| Autor: |
Wang, Mingyuan, Lun, Xiuchun, Bo, Xiaokun, Liu, Bing, Liu, Adi, Shi, Yuejiang |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Plasma Sci. Technol. 25 (2023) 045104 (6pp) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1088/2058-6272/aca373 |
| Popis: |
A high-frequency magnetic probe has been designed and developed on XuanLong-50 (EXL-50) spherical torus to measure high-frequency magnetic field fluctuations caused by energetic ions and electrons in the plasma. The magnetic loop, radio filters, radio-frequency (RF) limiter, and data acquisition system of the probe are described in detail. The results of the preliminary test show that the probe can have a frequency response within the 1- 180 MHz range. The fluctuation data from the EXL-50 plasma were analyzed in the time-frequency domain using fast Fourier transforms. Using this diagnostic system, distinct high-frequency instabilities were detected. In particular, significant frequency chirping was observed, which is consistent with the bump on tail drive instability predicted by the Berk-Breizman model. |
| Databáze: |
arXiv |
| Externí odkaz: |
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