1 / 5

NTM research opportunities

NTM research opportunities. Presented by D. A. Gates At the MHD SFG meeting August 25, 2005. Motivation. Neoclassical tearing modes are recognized as potentially performance limiting for ITER ITER Physics Basis, Chapter 3.2 Nucl. Fusion 39 (1999) 2251-2389

leanne
Download Presentation

NTM research opportunities

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NTM research opportunities Presented by D. A. Gates At the MHD SFG meeting August 25, 2005

  2. Motivation • Neoclassical tearing modes are recognized as potentially performance limiting for ITER • ITER Physics Basis, Chapter 3.2 Nucl. Fusion 39 (1999) 2251-2389 • 2/1 NTMs have can lock and cause disruptions • 3/2 NTMs degrade confinement. • There is not a demonstrated ability to predict mode onset from first a first principles theory • Most existing analysis is based on high aspect ratio circular cross-section theory (even for STs!)

  3. NTM modeling developments • Real geometry • Rosenberg, AL, Gates, DA, Pletzer, A, et al.  Modeling of neoclassical tearing mode stability for generalized toroidal geometry PHYS PLASMAS 9 (11): 4567-4572 NOV 2002 • Also see work by D. Brennan • Onset criteria • Calculate D’ • Evaluate threshold models (e.g. ion polarization current model and c/ c|| model)

  4. New research opportunities • Include effects of rotation (and shear) on stability • Non-linear effects • FIR (Frequently interrupted regime) (S. Gunther, et al.) • effect of NTMs on confinement • Effect of island size on rotation • Mode coupling • Kinetic models for mode onset

  5. JET-ITER collaboration • The arbitrary geometry code developed by Adam Rosenberg would be a useful contribution to JET-ITER • This would require ~1 man-year of effort to develop the code as a more robust tool

More Related