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Novel internal measurements of ion cyclotron frequency range fast-ion driven modes
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Crocker, N. A., Tang, S. X., Thome, K. E., Lestz, J. B., Belova, E. V., Zalzali, A., Dendy, R. O., Peebles, W. A., Barada, K. K., Hong, R., Rhodes, T. L., Wang, G., Zeng, L., Carter, T. A., DeGrandchamp, G. H., Heidbrink, W. W. and Pinsker, R. I. (2022) Novel internal measurements of ion cyclotron frequency range fast-ion driven modes. Nuclear Fusion, 62 (2). 026023. doi:10.1088/1741-4326/ac3d6a ISSN 0029-5515.
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WRAP-Novel-internal-measurements-ion-cyclotron-Zalzali-Dendy-2022.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (3276Kb) | Preview |
Official URL: http://dx.doi.org/10.1088/1741-4326/ac3d6a
Abstract
Novel internal measurements and analysis of ion cyclotron frequency range fast-ion driven modes in DIII-D are presented. Observations, including internal density fluctuation (˜n) measurements obtained via Doppler backscattering, are presented for modes at low harmonics of the ion cyclotron frequency localized in the edge. The measurements indicate that these waves, identified as coherent ion cyclotron emission (ICE), have high wave number, k⊥ρfast1, consistent with the cyclotron harmonic wave branch of the magnetoacoustic cyclotron instability, or electrostatic instability mechanisms. Measurements show extended spatial structure (at least ∼1/6 the minor radius). These edge ICE modes undergo amplitude modulation correlated with edge localized modes (ELM) that is qualitatively consistent with expectations for ELM-induced fast-ion transport.
| Item Type: | Journal Article | ||||||||||||||||||||||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Ion cyclotron resonance spectrometry, Backscattering, Solar energetic particles | ||||||||||||||||||||||||
| Journal or Publication Title: | Nuclear Fusion | ||||||||||||||||||||||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||||||||||||||||||||||
| ISSN: | 0029-5515 | ||||||||||||||||||||||||
| Official Date: | 5 January 2022 | ||||||||||||||||||||||||
| Dates: |
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| Volume: | 62 | ||||||||||||||||||||||||
| Number: | 2 | ||||||||||||||||||||||||
| Number of Pages: | 8 | ||||||||||||||||||||||||
| Article Number: | 026023 | ||||||||||||||||||||||||
| DOI: | 10.1088/1741-4326/ac3d6a | ||||||||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||
| Date of first compliant deposit: | 3 March 2022 | ||||||||||||||||||||||||
| Date of first compliant Open Access: | 9 March 2022 | ||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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