This is not an existing instrument, but an example to show the use of the S(Q)-sample.

The file 'argon_like.dat' is created by an analytical function to give a S(Q) behaviour that 
looks similar to that of Argon.
To see the effect of the sample, the instrument can also be run using the file 'isotropic.dat'
which assigns S=1 in the whole Q range.