DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 302: Diagnostic spatial cross calibration using edge sweeps in QH-mode | ||
| Name: | Keith Burrell ( |
Affiliation: | General Atomics |
| Research Area: | ELM Control & Pedestal Physics | Presentation time: | Not requested | Co-Author(s): | C. Holcomb, G.R. McKee, W.M Solomon |
| Description: | Perform spatial cross calibration of the CER, BES and MSE systems
using edge sweeps in QH-mode discharges | ||
| Experimental Approach/Plan: | Run QH-mode discharges like 128542 with edge sweeps which change
Rmidout from 2.29 m to 2.16 m. Tune the CER system to look at the Doppler-shifted D-alpha from the neutral beams. (BES and MSE already view this wavelength). Modulate the beams to obtain the needed data. The various beam combinations typically take 6 shots to complete. | ||
| Background: | In order to successfully combine data from the CER, BES and MSE
systems for edge plasma studies, we need to know the relative spatial calibration of these system to millimeter accuracy. This has been done before using edge sweeps in QH-mode plasmas. This calibration needs to be done again so that we can finally include the MSE views of the 210 beam and so we can recalibrate the BES system after the work done in the vent at the end of 2007. The MSE portion of the calibration is particularly important, since the relative location of the 210 system relative to the other MSE systems has never been established. | ||
| Resource Requirements: | Reverse Ip. 7 NBI sources | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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