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SynRad released

SynRad is a new MC simulator for calculating flux and power distribution of synchroton radiation in geometries of arbitrary complexity. It has a similar interface to Molflow and both programs read each other's file formats. You can also export the flux distribution and use it as an outgassing map in Molflow.

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Try it out in the downloads section.

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Creating Outgassing maps

Recently two MolFlow users have been facing a similar problem:

One of them wanted to simulate outgassing due to beam loss, others had outgassing due to electrons in the system. In both cases, they had a distribution of outgassing that changed depending on the location. The only way to enter it to MolFlow was to create a matrix of facets, and define the outgassing rate one-by-one. A rather long and boring process.
 
So I decided to create a way of defining a spacial outgassing distribution. The key is the Explode command that existed already in Molflow.
 
First, you have to define how fine the outgassing matrix is by defining a regular mesh:
 
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Then we select the facet and issue the new "create outgassing map" command:
 
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Below you see a map of the facet. For each mesh element, you can manually set the outgassing value. Note that the edited cell's location is highlighted on the geometry (similar to texture plotter):
 
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Click image to magnify)
 
You can also paste values from the clipboard from Excel. The values are pasted to the right and bottom from the actual cell. Then you can define the desorption type (Uniform, Cosine, Cosine^N). Finally, if everything's ready, click Explode.
 
The exploded geometry highlights those facets that have a desorption now:
 
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To test that everything was well defined, add a mesh that counts desorbed molecules, and you'll see a nice colormap of the values you just entered:
 
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That wasn't hard, was it? Happy outgassing! ;)

Facet selection groups

If you have carefully selected a group of facets, let's say all part of a given structure, then you probably won't want to select them once again.

That's why the Memorize selection function was added, allowing you to create facet groups, which are saved with the geometry file.

To use it, simply select some facets, then use Selection menu / memorize selection (shortcut: CTRL+W), and give your selection a name.

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Geometry editor: Aligning objects

In the current version of Molflow, it is possible to insert a GEO, TXT or STL file to the current geometry. It is useful if we want to assemble a system from parts that are each represented by a file.

However, snapping the pieces together might be difficult, thus there is a new Facet align option.

To use it, select the object that we want to align.

Then open the Facet align dialog. Upon opening, the selection will be memorized:

 

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Object rotation

You can now select one or more facets, and rotate them by a given number of degrees, around an arbitrary axis:

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If you want to use the "define by 2 selected vertex" mode to define the rotation axis, you will have to select two vertices using the vertex selector tool.

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