Select the Diagnostic Profiles

SNAPIN allows you to select more than one profile for each physical quantity to be passed to SNAP. For example, profiles of T_e(R) from Thomson scattering, and from 1st and 2nd harmonic ECE can be passed to SNAP. (You cannot, however, pass through two profiles from the same diagnostic, e.g., from a YS waveform and a YS UFILE.) There is a miscellaneous or other diagnostic for each physical profile (T_i(R), T_e(R), ...), which can be used to enter profiles from diagnostics which SNAP and SNAPIN don't know about yet. Finally, there is an option to construct a profile from a formula versus minor radius of the form (1-(r/a)^b)^c).

Only one profile for each physical quantity can be used by SNAP in its analysis; you specify this as the active profile. The others are for comparison only.

For each profile you select (e.g., T_e(R) from Thomson scattering), SNAPIN creates several arrays which will be written into the SNAP.DAT file and thereby passed into SNAP. SNAP\ creates a number of additional arrays based on these input arrays; some are simply smoothed or mapped versions of the input data, while others are computed arrays. The arrays created by SNAPIN for each profile include:

1. A raw profile which contains the original array of dependent data (e.g., electron temperature).
2. The major radius grid for the raw profile.
3. An error-bar array for the raw profile (if available).
4. A processed profile of dependent data (one which has been edited).
5. A major radius grid for the processed profile.
6. An error-bar array for the processed profile (if available).

• SNAPIN does not allow the user to modify the raw data (arrays 1,2,3 above)--they are passed onto SNAP in order to maintain a record of the original data. The raw data is not used in any of SNAP's calculations: it is simply passed from SNAPIN directly through SNAP to the SNAP archives.
• For n_e(R), T_e(R), and T_i(R), data points < 0 are automatically removed from the processed profile.
• The user may edit the processed arrays using a variety of editing capabilities in SNAPIN. Usually this involves deleting data points that the user deems spurious (see section 3.7.3).
• Smoothing of the data in major radius can either be performed in SNAPIN (see sections 3.7.2 and  3.7.4), in which case the processed profile contains smoothed data, or it can be performed in SNAP in which case the processed profile contains unsmoothed data.

 
• The Profile Menus
• Graphical Editing of Diagnostic Profiles
• Comments on Editing Diagnostic Profiles
• Smoothing Diagnostic Profiles
• Deglitching Diagnostic Profiles
• Mapping Diagnostic Profiles
• Density Normalization
• The Radiated Power Profile