Variables output from EFIT may be in several output files: A EQDSK File A EQDSK provides various global plasma parameters of interest. Variables: --------- AAQ1: minor radius of q=1 surface in m, 100 if not found AAQ2: minor radius of q=2 surface in m, 100 if not found AAQ3: minor radius of q=3 surface in m, 100 if not found ALI: li with normalization average poloidal magnetic defined through Ampere's law ALPHA: Shafranov boundary line integral parameter AOUT: plasma minor radius in m AREAO: cross sectional area in m2 BCENTR: vacuum toroidal magnetic field in Tesla at RCENCM BETAP: poloidal b with normalization average poloidal magnetic BPOLAV defined through Ampere's law BETAPD: diamagnetic poloidal b BETAT: toroidal b in % BETATD: diamagnetic toroidal b in % BPOLAV: average poloidal magnetic field in Tesla defined through Ampere's law BTAXP: toroidal magnetic field at magnetic axis in Tesla BTAXV: vacuum toroidal magnetic field at magnetic axis in Tesla CCBRSP: computed external coil currents in Ampere CDFLUX: computed diamagnetic flux in Volt-sec CHIGAMT: total chi2 MSE CHIPRE: total chi2 pressure CHIPRE: total chi2 pressure CJ1AVE: normalized average current density in plasma outer 5% normalized poloidal flux region CJOR0: normalized axial flux surface average current density CJOR95: normalized flux surface average current density at 95% of normalized poloidal flux CJOR99: normalized flux surface average current density at 99% of normalized poloidal flux CPASMA: fitted plasma toroidal current in Ampere-turn CPROF: current profile parametrization parameter CSILOP: computed flux loop signals in Weber DCO2R: line average electron density in m3 from radial CO2 chord DCO2V: line average electron density in m3 from vertical CO2 chord DOUTL: upper triangularity DOUTU: upper triangularity ECCURT: measured E-coil current in Ampere ELONGM: elongation at magnetic axis EOUT: Plasma boundary elongation FEXPAN: flux expansion at x point FEXPVS: flux expansion at outer lower vessel hit spot FLUXX: measured diamagnetic flux in Volt-sec JFLAG: error flag, 0 for error LFLAG: error flag, > 0 for error LIMLOC: plasma configuration. IN, OUT, TOP, and BOT for limiter configurations limited at inside, outside, top, and bottom. SNT, SNB, and DN for single null top, single null bottom, and double null configurations. MAR for marginally diverted configurations. MCO2V: number of vertical CO2 density chords MCO2R: number of radial CO2 density chords JFLAG: error flag, 0 for error OBOTT: plasma bottom gap in m OBOTS: bottom gap of external second separatrix in m OLEFT: plasma inner gap in m OLEFS: inner gap of external second separatrix in m ORIGHT: plasma outer gap in m ORIGHS: outer gap of external second separatrix in m ORING: not used OTOP: plasma top gap in m OTOPS: top gap of external second separatrix in m PASMAT: measured plasma toroidal current in Ampere PBINJ: neutral beam injection power in Watts PP95: normalized P'(y) at 95% normalized poloidal flux PSURFA: plasma boundary surface area in m2 PSIREF: reference poloidal flux in VS/rad QMERCI: Mercier stability criterion on axial q(0), q(0) > QMERCI for stability QMFLAG: axial q(0) flag, FIX if constrained and CLC for float QOUT: q at plasma boundary QPSIB: q at 95% of poloidal flux QQMAGX: axial safety factor q(0) QQMIN: minimum safety factor qmin QSTA: equivalent safety factor q* RCENCM: major radius in m for vacuum field BCENTR RCO2R: path length in m of radial CO2 density chord RCO2V: path length in m of vertical CO2 density chord RCURRT: major radius in m of current centroid RMIDIN: inner major radius in m at Z=0.0 RMIDOUT: outer major radius in m at Z=0.0 RMAGX: major radius in m at magnetic axis RQQMIN: normalized radius of qmin , square root of normalized volume ROUT: major radius of geometric center in m RSEPS: major radius of x point in m RTTT: Shafranov boundary line integral parameter RVSIN: major radius of vessel inner hit spot in m RVSOUT: major radius of vessel outer hit spot in m S1, S2, S3: Shafranov boundary line integrals SEPEXP: separatrix radial expansion in m SEPLIM: > 0 for minimum gap in m in divertor configurations, < 0 