DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 70: Neutral Beam Current Drive Profile | ||
| Name: | C. Craig Petty ( |
Affiliation: | General Atomics |
| Research Area: | Heating & Current Drive | Presentation time: | Requested | Co-Author(s): | W. W. Heidbrink |
| Description: | Measure the NBCD profile by measuring the changes in the profiles of parallel current density and parallel electric field for co and counter injection. | ||
| Experimental Approach/Plan: | Compare co and counter injection at the same plasma density and electron temperature using repeat shots. Comparisons should be done for (1) all left sources, (2) all right sources, (3) high power (two sources), (4) low and high electron temperature using ECH, (5) low and high density using L-mode or H-mode edge. | ||
| Background: | The profile and scaling of NBCD has not been as well documented experimentally as ECCD or FWCD, mainly because it has not been possible previously to compare co and counter injection on the same day. Limited data from DIII-D has found cases where the measured NBCD profile was broader than theoretically predicted. Since the NBCD profile plays an important role in our AT scenarios, it is important to validate our theoretical models. | ||
| Resource Requirements: | NBI: Require 2 counter sources, and at least 3 co sources.
EC: Minimum of 5 gyrotrons. | ||
| Diagnostic Requirements: | MSE is critical. | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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