Loading...
Please wait, while we are loading the content...
Similar Documents
Ion cyclotron emission in NBI-heated plasmas in the TUMAN-3M tokamak
| Content Provider | Scilit |
|---|---|
| Author | Askinazi, Leonid G. Belokurov, Alexander Gin, Dmitri B. Kornev, Vladimir A. Lebedev, Sergei V. Shevelev, Alexeander E. Tukachinsky, A. S. Zhubr, N. A. |
| Copyright Year | 2018 |
| Description | Journal: Nuclear Fusion Ion cyclotron emission (ICE) observation in neutral beam injected (NBI)-heated plasma in the TUMAN-3M tokamak is reported. Experiments were performed in deuterium or hydrogen target plasmas, with neutral heating beam consisting of 60% deuterium and 40% hydrogen atoms accelerated up to 16 keV. High frequency internal magnetic probes were used as a diagnostic tool for ICE detection. In deuterium plasmas, emission with ~ 13MHz frequency was observed, with 1 – 2 ms delay after NBI pulse front; this frequency corresponds approximately to fundamental ion cyclotron (IC) resonance for hydrogen near the magnetic axis. In hydrogen plasmas, ICE with frequency ~7MHz was observed. In the both cases, observed frequency scales as IC resonance of minority ions. In deuterium plasmas, the hydrogen minority ICE spectral line was found to consist of several narrow (width ~ 50 kHz) spectral components, typically three or more, with different spacing (of the order of 50 – 200 kHz), and temporal dynamics in synchronicity with saw-tooth oscillations. Majority fast ion ICE was also observed in several hydrogen and deuterium discharges. Theoretical models developed for explanation of NBI ICE on other tokamaks are not easily applicable for the phenomena observed on the TUMAN-3M. In pure ohmically heated deuterium and hydrogen plasmas, i.e. in the absence of fast ions, a weak ICE was observed as well, with frequency scaling as IC resonance condition in the close proximity to the probes' location. |
| Related Links | http://iopscience.iop.org/article/10.1088/1741-4326/aac10e/pdf |
| ISSN | 00295515 |
| e-ISSN | 17414326 |
| DOI | 10.1088/1741-4326/aac10e |
| Journal | Nuclear Fusion |
| Issue Number | 8 |
| Volume Number | 58 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2018-04-30 |
| Access Restriction | Open |
| Subject Keyword | Journal: Nuclear Fusion Nuclear Energy and Engineering Hydrogen and Deuterium |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nuclear and High Energy Physics Condensed Matter Physics |
