DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
Login | Review | Submit | Logout | Help
Questions about this website? Contact Andrew LeBlanc Questions about ROF? Contact Chuck Greenfield
| Title | 380: Calibrate separatrix deformation to ideal response theory | ||
| Name: | Ilon Joseph ( |
Affiliation: | University of California, San Diego |
| Research Area: | Error Fields | Presentation time: | Not requested | Co-Author(s): | AH Boozer, KH Burrell, TE Evans, JE Menard, RA Moyer, JK Park, MJ Schaffer |
| Description: | Test the ideal theory of linear MHD plasma response by measuring surface deformations through Te symmetry point and Er well minimum. | ||
| Experimental Approach/Plan: | Choose stable n=1,2,3 plasmas where ideal theory should be valid. Send rotating ~10Hz n=1,2 RMP field through to measure surface deformations via TS and CER systems. | ||
| Background: | The linear plasma response to external perturbations has recently been to shown by Park, et al Phys Rev Lett 2007, to greatly modify the normal magnetic field at the seperatrix for low order n=1,2,3 toroidal modes. Due to the RFA effect, the ideal theory predicts that the normal field at the separatrix, and therefore, the deformation of the last closed outer surfaces can be much larger than the values anticipated by vacuum calculations alone. The theory has already worked well for the prediction of locked mode onset and error field cancellation. Should the predicted surface deformation match well to experimental results, one would obtain a method for systematically correcting TS and CER data for the effect of both applied RMPs and intrinsic error fields. | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | TS working well and CER -- sweeps necessary
Cameras Langmuir Probes | ||
| Analysis Requirements: | ER, Kinetic EFIT, SURFMN, IPEC | ||
| Other Requirements: | -- | ||
Print this page