A new matching solution method for stability analysis of MHD mode with a singular layer including finite Larmor radius effects
Event details
| Date | 25.07.2012 |
| Hour | 10:30 › 11:30 |
| Speaker | Prof. Masaru Furukawa, Dept. of Advanced Energy, Division of Transdisciplinary Sciences, Graduate School of Fontier Sciences, The University of Tokyo, Japan |
| Location |
PPB 019
|
| Category | Conferences - Seminars |
We have developed a new matching method for stability analysis of MHD mode with a singular layer such as tearing and internal kink modes. The new method enables us to avoid some difficulties inherent in the traditional matched asymptotic expansion.
One of the key ingredients of our new method is the utilization of an inner region with a finite width. Then we do not need to take care of the singular nature of the problem and can avoid the difficultes.
The other one is an ordering scheme in the outer region. This enables us to include higher-order effects such as resistivity and inertia there. We have shown that this inclusion is crucially importnat for internal kink modes.
Recently we have extended this method to include finite Larmor radius (FLR) effect. In the seminar, I will explain how to construct the ordering scheme in the outer region including FLR effect, and will show numerical results which demonstrate success of the method.
One of the key ingredients of our new method is the utilization of an inner region with a finite width. Then we do not need to take care of the singular nature of the problem and can avoid the difficultes.
The other one is an ordering scheme in the outer region. This enables us to include higher-order effects such as resistivity and inertia there. We have shown that this inclusion is crucially importnat for internal kink modes.
Recently we have extended this method to include finite Larmor radius (FLR) effect. In the seminar, I will explain how to construct the ordering scheme in the outer region including FLR effect, and will show numerical results which demonstrate success of the method.
Practical information
- Expert
- Free
Organizer
- CRPP
Contact
- Paolo Ricci