The command "cxi.pyana" can be configured to display the diffraction images streamed from an XTC file.
Configuring the viewer
Add to the mod_view section of your pyana config file as follows:
[pyana] modules = my_ana_pkg.mod_view num-cpu = 1 [my_ana_pkg.mod_view] address = CxiDs1-0|Cspad-0 calib_dir = /reg/g/cctbx/sources/cctbx_project/xfel/metrology/CSPad/run4/CxiDs1.0_Cspad.0 dark_path = /reg/d/psdm/cxi/cxib9713/res/darks/r0001-Ds1-avg.pickle dark_stddev = /reg/d/psdm/cxi/cxib9713/res/darks/r0001-Ds1-stddev.pickle detz_offset = 555 # Suitable values depend on the repetition rate of the instrument. n_update = 120 n_collate = 60
The command is run as follows:
cxi.pyana -c myconfig_file.cfg /path/to/xtc/streams/e346-r0007-s0[0-4]-c00.xtc
The command will marshal together all events from streams 0-4 in run 7 of experiment 346. Those events with the CXI imaging detector with the given
address will be sent to the
mod_view module that displays images in a GUI. Dark subtraction is done with the files
dark_stddev that are described on the Preparatory steps wiki page.
Important parameters are:
n_update: GUI will only display every Nth event (every 120th image, in this example).
n_collate: GUI will display an average image over the last N events (last 60 events, in this example).
Critical step: Please press the Run/Pause (green) button in the GUI to make the action start.