| Autor: |
Kaur, M., Diallo, A., LeBlanc, B., Segado-Fernandez, J., Viezzer, E., Huxford, R. B., Mancini, A., Cruz-Zabala, D. J., Podesta, M., Berkery, J. W., Garcia-Muñoz, M. |
| Předmět: |
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| Zdroj: |
Review of Scientific Instruments; Sep2024, Vol. 95 Issue 9, p1-6, 6p |
| Abstrakt: |
We describe the design of a Thomson scattering (TS) diagnostic to be used on the SMall Aspect Ratio Tokamak (SMART). SMART is a spherical tokamak being commissioned in Spain that aims to explore positive triangularity and negative triangularity plasma scenarios at a low aspect ratio. The SMART TS diagnostic is designed to operate at high spatial resolution, 6 mm scattering length in the low-field side and 9 mm in the high-field side regions, and a wide dynamic range, electron temperature from 1 eV to 1 keV and density from 5 × 1 0 18 m − 3 to 1 × 1 0 20 m − 3 , to resolve large gradients formed at the plasma edge and in the scrape-off layer (SOL) under different triangularities and low aspect ratios. A 2 J @ 1064 nm laser will be used that is capable of operating in the burst mode at 1, 2, and 4 kHz to investigate fast phenomena and at 30 Hz to study 1 s (or more) long discharges. The scattered light will be collected over an angular range of 60 ° – 120 ° from 28 spatial points in the midplane covering the entire plasma width and the outer midplane SOL. Each scattering signal will be spectrally resolved on five wavelength channels of a polychromator to obtain the electron temperature measurement. We will also present a method to monitor in situ laser alignment in the core during calibrations and plasma operations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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