DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 234: Mach number scan for transport validation studies | ||
| Name: | Christopher Holland ( |
Affiliation: | University of California, San Diego |
| Research Area: | Transport Model Validation | Presentation time: | Requested | Co-Author(s): | G. R. Tynan, G. R. McKee, M. W. Shafer, A. E. White, T. Rhodes, J. DeBoo, R. Prater, G. Staebler, J. Kinsey,R. E. Waltz, J. Candy |
| Description: | The goal of this experiment would be to revisit previous Mach number scaling experiments (shots 126284-8, 126295-299) to obtain a comprehensive characterization of fluctuations across the plasma, as well as improved profile measurements. The results would then be used to carry out detailed validation studies of transport codes such as GYRO. | ||
| Experimental Approach/Plan: | Follow run plan from original shots, taking multiple discharges at each condition to allow radial profiles of density and Te fluctuations to be obtained via BES and CECE. Shots would be run in inner-wall limited plasmas, preferably up-down symmetric profiles. | ||
| Background: | Previous Mach number scan experiments were hampered by difficulty in matching profiles, and profile measurements were not sufficiently accurate for modeling with transport codes. However, validating these codes for both strongly and weakly rotating plasmas is essential for extrapolating to ITER. A significant limitation of the earlier experiments was the (unknown at the time) effect of low-rotation on power thresholds, which is better understood today. | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | Complete profile and fluctuation measurements | ||
| Analysis Requirements: | TGLF/GYRO/fluctuation and transport analysis | ||
| Other Requirements: | -- | ||
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