Athena Tutorial with Atlfast example CMT version

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Athena Tutorialwith Atlfast example(CMT version)

• Massimo Marino - David Rousseau

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Atlfast

• ATLFAST is the package for  fast simulation of
  ATLAS detector and physics analysis. It includes
  most crucial detector aspects
• Jet reconstruction in the calorimeter,
  momentum/energy smearing for leptons and photons,
  magnetic fields effects and missing transverse
  energy.
• Provides, starting from the list of particles in
  the event, the list of reconstructed jets,
  isolated leptons, photons and muons and expected
  missing transverse energy.
• Provides also list of reconstructed charged
  tracks.

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Outline

• 1. Introduction
• 2. Configuration and Build system
• 3. Printing and Job Options
• 4. Accessing Event Data
• 5. Histograms
• 6. Ntuples

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Aims for the Tutorial

• At the end of the day you should
• Be more familiar with terms and concepts in
  Athena
• Be able to understand code development of
  Algorithms
• Be able to write simple analysis programs
• We will do that using an Atlfast example of
  analysis

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Structure

• Presentations of concepts
• Exercises using Atlfast
• Start with an (almost) empty Algorithm
• Work towards a fully featured Atlfast example
  application
• New concepts and components introduced at each
  step along the way
• Documents and pre-examples for self-training
• Code/Commands you have to type looks like
• What you will have to type copying from slides

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Logistics

• We use accounts on atlas.cern.ch (lxplus cluster)
• User atltrltxgt where ltxgt is 0- 9 and a-e
• Password see sticker
• Machine atlas.cern.ch
• Two seats per station
• Working directory in students AFS accounts

Permanent accounts Nothing special if you have
space you may re-do the tutorial later on your
account
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Get yourself ready

• Local station (PC) login
• ltuser-namegt trainlta-zgt
• ltpasswordgt trainlta-zgt01
• create a terminal window and issue xhost

• atlas.cern.ch login
• as per sticker on your monitor
• ssh atlas.cern.ch -l ltaccount-as-per-stickergt
• password as per sticker
• setenv DISPLAY accordingly

• Get two terminal windows and emacs (or preferred
  editor, e.g. nedit)
• xterm
• xterm
• emacs

• In one of terminal windows, create our working
  directory
• mkdir maxidisk/Athena
• Everything will be done into this directory and
  below