Normal level of accuracy is ASDEX (± 1%), D3D (± 0.5%), JET (± 3%), JFT2M (± 3%), PBXM (± 3%), PDX (± 3%). AREA $ 3 $ m^2 $ poloidal cross sectional area $ Area of poloidal plasma cross section in m

AREA = &pi &kappa AMIN

NONE: | No Auxiliary heating |

NB: | Neutral Beam Injection |

IC: | Ion Cyclotron Resonance Heating |

EC: | Electron Cyclotron Resonance Heating |

LH: | Lower hybrid |

IBW: | Ion Bernstein Waves. |

SN: | Single null (generic) |

LSN: | Lower single null |

USN: | Upper single null |

DN: | Double null |

LIM: | Limiter (generic) |

TOP, BOT, OUT, IN: | description of limiter position |

IW: | Inner wall |

Normal level of accuracy is ASDEX (Na), D3D (± 10%), JET (±10%), JFT2M (± 10%), PBXM (± 25%), PDX (Na). $ ND DELTA95 $ 3 $ $ mean triangularity at 95 % poloidal flux $ The mean triangularity of the surface which encloses 95 % of the poloidal flux from an MHD equilibrium fit. $ NV DELTAL $ 3 $ $ lower triangularity $ The lower triangularity of the plasma boundary from an MHD equilibrium fit. $ NV DELTAL95 $ 3 $ $ lower triangularity at 95 % poloidal flux $ The lower triangularity of the surface which encloses 95 % of the poloidal flux from an MHD equilibrium fit. $ NV DELTAU $ 3 $ $ upper triangularity $ The upper triangularity of the plasma boundary from an MHD equilibrium fit. $ NV DELTAU95 $ 3 $ $ upper triangularity at 95 % poloidal flux $ The upper triangularity of the surface which encloses 95 % of the poloidal flux from an MHD equilibrium fit. $ NV DIPDT $ 3 $ A/s $ Time derivative of plasma current in A/s $ Time derivative of plasma current in A/s $ NV New variable, was called IPDOT in ITB database, Units should be A/s. DIVMAT $ 1 $ $ divertor material $ The material of the divertor tiles. Possible values are: SS for stainless steel, C or CC for carbon, TI1 or TI2 for titanium, BE for beryllium or C/BE for carbon at the top and beryllium at the bottom. DNELDT $ 3 $ m^-3/s $ time derivative of central line averaged electron density $ The time rate of change of NEL in m

Normal level of accuracy is similar to NEL. DNEVDT $ 3 $ m^-3/s $ time derivative of volume averaged electron density $ The time rate of change of NEV in m

BORO generic for boron |

BOROA (B_{2}H_{6} + CH_{4} + H_{2}) |

BOROB (B_{2}H_{6} + H_{2}) |

BOROC (B_{2}D_{6} + He) |

CARB generic for carbon |

CARBH (CH_{4} + D_{2}) |

TI for titanium |

BE for beryllium |

NONE for no evaporation. |

Normal level of accuracy is ASDEX (Na), D3D (Na), JET (Na), JFT2M (Na), PBXM (± 15%), PDX (Na). IP $ 3 $ A $ plasma current $ plasma current: +ve IP is anti-clockwise when viewed from above $ Q Sign was previously ambiguous, and data providers will have to check previous submissions ISEQ $ 1 $ $ parameter scan identifier $ Parameter scan identifier

Possible options for ASDEX are:

ISEQ | Explanation |

NONE | No particular scan |

G1 | Comparison shots for Helium program |

NE1 | Density variation |

HT1 | Search for high confinement times |

EF11 | Search for long ELM-free periods |

SP11 | Spectroscopic investigations |

HBE1 | High beta investigations, T_{i} profile measurements |

HBE2 | High beta investigations, T_{i} profile measurements |

HBE3 | High beta investigations, T_{i} profile measurements |

P1 | PNBI scan |

P2 | PNBI scan |

QC1P3 | QCYL and PNBI scan |

BT1 | BT scan |

BT2 P4 | BT and PNBI scan |

BT3 | BT scan |

BT4 | BT scan |

BT5 | BT scan |

BT6 | BT scan |

BT7 | BT scan |

Possible options for JFT2M are:

