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Plasma State Component

Plasma State Component. Software Status. Current Version: 1.001; no recent updates. Implemented as 3 libraries layered over the NTCC library set: xplasma, pspline, … Location of plasma state libraries SWIM svn repository NTCC distribution (formal module is planned).

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Plasma State Component

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  1. Plasma State Component

  2. Software Status • Current Version: 1.001; no recent updates. • Implemented as 3 libraries layered over the NTCC library set: xplasma, pspline, … • Location of plasma state libraries • SWIM svn repository • NTCC distribution (formal module is planned). • New visualization application: cstate • Compare 2 or 3 states or view a single state.

  3. Near Term Upgrades • Add Torques (angular momentum sources). • Reduced Species List: • Many components don’t need full impurity charge state spectrum. • Reduced list for Z>2 elements, with 2 proxy elements at low & high end of impurity Z range • Zeff and Quasineutrality conserved. • Need to identify software component to maintain proxy element densities… • Plasma State could trigger off updates to do it.

  4. Likely Future Upgrades • C/C++ get/set access to state elements. • For FACETS; would help Python access also. • Representation of L. Zakharov ESI data: • Bicubic Hermite representation. • Existing internal spline representation can be converted without affecting applications. • New interface can be added to enable external control of Hermite node derivatives.

  5. Issue: Update Propagation • Long running jobs need stable set of binary executables: • Each run owns a private set of binaries? • This is done in TRANSP production system. • Avoid constraint on code development. • Many things will need to be added to the state over time: • How to minimize disruption to component developers?

  6. Issue: Machine Description • Add “Machine Description” section to plasma state? • Make loadable from database of namelists: “DIII_rev1”, “DIII_rev2”, “CMOD_rev1”, … • Leave elements modifiable by applications? • But prevent changes “after initialization”? • Who defines contents? Try for compatibility with EU ITM / CPO effort? • Components need this now.

  7. Issue: Fast Species Components • Support multiple co-existing fast specie components: “FP” & “FPMC” for example? • This gets ugly... • Separate non-Maxwellian species lists? • Different grids for each individual specie? • Two copies of summed quantities like PBE because state can’t know if FP or FPMC will compute it? This is hard on EPA. • Further discussion needed.

  8. Issue: Large State Data • Use of state for large data, 3d or more? • Such as fast particle distribution functions… • …and fast particle source distributions. • State interpolation tools limited to 3d at present. • File I/O with large data elements will be expensive: may want to split state into 2d and 3d+ subsets to manage performance.

  9. Other issues? • You tell me…

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