&CELL: FIELD-MAP: FILES

contents

• field maps of which the format can not be identified automatically, such as ANSYS-plane-121; ANSYS-solid-123; Tosca, Tosca-118, Maxwell-2D-SV, COMSOL-2D-LINEAR, COMSOL-2D-QUADRATIC (formerly called FEMLAB-2D), COMSOL-3D-LINEAR, COMSOL-3D-QUADRATIC (formerly called FEMLAB-3D), QuickField
• files that contain a weighting field.

In case Maxwell Field Simulator has been used to generate the maps, identifying the mesh directory is recommended. The contents is optional for all other types of data written by Maxwell programs.

A warning is issued if the file contains other data than the declared contents.

Currently, the following contents types are recognised:

Additional information on:

file

These files are usually written by other programs than Garfield, and they therefore do not follow internally the Garfield format conventions. For notes on the way dataset names should be supplied to Garfield, see the guidelines for Garfield files.

For recipes for making these files, refer to the file format descriptions.

label

The label is a single upper case alphabetic character which serves two purposes:

1. The label links a weighting field with solids. For this association, the weighting field label should match one or more labels used in the SOLIDS listing. A solid label should not match more than one weighting field label, unless the signals for these weighting fields are summed.

   In the absence of a match, e.g. because no solids have been entered, all signals on the weighting field map are classified as cross induced. Such signals are only computed if the CROSS-INDUCED option is active.

2. The label identifies the weighting field to the SELECT statement, a prerequisite for the computation of signals in the electrodes for which the weighting field has been computed.

As for all finite element field maps, weighting field maps can be entered both in the cell section and in the optimisation section. When the main field is computed using a finite element program, then the weighting fields are entered, together with the main field, in the cell section. Entry of a weighting field in the optimisation section is used for weighting_field example when the main field can be calculated nearly exactly from wires and planes, while the shape of the read-out electrodes (typically pads) is such that the weighting field is more easily calculated using finite elements.

[By default, the label "S" is assigned to weighting field maps, which makes these maps are part of the initial, default, selection.]

format

• ANSYS-plane-121;
• ANSYS-solid-123;
• Tosca, from Vector Fields;
• Tosca-118,
• QuickField;
• COMSOL-2D-LINEAR;
• COMSOL-2D-QUADRATIC, formerly called FEMlab-2D;
• COMSOL-3D-LINEAR;
• COMSOL-3D-QUADRATIC, formerly called FEMlab-3D;
• Parameter-Extractor-2D, from Ansoft;
• Parameter-Extractor-3D, from Ansoft;
• Field-Simulator-3D, from Ansoft;
• Maxwell-2D-SV, from Ansoft;
• Maxwell-11, from Ansoft.

The layout of the field maps for the various Maxwell versions is so similar that Garfield can only rarely tell which version has been used. As of version\ 11, the situation is even worse in that the layout of version\ 9 and version\ 11 files is identical, but the node numbering sequence is different. It is therefore advisable to systematically specify the format explicitly.

Additional information on:

Formatted on 21/01/18 at 16:55.