| EPSRC Reference: |
GR/L95236/01 |
| Title: |
COUPLING OF TOROIDAL ALFVEN EIGENMODES TO LOW FREQUENCY MODES IN A TOKAMAK |
| Principal Investigator: |
Cairns, Professor RA |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Department: |
Mathematics and Statistics |
| Organisation: |
University of St Andrews |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 August 1998 |
Ends: |
31 May 1999 |
Value (£): |
39,500
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| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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The V.F. will examine the non-linear coupling between low frequency sound waves, drift waves etc in a tokamok and the higher frequency toroidal Alfven eigenmodes. The possibility of parametric or modulational type instabilities involving such coupling will be investigated and thresholds and growth rates estimated. The toroidal geometry of the tokamak plays a crucial role in the wave interactions to be investigated and makes the calculation of non-linear coupling and of its consequences very complicated. The V.F. will bring a good deal of experience in tokamak physics and in low frequency modes such as drift waves and ballooning modes where the toroidal geometry is important. The objective will be to obtain a comprehensive understanding of the ways in which TAE's, driven unstable by a-particles or fast ions, can interact transfer energy to the low frequency waves. Such effects may be a factor in limiting TAE amplitude. Also, the low frequency waves which are driven up might themselves affect plasma transport and containment. The results will be of value to the magnetic fusion community.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.st-and.ac.uk |