1. Code Name: ASTRA-ESC code system.
2. The scope: Transport studies combined with the scope of ESC
3. Developer: Grigory Pereverzev (IPP, Garching, Germany), Leonid E. Zakharov.
4. Users: LEZ, users of ASTRA.
5. Description: Tandem of transport and equilibrium codes.
6. Language: FORTRAN, C/CodeBuilder (Cb).
7. CodeControl: Real time interactive, organized by Cb, and ASTRA's configuration files and GUI.
8. Communications:Mutual inter process communication using Equilibrium Spline Interface in the shared memory. In addition to communication capacities of ESC, ASTRA produces output, PS and movie files.
9. Postprocessors: Other Cb-codes can read files from I/O database (the structure of records is common). Standard software for movie files.
10. Docs: Online-Help and code maintenance documentation is organized by Cb for ESC. Online-Help of ASTRA is through its GUI. Descriptions of models and references are inside the model files.
11. Web: for ESC
12. Versions: No version control for ESC. ASTRA keeps old versions, but with no special version control system for ASTRA. 13. NumModel: ASTRA: 1-D time dependent PDEs with adaptive time step. Specific executable model is build using configuration ASCII files. ESC: versatile 2-D equilibrium solver with many modes of operations.
14. OperModel Non-linear.
15. Reference: Pereverzev G.V. et al., IPP Garching Report, IPP5/98 February 2002.
16. Uniqueness: (a) Code talking regime of two independent codes; (b Merging full capacities of ESC and ASTRA with independent maintenance of two codes; (c) Call of equilibrium solver at each time step, poloidal magnetic flux as one of input profiles for ESC; (d) Fast and flexible framework for composition of transport models (two lines in the ASTRA configuration file impose the right boundary condition for plasma temperature, which several years long NTCC project failed to do and for which FACETS SciDAC project is spending $2M/year with no visible success.) Has or exceeds projected capacities of pTRANSP, is ready as a prototype code system for Real Time Forecaset of tokamak discharges.
17. Verification: Self-verified using time step adaptation.
18. Tangible results: Simulations of the CDX-U discharge in the LiWF regime; Prediction of 3 confinement regimes for LTX; Simulation of the LiWF burning plasma regime for ST1, ST2,ST3 and FFRF.
19. Limitations: Reasonably covers all basic needs of tokamak fusion in2-D equilibrium and transport simulations.
20. Externals: CodeBuilder.
21. Scalability: Not an issue.
22. Bottlenecks: Interface with separatrix limited plasma equilibrium and transport is not yet implemented.
23. Composition: Two independent codes interfaced through the inter process communications (shared memory).
24. Portability: Not an issue.
25. Performance: Characteristic time is 0.01-0.1 sec/time step.
26. Comments: N/A