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ITM_FLUSH progress report An access layer for Equilibrium Data

ITM_FLUSH progress report An access layer for Equilibrium Data. Huw Leggate. Overview. Background Recap on Flush Where has ITM_FLUSH got to? How can it be used? Future work. Background.

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ITM_FLUSH progress report An access layer for Equilibrium Data

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  1. ITM_FLUSH progress reportAn access layer for Equilibrium Data Huw Leggate Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  2. Overview • Background • Recap on Flush • Where has ITM_FLUSH got to? • How can it be used? • Future work. Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  3. Background • ITM requirement for an easily installable machine and platform independent library to provide equilibrium related quantities and co-ordinate mapping. A black box interface for IMP#1. • The existing JET FLUSH library seemed an ideal starting point. • Initialised with one call • Provides a large number of geometric functions • Uses NAG routines to fit bicubic splines to equilibira • Detailed documentation available • Well used • Needed to be rewritten to make it platform and machine independent – some routines can be retained temporarily Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  4. What is ITM_FLUSH? • ITM FLUx Surface Handling • Shared or static library written in C with the goal of providing equilibrium quantities; derivatives, integrals, tangents. • ANSII C – platform independent… • Uses NAG routines to calculate Bi-cubic splines on a regular grid, input can be irregular. • Callable from C and Fortran • Entire project under source control on the ITM server - Garching Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  5. FLUSH structure • Flushinit reads data • Spline fitting and calculations are done in calculateFlushParameters • Data stored in structures that are accessed via get and set routines • User can pass data directly to Flush routines or to calculateFlushParameters. Ensures thread safety. Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  6. Flush – state of play • The “Engine” is complete – libITMflush.so • Used by JETTO at JET • Data Access routines • PPF • Eqdsk • MDSplus ITM database – phase3 • Directly as ITM structure in Fortran90 • Fixed Boundary data as ITM structure (F90) • Directly as Flux map • Some routines ported – libflush_routines.so • Units, FlushState Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  7. Current ITM_FLUSH tools (1) • First flushInit must be called, as in original flush • Flupn – provides Flux, Br and Bz components • Not that much really… • Also 1st and 2nd derivatives of flux • Values of F and q Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  8. Current ITM_FLUSH tools (2) • First flushInit must be called, as in original flush • Flusur – Flux surfaces and Br, Bz components • Flul – Tangents • Flusin – Equilibrium Integrals • Full range of get routines Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  9. Documentation, Installation and Testing • Manual is being written at present • Doxygen provides detailed information on each procedure • Installation must be done by hand but is simple. gcc and a Fortran compilier required. NAG is preferred. • Precompiler switches allow PPF, MDSplus and NAG to be removed • Basic test script uses an eqdsk file • In Garching SVN project • ITM_FLUSHhttp://solps-mdsplus.aug.ipp.mpg.de/wsvn/ITM_FLUSH/ Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  10. Doxygen Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  11. Using ITM_FLUSH • Initialise • flushInit(&igo,&ishot,&itime,&lunget,&iseq,uid,dda,&lunmsg,&ier, uidlen, ddalen); • Call initITMfixedboundary(equ,ierr) • ts_initProfiles(&rawData, &fittedData, tokData,npsi… • retVal = setFlushState(fs); • Call the routines /* Get coordinates on the midplane */ retVal = getMagAxis(&rMagAxis,&zMagAxis,&fluxMagAxis,&ierr); if(retVal > 0 ) return retVal; retVal = findMidPlaneLCFSIntersection(&rOuter, &rInner, &ierr); if(retVal > 0 ) return retVal; } /* Store r z and a values */ for(i=0;i<npoints;i++) { r[i] = rMagAxis + (i * (rOuter - rMagAxis) / (double)(npoints-1)); z[i] = zMagAxis; a[i] = (r[i] - rMagAxis)/(rOuter - rMagAxis); } retVal = flupn3(&npoints, r, z, flux, br, bz, bt, &ier); if(retVal > 0 ) return retVal; for(i=0;i<npoints;i++) { bpol[i] = (br[i] + bz[i]); printf("r = %f, flux = %f, Br = %f, Bz = %f, Bt = %f\n",r[i],flux[i],br[i],bz[i],bt[i]); } Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  12. Future • NAG problem still to be resolved – dierckx routines available – pspline? • Divertor/Limiter data format/access – defaults exist at JET • Addition of extra routines • Inverse and other coordinate systems – Inverse not a problem • C++ object wrappers • Extra language support (matlab, IDL, java… Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

  13. FLUSH tools • Return Flux - Flupn … • Mappings, tangents and intersections - Flul, Flups… • Projections onto midplane - Flupax, Fluqax… • Reconstructing surfaces - Flusur, Flusu2, Flusul • Reconstructing open flux lines - Flouter, Flseparatrix • Equilibrium and geometry integrals - Flugeo, Flusin, Flinte • Local derivatives - Flusht, Flut • Volume elements - Flushv, Fluvol, Flblow, Flul2b • Divertor data routines - First wall, List_div_designs Huw Leggate – ITM_FLUSH ITM, Garching, Sept 2007 (remote)

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