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ITPA – CDBM H-mode threshold database IGDBTH s ummary April 200 6 - Princeton. Yves Martin Centre de Recherches en Physique des Plasmas Association Euratom - Confédération Suisse Ecole Polytechnique Fédérale de Lausanne (EPFL) CH - 1015 Lausanne, S witzerland.
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ITPA – CDBMH-mode threshold databaseIGDBTH summaryApril 2006 - Princeton Yves Martin Centre de Recherches en Physique des Plasmas Association Euratom - Confédération Suisse Ecole Polytechnique Fédérale de Lausanne (EPFL) CH - 1015 Lausanne, Switzerland
Actions decided in St-Petersburg (and after) • Talk at the EFPW (12.2005, Padova) => done! • Threshold power and confinement predictions for DEMOs • New data => not done • Recommended scaling => done for EFPW, to be checked • IAEA 2006 abstract submission => not done • ne and Bt individual dependences => part. done for EFPW (ne) • H-mode WS 2005 paper (DMD) => published (PPCF 2006, A439)
DB status • Since … • No new data since last meeting • No change in the database • Current version of the database: • IGDBTH4v5 • Located on the server in Garching
Work done - Presentations • Y.Martin – Work on the DB for EFPW • Recommended scaling • 2 scalings: one with full dataset (s1), one with ITER like shape (s2) • Threshold power calculated for ne=0.5 and 1.1020 • s1: 31 & 42MW s2: 55 & 92MW • Density dependence • R.Maingi – Effect of gas fueling location on H-mode access in NSTX • HFS, eq.mid-plane gas injection => best reproducibility • Toroidal rotation might be responsible for the difference • T.Takizuka – Bt scan data for Threshold Database from JFT-2M • 6 discharges (Bt scan) to be sent to DB • T.Takizuka – Contribution from CHS to Threshold Database • 6 discharges (ne and Bt scans) to be sent to DB
Action list • New data • JFT-2M TT 31.08.06 • CHS TT 31.08.06 • NSTX SK 31.08.06 • MAST MV 31.08.06 • New version of DB (4v7) YM 30.09.06 • Recommended scaling • Release DB (4v6) with selection parameters YM 31.5 • Confirm data selection (individually /tokamaks) ALL 31.7 • Insert corrections / ‘1st estimation’ YM 31.8 • Estimate fit parameters ALL 15.10 • Discussion / release ALL next meeting • Other Work • Variation of ne and Bt dependence with tokamak size YM next meeting
Action list (cont’d) • Papers • NF paper – 1st draft YM Next meeting • Detailed description of data • Basic scalings • Dimensionless scaling • Influence of data selection • Influence of scaling parameters • Density dependence • Error in variables • Recommended scaling • H-mode Workshop 2007 • Paper on influence of aspect ratio