Abstract
An integrated numerical system is established to model time-dependent behavior of the neoclassical tearing mode (NTM) in a tokamak which solves the modified Rutherford equation (MRE) by coupling with plasma transport, equilibrium, heating and current drive. The MRE is formulated in a simple form to be well-suited for time-dependent simulations including a predictive purpose for the feedback controller design by coupling the electron cyclotron effect self-consistently. In particular the electron cyclotron heating (ECH) effect is newly included to the MRE in addition to the electron cyclotron current drive (ECCD) effect to investigate their impact to stabilize the NTM. The integrated numerical system is applied to experiments for benchmarking in which NTMs are stabilized by ECCD and by ECH at ASDEX Upgrade and TCV, respectively. The impact of ECCD and ECH on stabilizing NTMs is identified in the simulations.
| Original language | English |
|---|---|
| Pages (from-to) | 867-875 |
| Number of pages | 9 |
| Journal | Current Applied Physics |
| Volume | 16 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 1 2016 |
| Externally published | Yes |
Funding
The authors would like to thank Doohyun Kim for useful discussions and supports. The authors would also like to acknowledge the ASDEX and TCV team for their experimental support and for useful discussions. This research was supported by National R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (No. 2014M1A7A1A03045368 ).
| Funders | Funder number |
|---|---|
| Ministry of Science, ICT and Future Planning | 2014M1A7A1A03045368 |
| National Research Foundation of Korea |
Keywords
- ECH/CD
- Modified Rutherford equation
- Neoclassical tearing mode
- Time-dependent simulation
- Tokamak
