1. About this tutorial

The main objective of this session is to introduce and to explain the new Python interface for accessing LCLS data from analysis applications. The new software framework is known as the "Interactive psana" or just ipsana. The first idea of implementing such tool was suggested around 1 and a half years ago at the joint PCDS/SRD meeting (look for ipsana). Though its underlying machinery is largely based on the batch version of psana the interface to the data is much simple, more intuitive, and it requires much less code to be written by a user in order to get to "that CSPad image" (EPICS PV, etc.). The new framework won't work for everyone, especially for those users who have either heavily invested into the modular code of the batch frameworks, or who needs the performance of modules written in C++. Still our intent is to demonstrate the power of the new approach and to encourage using the tool where it seems to be appropriate.

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The last two features are opening an interesting possibility of using psana for real-time monitoring of data while benefiting from reusing
the same code which might be developed for the traditional OFFLINE processing/analysis.

2. Things to know before to run the examples

The location of examples

We put all examples for today's session at the following diretory:

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psana
[error:2013-06-06 20:54:44.131:PSAnaApp.cpp:218] no analysis modules specified

3. Basic examples

This section presents a few simple scripts which have been developed to underline the main ideas behind the framework's API. The code of the examples along with a simple HOWTO file can be found at:

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/reg/g/psdm/tutorials/cxi/cspad_imaging/

5. Doing something less trivial

Custom HDF5 translator written by a user

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