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Part 1: Document Description
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Citation |
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Title: |
The Low Frequency Edge Oscillation in Alcator C-Mod and ASDEX Upgrade I-Mode |
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Identification Number: |
doi:10.7910/DVN/UZUY8B |
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Distributor: |
Harvard Dataverse |
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Date of Distribution: |
2025-03-05 |
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1 |
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Bibliographic Citation: |
W. McCarthy, A. E. Hubbard, J. Terry, B. Labombard, A. Kuang, R. Bielajew, I. Hutchinson, J. W. Hughes, D. Silvagni, T. Happel, L. Gil, The Alcator C-Mod Team, The Asdex Upgrade Team, 2025, "The Low Frequency Edge Oscillation in Alcator C-Mod and ASDEX Upgrade I-Mode", https://doi.org/10.7910/DVN/UZUY8B, Harvard Dataverse, V1 |
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Citation |
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Title: |
The Low Frequency Edge Oscillation in Alcator C-Mod and ASDEX Upgrade I-Mode |
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Identification Number: |
doi:10.7910/DVN/UZUY8B |
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Authoring Entity: |
W. McCarthy, A. E. Hubbard, J. Terry, B. Labombard, A. Kuang, R. Bielajew, I. Hutchinson, J. W. Hughes, D. Silvagni, T. Happel, L. Gil, The Alcator C-Mod Team, The Asdex Upgrade Team |
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Distributor: |
Harvard Dataverse |
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Holdings Information: |
https://doi.org/10.7910/DVN/UZUY8B |
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Study Scope |
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Keywords: |
Physics, AUG, C-Mod, geodesic acoustic mode, I-mode, Mirror Langmuir Probe, tokamak |
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Abstract: |
The Low Frequency Edge Oscillation (LFEO) is a low frequency fluctuation in many plasma quantities in the pedestal region of the I-Mode confinement regime. It is observed on Alcator C-Mod between 10-30kHz and on ASDEX Upgrade between 5-10kHz. On both tokamaks it has been previously identified as a Geodesic Acoustic Mode (GAM), however the recent discovery of the Edge Temperature Ring Oscillation (ETRO) in a similar frequency and spatial location as the LFEO in I-Modes on EAST has called this identification into question. In this paper we investigate the LFEO on C-Mod and AUG using a variety of different experimental techniques including spectral analysis, magnetic mode number analysis, localization, and direct measurement of the LFEO zonal structure and propagation using a Mirror Langmuir Probe. This investigation has reconfirmed the identification of the LFEO as a GAM and determined that it has several key differences from the ETRO. |
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Notes: |
<a href="http://library.psfc.mit.edu/catalog/reports/2020/24ja/24ja096/abstract.php">PSFC REPORT PSFC/JA-24-96</a><br /><br />Work related to C-Mod was supported by US DOE Award DE-SC0014264. Work related to ASDEX Upgrade has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No 101052200 - EUROfusion). The views and opinions expressed are however those of the authors only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. Some of the analysis work was carried out under NRC grant 31310021M0034.<br /><br />If this record does not contain the full text, then the manuscript has been embargoed by the publisher thus restricting open access for 12 to 24 months after publication. |
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