| Autor: |
D. R. Smith, G. McKee, D. Den Hartog, B. Geiger, O. Grulke, X. Han, K. Jaehnig, C. Seyfert, T. Windisch |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Review of Scientific Instruments |
| ISSN: |
1089-7623 |
| Popis: |
A conceptual design for a 2D beam emission spectroscopy diagnostic system to measure ion gyro-scale plasma turbulence at Wendeslstein 7-X is described. The conceptual design identifies field-aligned viewing geometries and ports for cross-field turbulence measurements in the neutral beam volume. A 2D sightline grid covers the outer plasma region, and the grid configuration provides sufficient k-space coverage in radial and poloidal directions for ion temperature gradient and trapped-electron mode turbulence measurements. Emission intensity estimates, optical transmission losses, and detector noise levels indicate that the measurements will be sensitive to plasma density fluctuations as small as δn/ n ≈ 0.5% with a bandwidth of 1 MHz. Implementation challenges include a small beam emission Doppler shift due to nearly radial heating beams and reduced optical throughput due to collection aperture limitations. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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