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Once you've cloned the LCLS-II PSDM repository and built the executables therein, you can generate sample Xtc data files and use iPython and psana to inspect the structures therein.

Setting Up

Switch to PSDM conda Environment

Return to the PSDM conda environment, if necessary.

# At the top of the PSDM lcls2 git repo
user@host> bash
user@host-BASH> source ./setup_env.sh
(ps-0.1.2) [user@host-BASH]>

Generate a Sample Data File

Generate a file of simple Xtc-formatted dummy data.

# Usage: xtcwriter [-f <filename> -t -h]
(ps-0.1.2) [user@host-BASH]> xtcwriter -f test.xtc

Create a Basic psana Data Import Script

We need a simple script to execute in the iPython session.

from psana import DataSource

ds = DataSource('test.xtc')

for evt in ds.events():
	pass