9th ITPA Confinement Database and Modelling Topical Physics Group

meeting in St. Petersburg 1/5

NF paper on H-mode confinement DB3

Darren McDonald

9th ITPA Confinement Database and Modelling Topical Physics Group

meeting in St. Petersburg 2/5

Aims and overview

• Paper describes updates to and analysis of DB3 from 1994 – 2004.

• Data from 18 machines of different sizes and shapes.• DB now contains D-T, low A, dim. Scan… data

• + more data from range of divertors and high , n and Ip.

• Physics: shape, fuelling, core and edge, dimensionless parameters, comparison with 1d transport codes

• Statistics: error estimates, EIV, reducing correlations• Key aim of DB is ITER predictions: recommended

scalings

9th ITPA Confinement Database and Modelling Topical Physics Group

meeting in St. Petersburg 3/5

1. Introduction2. Changes to DB3 (Machine descriptions)3. DB3: subsets, errors, condition

4. E power law scalings (OLS, EIV,*)5. Two term models6. Other models: offsets, other vars, …7. ITER: scalings, intervals8. ConclusionA. Summary of new variables + link to website

Structure

9th ITPA Confinement Database and Modelling Topical Physics Group

meeting in St. Petersburg 4/5

Machine overviews

• Thank you: generally homogeneous (~1-2 pages)• Missing data

• Machine overview/reference: JT-60U, TFTR• Selection method: MAST• Diagnostics/analysis: DIII-D, NSTX, T-10• Pedestal data: AUG, C-Mod, DIII-D, JET, JT-60U• Refs: AUG, C-Mod, NSTX, TCV, TFTR

• Reduction• Refs and diagnostic description: JET

9th ITPA Confinement Database and Modelling Topical Physics Group

meeting in St. Petersburg 5/5

Conclusion

• Paper provides a discussion of construction and analysis work on DB3, including two term models

• This meeting:• discussion of pre-draft• some help with machine descriptions

• First full draft: November• Submission: early 2006