Naming Conventions for Profile Arrays

A quasi-standard has been devised to identify the profile arrays where name = QUANTITY:SOURCE:OPERATION.

• The QUANTITY prefix identifies what physical quantity is represented by the profile name. Some QUANTITY prefixes are: TI, TE, NE, V or VPHI, OM (for angular velocity), PR (for radiated power), and ZEFF.
  • An RR or ERR is added to the end of a QUANTITY to identify an error bar array, e.g., TIRR represents the error bar array for T_i(R), and VERR represents the error bar array for .
  • A single R is added to the end of a QUANTITY to identify it as the major radius grid for a profile, e.g., TIR identifies an array as the major radius grid for a T_i(R) profile.
• The SOURCE represents the origin of the profile. Typically it is a digraph from the measuring diagnostic, e.g., TS, YS, YM, YG, FM, SW (for CHERS), BR, and VB. Other SOURCE identifiers are MISC (for a miscellaneous source), FORM (for a profile entered as a formula), and USED (the active profiles used by SNAP).
• The OPERATION represents what numerical processing, if any, was performed on the array. The OPERATIONS include:
  1. _RAW Array (versus major radius) is a raw quantity, not processed in any way by SNAP or SNAPIN.
  2. _ERR Array of error bars (vs major radius) for a profile.
  3. _SM Profile array versus major radius that has been smoothed by SNAP.
  4. _ZC (zone-center) Profile array that has been smoothed in major radius, then mapped to minor radius.
  5. _ASYM Array containing the asymmetry of the profile. This is a function of minor radius. In some cases, the obsolete ZDIF identifier is used instead of ASYM.
  6. _MAP A zone-centered minor radius profile that has been mapped back to major radius.
  7. Nothing. A profile name that has no OPERATION characters normally represents the original processed array vs major radius as passed in from the SNAP.DAT file from SNAPIN, but without any SNAP processing. For example, TE_TS represents an array of T_e(R) from Thomson scattering that has been edited (processed) by SNAPIN, but which has not been smoothed by SNAP.

One minor convention is followed: a prefix Q generally implies a power density, P implies a volume-integrated power density, TD a torque density, and T a volume-integrated torque. There are exceptions of course to this rule, e.g., QNEO is the neoclassical q profile, and TI_1 is the temperature profile of the first ion species.