequency resolution.
- TEXTOR is a tokamak facility used for fusion energy research.
Purpose of the Study:
- To develop and present a new receiver system for CTS diagnostics with enhanced frequency resolution.
- To expand the diagnostic capabilities of CTS measurements.
- To enable the detection of ion Bernstein wave signatures in CTS spectra.
Main Methods:
- Development of a novel receiver system for CTS.
- Implementation of high-frequency resolution capabilities (megahertz range or better).
- Validation of the new system using theoretical predictions and simultaneous measurements from a standard receiver.
Main Results:
- The new CTS receiver system achieves megahertz or better frequency resolution.
- The improved resolution expands the diagnostic range and utility of CTS.
- Initial results are consistent with theoretical models and existing measurement systems.
Conclusions:
- The developed CTS receiver system represents a significant improvement in diagnostic technology.
- Enhanced frequency resolution is crucial for advanced plasma measurements, including ion Bernstein waves.
- The new system is validated and ready for further scientific investigation at TEXTOR.
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