Page History

...

The data recorded from the LCLS experiments are stored in xtc (eXtended Tagged Container) files. This online format consists of "datagrams", C structures which have a type (TypeId), a status (Damage)that have fileds like TypeId, Damage, source (Src) and extent (size). Xtc files are not indexed and does not provide random access. The only way to read it is using a special iterator (XtcIterator) and read the events seqencially, one shot at a time. The myana application does this loop for you, and you can customize the event() function to read out the information you want from the xtc file.

You can explore the contents of an xtc file by using the xtcreader or pyxtcreader utilities:

...