1 / 3

Magnetic Relaxation with Oscillating Field Current Drive on MST

Magnetic Relaxation with Oscillating Field Current Drive on MST. Doug Stone A.F. Almagri, G. Fiksel, K.J. McCollam, J.S. Sarff. Midwest Magnetic Fields Workshop • Madison, Wisconsin • April 2012. Oscillating Field Current Drive (OFCD).

edan-velazquez
Download Presentation

Magnetic Relaxation with Oscillating Field Current Drive on MST

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. Magnetic Relaxation with Oscillating Field Current Drive on MST Doug Stone A.F. Almagri, G. Fiksel, K.J. McCollam, J.S. Sarff Midwest Magnetic Fields Workshop • Madison, Wisconsin • April 2012

  2. Oscillating Field Current Drive (OFCD) • Fusion motivation - counter resistive dissipation of helicity to sustain plasma current in steady state using AC fields • Accomplished by application of sinusoidal poloidal and toroidal voltages: • Voltages add magnetic helicity to the edge • Unstable current profile expected to relax through dynamo processes • Physics motivation - unique test of magnetic relaxation

  3. Probe Measurement of Dynamo During OFCD • Dynamo alternates between increasing and decreasing current in the edge • The dynamo accounts for difference between and moderately well • There is mode activity associated with both positive edge current drive due to sawteeth and anti-drive due to OFCD • Relative mode amplitudes vary between sawteeth and anti-drive

More Related