ISEQ | Explanation |

NONE | No particular scan |

AM1 | AMIN scan with Ip = 0.22MA (same Q95) |

IP1 | 1st Ip scan with Bt = 1.25T |

IP2 | 2nd Ip scan (Hydrogen) |

IP3 | 3rd Ip scan (Deuterium) |

BS1 | Scan of 801010 (CO or CTR) and 603010 (CO or CTR) |

BT1 | Bt scan with Ip = 0.16MA |

BT2 | Bt scan with Ip = 0.21MA |

EB1 | ENBI scan with BSOURCE = 603010 |

EB2 | ENBI scan with BSOURCE = 801010 |

G1 | Intense gas puff for comparison with H pellet H mode |

G2 | Intense gas puff for comparison with D pellet H mode |

G3IP2 | 2nd Ip scan (Hydrogen) with intense gas puffing |

G4IP3 | 3rd Ip scan (Deuterium) with intense gas puffing |

IE1 | IEML and PNBI scan looking for steady state H mode region |

P1 | PNBI scan by CO or CTR with Ip = 0.25MA |

P2 | PNBI scan by CO + CTR with Ip = 0.24MA |

P3IP4NE1 | PNBI , IP and NEL scan in Hydrogen plasma |

P4IP5NE2 | PNBI , IP and NEL scan in Deuterium plasma |

PE1 | Hydrogen pellet into Hydrogen plasma |

PE2 | Deuterium pellet into Deuterium plasma |

XP1 | XPLIM scan with Ip = 0.24MA |

No options available for D3D, JET, PBXM and PDX. ITB $ 1 $ $ ITB flag $ Flag for ITB conditions with possible values: "ITB" if an ITB is present, "PREITB" immediately before the ITB onset, and "NOITB" if no ITB is present $ NV New variable to flag ITB discharges ITBTIME $ 3 $ s $ Time of ITB triggering. $ Time of ITB triggering. $ NV ITBTYPE $ 1 $ $ Type of ITB. $ Type of ITB with possible values: "NONE", "TI", "TE", "NE", and concatenations of these (eg "TITENE") $ NV KAPPA $ 3 $ $ plasma elongation $The plasma elongation determined from an MHD equilibrium fit or a formula based on a number of equilibria (ASDEX). Normal level of accuracy is ASDEX (± 1%), D3D (± 1%), JET (± 5%), JFT2M (± 10%), PBXM (± 10%), PDX (k = 1 for all records, ± 10%). KAPPA95 $ 3 $ $ elongation at 95 % poloidal flux $ Elongation of the surface which encloses 95 % of the poloidal flux from an MHD equilibrium fit. $ NV LHFREQ $ 3 $ Hz $ LH frequency $ Frequency of LH waves in Hz. LHNPAR $ 3 $ $ LH parallel mode number $ LH parallel mode number. LI $ 3 $ $ internal inductance $ Internal plasma inductance (ideally from MHD equilibrium):

l

For JET NEL has been approximated by:

ohmic: NEL ~ exp {2.931 +0.873 log (NEV) + 0.064 log (NEØ)}

H-mode: NEL ~ exp {3.745 +0.825 log (NEV) + 0.092 log (NEØ)} If no measurement is available, the variable NELFORM indicates if NEL is measured or approximated.

Normal level of accuracy is ASDEX (± 2%), D3D (± 2 x 10

Normal level of accuracy is D3D (± 10%). ASDEX, JET, JFT2M,PBXM, PDX: Na. PELLET $ 1 $ $ Pellet material information and side of launch $ NONE if no pellets

H/D/LI for the pellet material

concatenated with injection field side (HFS, LFS) $ ND Extra information on launch side. PERFDUR $ 3 $ s $ duration of the high performance phase $ duration of the high performance phase, defined as the time (in s) during which the discharge has >85% of its maximum stored energy. This indicates how stationary the discharge is. $ NV PGASA $ 3 $ amu $ mean mass number of main plasma ions $ Mean mass number of the plasma ions. Values typically ranging from 1.0 to 3.0 in hydrogenic plasmas, and up to 4.0 in He plasmas $ ND PGASZ $ 3 $ $ mean charge number of main plasma ions $ Mean charge number of the main plasma ions. Values typically ranging from 1.0 in hydrogenic plasmas to 2.0 in Helium. $ ND PHASE $ 1 $ $ plasma phase $ The phase of the discharge at TIME. Possible values are:

