DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 52: Determination of ITER LH Threshold power | ||
| Name: | Punit Gohil ( |
Affiliation: | General Atomics |
| Research Area: | General IP | Presentation time: | Not requested | Co-Author(s): | -- |
| Description: | To Determine the threshold power requirements for obtaining H-mode plasmas in ITER. Vary the input power for ITER-like conditions (density, shape, low toroidal rotation, etc.) using a mix of auxiliary heating relevant to ITER (ECH and NBI). | ||
| Experimental Approach/Plan: | Set up the discharges at conditions relevant to ITER (i.e. low toroidal rotation, density and collisionality, shape, etc.). Vary the input power using auxiliary heating systems relevant to ITER (i.e. mostly ECH with NBI to maintain the relevant toroidal rotation conditions). Perform power scans at these ITER-like heating conditions for different plasma parameters in order to determine a scaling relationship that can be used to accurately predict the ITER LH threshold power requirements. | ||
| Background: | Recent experiments on DIII-D have showed that the LH threshold power is dependent on the edge toroidal rotation. This has strong implications for ITER, which is expected to operate with low toroidal rotation. However, most of the scaling studies for the LH threshold power (and their extrapolation to ITER) have been performed with discharges with mostly co-driven NBI with significant toroidal rotation, which could lead to an inaccurate prediction for ITER. This experiment is aimed at determining the LH threshold power for ITER by using heating methods relevant to ITER and at ITER relevant conditions in order to reduce the uncertainty in the prediction for ITER. | ||
| Resource Requirements: | 4 co beams, 2 counter beams, 4-5 gyrotrons | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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