absolute value for minimum distance to external separatrix in limiter configurations SEPNOS: radial distance in m between x point and external field line at ZNOSE SHEARB: magnetic shear at 95% enclosed normalized poloidal flux SIBDRY: plasma boundary poloidal flux in Weber/rad SIMAGX: boundary poloidal flux in Weber/rad at magnetic axis SLANTL: gap to lower outboard limiter in m SLANTU: gap to upper outboard limiter in m SSEP: outboard radial distance to external second separatrix in m for single null configurations. positive for double nulls or single top null and negative for single bottom null. SSI01: magnetic shear at 1% of normalized poloidal flux SSI95: magnetic shear at 95% of normalized poloidal flux TAUMHD: energy confinement time in s TAUDIA: diamagnetic energy confinement time in s TAVEM: average time in s for magnetic and MSE data TERROR: equilibrium convergence error TIME: time in s TSAISQ: total chi2 from magnetic probes, flux loops, Rogowskiand external coils VERTN: vacuum field index at current centroid VLOOPT: measured loop voltage in volt VSURFA: plasma surface loop voltage in volt, E EQDSK only VOUT: plasma volume in m3 WBDOT: time derivative of poloidal magnetic energy in Watt, E EQDSK only WBDOT: time derivative of poloidal magnetic energy in Watt, E EQDSK only WPDOT: time derivative of plasma stored energy in Watt, E EQDSK only WPLASMD: diamagnetic plasma stored energy in Joule XNDNT: plasma boundary indentation XNNC: vertical stability parameter, vacuum field index normalized to critical index value YYY2: Shafranov Y2 current moment ZCURRT: Z in m at current centroid ZMAGX: Z in m at magnetic axis ZOUT: Z of geometric center in m ZSEPS: Z of x point in m ZVSIN: Z of vessel inner hit spot in m ZVSOUT: Z of vessel outer hit spot in m ------------------------------------------------------------------------ G EQDSK Files ------------- The G EQDSK file contains information on P', FF', the flux on the rectangular grid used, q, the boundary, and the limiter contour. A right-handed cylindrical coordinate system (R, phi, Z) is used. The G EQDSK provides information on the pressure , poloidal current function, q profile on a uniform flux grid from the magnetic axis to the plasma boundary and the poloidal flux function on the rectangular computation grid. Information on the plasma boundary and the surrounding limiter contour is also provided. Variables --------- CASE: Identification character string NW: Number of horizontal R grid points NH: Number of vertical Z grid points Namelist OUT1: BCENTR: Vacuum toroidal magnetic field in Tesla at RCENTR CURRENT: Plasma current in Ampere FPOL: Poloidal current function in m-T, F = RBT on flux grid FFPRIM: FF'(psi) in (mT)2 / (Weber/rad) on uniform flux grid LIMITR: Number of limiter points NBBBS: Number of boundary points NQPSI: PPRIME: P'(psi) in (nt/m2) / (Weber/rad) on uniform flux grid PRES: Plasma pressure in nt / m2 on uniform flux grid PSIZR: Poloidal flux in Weber/rad on the rectangular grid points QPSI: q values on uniform flux grid from axis to boundary RBBBS: R of boundary points in meter RCENTR: R in meter of vacuum toroidal magnetic field BCENTR RDIM: Horizontal dimension in meter of computational box RLEFT: Minimum R in meter of rectangular computational box RLIM: R of surrounding limiter contour in meter RMAXIS: R of magnetic axis in meter SIMAG: poloidal flux at magnetic axis in Weber/rad SIBRY: poloidal flux at the plasma boundary in Weber/rad ZBBBS: Z of boundary points in meter ZDIM: Vertical dimension in meter of computational box ZLIM: Z of surrounding limiter contour in meter ZMAXIS: Z of magnetic axis in meter ZMID: Z of center of computational box in meter Namelist BASIS KPPFNC KPPKNT PPKNT PPTENS KFFFNC KFFKNT FFKNT FFTENS KWWFNC KWWKNT WWKNT WWTENS PPBDRY PP2BDRY KPPBDRY KPP2BDRY FFBDRY FF2BDRY KFFBDRY KFF2BDRY WWBDRY WW2BDRY KWWBDRY KWW2BDRY Namelist CHIOUT SAISIL SAIMPI SAIPR SAIIP Toroidal Current Density The toroidal current JT related to P'(psi) and FF'(psi) through JT (Amp/m2) = R P'(psi) + FF'(psi)/R also see https://fusion.gat.com/THEORY/efit/efit_outputs.html (comments/corrections to bdavis @pppl.gov)