OHM : | Ohmic |

L : | L-mode |

LHLHL : | H-mode with frequent L H transitions |

H : | ELM-free H-mode |

HSELM : | H-mode with small ELMs |

HGELM : | H-mode with large ELMs |

HELM : | H-mode with ELMs (generic) |

HGELMH : | H-mode with high frequency large ELMs |

HYB : | Hybrid regime |

VH : | VH-mode |

PEP : | PEP mode |

Normal level of accuracy is JET (± 10%). ASDEX, D3D, JFT2M, PBXM, PDX: Na. PIMPA $ 3 $ amu $ mass number of main impurity $ Mass number of the plasma main impurity. Possible values are: 8 (Beryllium), 10 (Boron), 12 (C), etc ... & C PIMPZ $ 3 $ $ charge number of main impurity $ Charge number of the plasma main impurity. Possible values are: 4 (Beryllium), 5 (Boron), 6(C), etc ... & C PINJ $ 3 $ W $ power injected by main neutral beam $ The injected neutral beam power with beam of (BGASA, BGASZ) that passes into the torus in watts. Zero if no beams are on. Notice total injected neutral beam power is PINJ + PINJ2.

Normal level of accuracy is ASDEX (± 10%), D3D (± 10%), JET (± 6%), JFT2M (± 5%), PBXM (±5%), PDX (± 10%). PINJ2 $ 3 $ W $ power injected by auxiliary neutral beam $ The injected neutral beam power from a second source with beam of (BGASA2, BGASZ2) in watts (JET only). Zero if no beams of second source are on.

Normal level of accuracy is JET (± 6%). ASDEX, D3D, JFT2M, PBXM, PDX: Na. PL $ 3 $ W $ uncorrected loss power $ Estimated Loss Power not corrected for charge exchange and unconfined orbit losses in watts.

ASDEX: PL = POHM + PNBI - DWDIA/3 - 2*DWMHD/3

D3D: PL = POHM + PNBI + PECH - DWMHD

JET: PL = POHM + PNBI + PICRH - DWDIA

JFT2M: PL = POHM + PNBI - DWDIA

PBXM: PL = POHM + PNBI - DWMHD

PDX: PL = POHM + PNBI - DWMHD

ASDEX, D3D, JET, JFT2M, PBXM, PDX: Co.

PLH $ 3 $ W $ LH power coupling to plasma $ LH power in watts coupled to the plasma. Zero if no LH is applied. PLTH $ 3 $ W $ loss power with correction for cx and orbit losses $ Estimated Loss Power corrected for charge exchange and unconfined orbit losses in Watts, i.e. PLTH = PL - PFLOSS.

ASDEX, D3D, JET, JFT2M, PBXM, PDX: Co. PNBI $ 3 $ W $ total injected beam power minus shine through $ Total injected neutral beam power minus shine through in watts. Zero if no beams are on.

Normal level of accuracy is ASDEX (± 10%),D3D (± 10%), JET (± 10%), JFT2M (<± 10%), PBXM (± 10%), PDX (± 10%). POHM $ 3 $ W $ Ohmic power $ Total ohmic power in watts.

ASDEX: | Determined from max {0, VSURF*IP}, (Ohmic: ± 5% H: ± 50%). |

D3D: | Calculated using CB_{10}I_{p}^{2}RGEO^{2}/(W_{T}n_{e}). B_{10} is the central visible bremsstrahlung signal. When n_{e }is determined from the radial (vertical) CO_{2}chord, C is equal to 1.03*10^{-19} (9.92*10^{-20}) (± 15%). |

JET: | Corrected for inductance effects (± 20%). |

JFT2M: | Calculated as VSURF*IP (± 10%). |

PBXM: | Calculated as VSURF*IP (± 50%). |

PDX: | Calculated using VSURF and IP corrected for inductance effects (± 20%). |

Normal level of accuracy is ASDEX (± 20%), D3D (± 15%), JET (± 10 15%), JFT2M (± 10 - 20%), PBXM (± < 25%), PDX (Na). PUMP $ 1 $ $ Status of divertor pump $ Status of divertor pump ('ON' or 'OFF') $ NV Q95 $ 3 $ $ safety factor at 95% poloidal flux $ The plasma safety factor from an MHD equilibrium fit evaluated at the flux surface that encloses 95% of the total poloidal flux. For ASDEX Q95 = q

Normal level of accuracy is ASDEX (± 15%), D3D (± 3%),JET (± 10%), JFT2M (± 10%) PBXM(±10%), PDX (± 10%). QAXIS $ 3 $ $ central safety factor on the magnetic axis $ central safety factor on the magnetic axis $ C QFOOT $ 3 $ $ safety factor at an ITB foot $ safety factor at an ITB foot $ NV QMIN $ 3 $ $ Minimum safety factor $ Minimum safety factor $ C RFOOT $ 3 $ $ &rho corresponding to the ITB foot $ &rho corresponding to ITB foot $ NV Definition of foot needed to guide dataproviders RGEO $ 3 $ m $ geometric axis $ The plasma geometrical major radius in meters, from an MHD equilibrium fit, defined as the average of the minimum and the maximum radial extent of the plasma at the elevation of the magnetic axis.

