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Dynamic SIMS - CasaXPS

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<strong>CasaXPS</strong> Manual 2.3.15 Rev 1.0<br />

Copyright © 2010 Casa Software Ltd<br />

To overlay a set of VAMAS blocks corresponding to a predefined compound,<br />

one of the entries in the element-table list for the compound is selected<br />

before pressing the Overlay Linked VBs button. A dialog window appears<br />

offering a threshold value, which represents the percentage of the maximum<br />

height intensity of the peaks in the experiment frame. Only peaks of intensity<br />

greater than the percentage specified on the dialog window will be included<br />

in the set of VAMAS blocks overlaid in the active tile.<br />

Constructing an Element Library File<br />

The element library file was constructed using the Ex M T button on the Exact<br />

Mass property page and three text files containing lists of chemical formulae.<br />

An example file containing formulae used to compute exact masses for<br />

library entries is as follows.<br />

To create a corresponding library file, select the text file via the File Dialog<br />

invoked by the Ex M T button.<br />

The base-name for the text file is used to assign a string to the Transition field<br />

in the resulting library file created when the Open button is pressed on the<br />

File Dialog window. The new library file appears in the directory where the<br />

original text file is located.<br />

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