DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 296: Test neoclassical poloidal rotation prediction as a function of toroidal rotation speed | ||
| Name: | Keith Burrell ( |
Affiliation: | General Atomics |
| Research Area: | Rotation Physics | Presentation time: | Not requested | Co-Author(s): | W.M. Solomon, S.K. Wong |
| Description: | Test predictions of an extended version of neoclassical theory which
says that the poloidal rotation of ions in the plasma should vary as the the toroidal rotation changes | ||
| Experimental Approach/Plan: | Utilize QH-mode plasmas with modulated neutral beams for best rotation
measurements in a high temperature, H-mode plasma. Scan toroidal rotation by varying the co-counter beam mix. Investigate poloidal and toroidal rotation speed of various impurities: helium, carbon, neon and argon. | ||
| Background: | Measurements of carbon and neon poloidal rotation by Solomon et al.
[Phys. Plasmas 13, 056116 (2006)] showed a significant discrepancy between experimental measurements and the predictions of neoclassical theory embodied in the NCLASS code. Recently, S.K. Wong has pointed out that the standard neoclassical prediction for poloidal rotation needs to be modified when the main ions or the impurities are rotating at speeds comparable to their individual thermal speeds. In the experiment by Solomon et al, the carbon and neon impurities were rotating at near their thermal speeds. The goal of this experiment is to make a detailed test of this extension of neoclassical theory. | ||
| Resource Requirements: | Reverse Ip. | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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