Normal level of accuracy is ASDEX (± 0.5%), D3D (± 0.6%) JET (± 1%), JFT2M (± 0.75%), PBXM (± 0.65%), PDX (± 0.75%). RICRES $ 3 $ $ Normalised minor radius (&rho) of ICRH deposition. $ Normalised minor radius (&rho) of ICRH deposition. $ NV RLHDEP $ 3 $ $ Normalised minor radius (&rho) of lower hybrid deposition. $ Normalised minor radius (&rho) of lower hybrid deposition. $ NV RMAG $ 3 $ m $ magnetic axis $ The major radius of the magnetic axis in meters from an MHD equilibrium fit or a formula based on a number of equilibria (ASDEX).

Normal level of accuracy is ASDEX (± 0.5%), D3D (± 1%), JET (± 2%), JFT2M (±2%), PBXM (± 1%), PDX (± 4%). RQMIN $ 3 $ $ &rho corresponding to the minimum in safety factor, QMIN. $ &rho corresponding to the minimum in safety factor, QMIN. ( &rho is the normalised flux surface label proportional to the square root of the toroidal flux ) $ C RSHOULD $ 3 $ $ &rho corresponding to an ITB shoulder $ &rho corresponding to an ITB shoulder $ NV Definition of shoulder needed to guide dataproviders RSMIN $ 3 $ $ &rho of the surface with minimum magnetic shear $ &rho of the surface with minimum magnetic shear $ C SELDB $ 2 $ $ $ Sequence of binary flags stored as a 10 digit integer: abcdefghij. These digits carry the following information

a | 1 if MSE available in equilibrium reconstruction, 0 otherwise |

b | 1 if profile data is available, 0 otherwise |

c-j | no definitions at present, so set to 0 |

Normal level of accuracy is ASDEX (± 1 cm), D3D (± 0.5 cm), JET (± 1 cm), JFT2M (± 1 cm), PBXM (± 0.5 cm), PDX (± 1 cm). SFOOT $ 3 $ $ magnetic shear at ITB foot $ magnetic shear (defined as s=&rho/q dq/d&rho where &rho is the square root normalised toroidal flux coordinate) at ITB foot $ NV SHEAR $ 1 $ $ sign of magnetic shear inside ITB radius $ General sign of the magnetic shear inside ITB radius with allowed values: "NE", "WE", "PO" for negative, weak and positive shear respectively $ NV How do you define weak shear etc? SHOT $ 1 $ $ shot # $ The shot from which the data are taken. SPLASMA $ 3 $ m^2 $ area of outermost magnetic surface $ Area of outermost magnetic surface in m

AREA=4&pi AMIN RGEO ((1+&kappa

STEADY : | All global paramaters are in steady state |

TRANS : | At least one parameter is evolving |

TAUTH1=WKIN/(POHM+PNBI+PICRH+PECH+PLH+PIBW-DWKIN)

where DWKIN is the time derivative of the stored thermal energy as estimated from kinetic measurements$ NV TAUTOT $ 3 $ s $ total energy confinement time $ Estimated total energy confinement time (WTOT/PLTH) in seconds. TE0 $ 3 $ eV $ central Te $ The electron temperature at the magnetic axis in eV.

ASDEX: | From 16 radial YAG measurements under the same profile assumptions as for TEV (± 10%). |

D3D: | Determined by a spline temperature profile fit to the Thomson scattering data (± 10%). |

JET: | From ECE temperature profile (± 10%). |

JFT2M, PBXM, PDX: | Na. |

D3D: | Determined by a spline temperature profile fit to the charge exchange recombination data (± 10%). |

JET: | From Crystal X-ray diagnostic (±10%) or from charge exchange recombination spectroscopy (± 10%). |

ASDEX, JFT2M, PBXM, PDX: | Na. |

Normal level of accuracy is ASDEX (± 3%), D3D (± 3%),JET (± 6%), JFT2M (± 5%), PBXM (± 10%), PDX (±5%). VSURF $ 3 $ V $ loop voltage $ The loop voltage at the plasma boundary in volts.

