DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 232: Rho-star 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 repeat previous rho-star scaling experiments (101381/101391) to obtain a comprehensive characterization of fluctuations across the plasma. 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, but take multiple discharges at each condition to allow radial profiles of density and Te fluctuations to be obtained via BES and CECE. The main control would be a scan of toroidal field from 1 T to 2T, yielding a 1.6 rho-star variation with other dimensionless parameters held fixed. | ||
| Background: | The 101381/391 pair of rho-star scaling shots have proved to be one of the most fruitful experimental data sets for modeling with transport codes. Since those shots were taken, significant diagnostics upgrades and additions (esp. BES and CECE) now allow for a significantly increased characterization of the plasma turbulence, in both core and edge regions. With the recognition of code validation as a key priority for DIII-D, the shots represent a natural starting point for obtaining experimental data to serve as the basis for validation studies. As rho-star is also a key player in the amount of �??non-locality�?� in the plasma dynamics, obtaining detailed fluctuation measurements at different rho-star values would allow for testing of various �??turbulence spreading�?� theories. Furthermore, as analysis has revealed not all dimensionless parameters were as well-matched as hoped, and so a more successful overall matching is an additional goal of this experiment. | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | complete profile and fluctuation measurements | ||
| Analysis Requirements: | TGLF/GYRO/fluctuation and transport analysis | ||
| Other Requirements: | -- | ||
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