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Doppler spectroscopy and D-alpha emission diagnostics for the C-2 FRC plasma
Deepak K Gupta1, E Paganini, A Balvis
1Tri Alpha Energy, Inc., P.O. Box 7010, Rancho Santa Margarita, California 92688, USA. dgupta@trialphaenergy.com
The Review of Scientific Instruments
|November 2, 2010
Summary
New Doppler spectroscopy tools enhance measurements of ion temperature and velocity in field reversed configuration (FRC) plasmas. These advancements aid in understanding and optimizing FRC plasma performance in the C-2 device.
Area of Science:
- Plasma Physics
- Spectroscopy
- Fusion Energy Research
Background:
- Field Reversed Configurations (FRCs) are a promising avenue for fusion energy.
- Accurate measurement of plasma properties like ion temperature and velocity is crucial for FRC optimization.
- Existing diagnostic limitations hinder detailed plasma analysis in devices like C-2.
Purpose of the Study:
- To develop and implement advanced Doppler spectroscopy diagnostics for FRC plasmas.
- To enhance the measurement capabilities for ion temperature, velocity, and neutral deuterium density.
- To contribute to a better understanding and improvement of FRC plasmas in the C-2 device.
Main Methods:
- Development of a multichord ion Doppler diagnostic utilizing an image-intensified camera for 15-chord measurements.
- Implementation of a single-chord, fast-response ion Doppler diagnostic with a 16-channel photomultiplier tube array.
- Creation and calibration of an eight-channel D-alpha diagnostic for absolute radiance measurements of neutral deuterium density.
Main Results:
- Successful deployment of complementary Doppler spectroscopy diagnostics.
- Demonstrated capability for simultaneous, multi-chord ion temperature and velocity measurements.
- Established a sensitive diagnostic for neutral deuterium density under various plasma and wall conditions.
Conclusions:
- The developed spectroscopic diagnostics provide enhanced capabilities for FRC plasma characterization.
- These tools are instrumental in correlating plasma parameters with FRC performance.
- The integrated diagnostic suite supports ongoing efforts to improve FRC stability and confinement in the C-2 device.
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