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Radial density profile measurement by using the multichannel microwave interferometer in GAMMA 10
M Yoshikawa1, T Matsumoto, Y Shima
1Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan. yosikawa@prc.tsukuba.ac.jp
The Review of Scientific Instruments
|December 3, 2008
Summary
This study presents a multichannel microwave interferometer for measuring plasma electron density and fluctuations. The system successfully captures radial density profiles in a single plasma shot.
Area of Science:
- Plasma Physics
- Fusion Energy Research
Background:
- Accurate measurement of plasma density is crucial for understanding fusion plasmas.
- Existing methods may require multiple shots or complex setups.
Purpose of the Study:
- To develop and demonstrate a novel multichannel microwave interferometer.
- To enable single-shot radial plasma electron density and fluctuation measurements.
Main Methods:
- Reconstruction of a multichannel microwave interferometer.
- Utilized transmission horn repositioning and a Teflon lens.
- Achieved radial profile measurements within a single plasma discharge.
Main Results:
- Successfully measured the radial plasma electron density profile.
- Successfully measured plasma density fluctuation spectra.
- Demonstrated capability for single-shot measurements.
Conclusions:
- The reconstructed interferometer system is effective for comprehensive plasma density diagnostics.
- This advancement facilitates efficient data acquisition in fusion research.
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