Normal level of accuracy is ASDEX (± 5%), D3D (Na),JET (± 5%), JFT2M (± 5%), PBXM (±50%), PDX (± 10%). VTO95 $ 3 $ m/s $ Toroidal velocity at 95% poloidal flux surface in m/s. $ Toroidal velocity at 95% poloidal flux surface in m/s. $ NV VTOAXIS $ 3 $ m/s $ Toroidal velocity on axis in m/s. $ Toroidal velocity on axis in m/s. $ NV VTOFOOT $ 3 $ m/s $ Toroidal velocity at the ITB foot in m/s. $ Toroidal velocity at the ITB foot in m/s. $ NV WALMAT $ 1 $ $ wall material $ The material of the vessel wall. Possible values are: SS for stainless steel, IN for inconel, IN/C for Inconel with carbon, CSS for (partly) Carbon on stainless steel, or C for generic carbon. $ ND WDIA $ 3 $ J $ Total plasma energy in Joules as determined from the diamagnetic loop. $ Total plasma energy in Joules as determined from the diamagnetic loop. $ NV WFANI $ 3 $ $ fraction of fast ion energy in perpendicular direction $ Estimate of fraction of perpendicular fast ion energy as compared to the totalfast ion energy due to NBI.

If WFPER and WFPAR are available WFANI = WFPER/(WFPER + WFPAR), otherwise:

ASDEX: | From regression analysis based on 176 FREYA runs: C NEL ^{0.04}(NE0(ZEFF-1))^{0.045}/ENBI^{0.14} for H beam and C'NEL^{0.12}(NE0(ZEFF-1))^{0.020}/ENBI^{0.14} for D beam where C and C' are estimated constants depending on the target gas. Missing central densities are interpolated by regression of the available central densities in the database against IP, BT, NEL, NEV, EVAP and PINJ. If not measured, ZEFF is assumed to be 3 for EVAP=NONE, 2.5 for carbonised shots and 1.5 for boronised shots. |

D3D: | The fast ion anisotropy is calculated only from geometry; the angles of the beam center line are known relative to the geometric axis of the tokamak and from this the perpendicular and parallel components can be determined. |

JET: | 1.16*10^{-2}NEL^{0.11}/ENBI^{0.07}. |

Normal level of accuracy is JET (± 50%). ASDEX, D3D, JFT2M, PBXM, PDX: Na WKIN $ 3 $ J $ Total thermal plasma energy in Joules as determined from kinetic measurements. $ Total thermal plasma energy in Joules as determined from kinetic measurements. $ NV WMHD $ 3 $ J $ Total plasma energy in Joules as determined from an MHD equilibrium fit. $ Total plasma energy in Joules as determined from an MHD equilibrium fit. $ NV WTH $ 3 $ J $ thermal plasma energy content $ Estimated thermal plasma energy content in Joules.

ASDEX: WTH = WDIA - 1.5*WFANI*WFFORM.

D3D: WTH = WMHD - WFFORM.

JET: WTH = WDIA - 1.5 (WFPER + WFICRH). If WFPER is missing WFPER is replaced by WFANI* WFFORM.

JFT2M: WTH = WDIA/3 + 2*WMHD/3 - WFFORM.

PBXM: WTH = WMHD - 0.75*WFPER - 1.5*WFPAR.

PDX: WTH = WMHD - 0.75*WFPER - 1.5*WFPAR.

ASDEX, D3D, JET, JFT2M, PBXM, PDX: Co. WTOT $ 3 $ J $ total plasma energy content $Estimated total plasma energy content in Joules.

ASDEX: WTOT = WTH + WFFORM.

D3D: WTOT = WMHD

JET: WTOT = WTH + WFPER + WFPAR + WFICRH.

If WFPER and WFPAR are missing they are replaced by WFFORM.

JFT2M: WTOT = WTH + WFFORM

PBXM: WTOT = WTH + WFPER + WFPAR

PDX: WTOT = WTH + WFPER + WFPAR

ASDEX, D3D, JET, JFT2M, PBXM, PDX: Co. XPLIM $ 3 $ m $ minimum separation between Xpoint and limiter/wall $ The minimum distance between the X-point and either the vessel walls or limiters in meters from an MHD equilibrium fit. The value is positive if X-point is inside either the vessel wall or limiters.

Normal level of accuracy is ASDEX (Na), D3D (± 3 cm), JET (± 5 cm), JFT2M (± 3 cm), PBXM (± 5 cm), PDX (± 5 cm). ZEFF $ 3 $ $line averaged effective charge $ Line average plasma effective charge determined from visible bremsstrahlung.

Normal level of accuracy is ASDEX (± 10%), D3D (± 20%), JET (± 30%). JFT2M, PBXM, PDX: Na. ZMAG $ 3 $ m $ Vertical position of magnetic axis in m $ Vertical position of magnetic axis in m $ NV