Loading “Dayta” System Files (University of Bristol Interface Analysis Centre)
Spectra acquired by the Bristol “Dayta” system are stored as
sets of ACSII files with .SP_ file extensions. These files may be
connected to a particular experiment through an associated .seq file.
Sets of .SP_ spectrum files are listed in the .seq file together
with the any experimental information (e.g. etch times.)
There are two methods for loading Bristol files.
simplest method is to convert files that are listed in a .seq file.
All that is required is for the .seq file and all the .SP_
files listed within that file are located in the same sub-directory, then
the .seq file is selected through the “Convert to VAMAS file”
dialog window. If for any reason
the set of .SP_ files does not match the set listed in the .seq
file, then the .seq will need to be edited to remove or add entries
as necessary. The VAMAS file that results will include an experimental
variable for each spectrum loaded.
alternative method for loading the .SP_ files is to collect a set of these
files in a sub-directory and then enter a new filename in the “Convert to
VAMAS file” dialog window, but add an extension of .bri to the
specified name (Figure 1). All .SP_ files in the directory will be
read and appear in a single VAMAS file. The default action is that no
experimental variable it defined for each spectrum. As a consequence
spectra read will all appear in the same row in CasaXPS (i.e. in a format
suitable for quantification of high resolution spectra). If on the other
hand it would be more convenient to separate spectra by an experimental
variable then the new file name entered in the dialog window should be
followed by a –col string e.g. “newfile.bri –col” (omit the
quotation marks). The experimental variable is the index number determined
form the order in which the files are read.
Figure 1: Convert to VAMAS file dialog
window, where a .bri file extension has been specified. The result is a file
called newfile.vms containing all the .SP_ data files seen in the window.