Gabriele Cosmo
96 lines
3.2 KiB
Plaintext
96 lines
3.2 KiB
Plaintext
//$Id$
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///\file "analysis/AnaEx03/.README"
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///\brief Example AnaEx03 README page
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/*! \page ExampleAnaEx03 Example AnaEx03
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This example shows the usage of histogram and tuple manipulations using
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an AIDA compliant system. All analysis manipulations
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(attaching an AIDA implementation, histo booking, filling, saving
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histos in a file, etc...) are located in one class : HistoManager.
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The example is an adaptation of examples/novice/N03. It describes a simple
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sampling calorimeter setup.
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\section AnaEx03_s1 Detector description
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The calorimeter is a box made of a given number of layers. A layer
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consists of an absorber plate and of a detection gap. The layer is
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replicated.
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Six parameters define the calorimeter :
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- the material of the absorber,
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- the thickness of an absorber plate,
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- the material of the detection gap,
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- the thickness of a gap,
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- the number of layers,
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- the transverse size of the calorimeter (the input face is a square).
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The default geometry is constructed in DetectorConstruction class,
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but all of the above parameters can be modified interactively via
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the commands defined in the DetectorMessenger class.
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<pre>
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|<----layer 0---------->|<----layer 1---------->|<----layer 2---------->|
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==========================================================================
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|| absorber | gap || absorber | gap || absorber | gap ||
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beam || | || | || | ||
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======> || | || | || | ||
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==========================================================================
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</pre>
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\section AnaEx03_s2 An event : PrimaryGeneratorAction
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The primary kinematic consists of a single particle which hits the
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calorimeter perpendicular to the input face. The type of the particle
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and its energy are set in the PrimaryGeneratorAction class, and can
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be changed via the G4 build-in commands of ParticleGun class.
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\section AnaEx03_s3 Histograms
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To produce histograms, at least one of the AIDA implementations should be
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available. See the file InstallAida.txt
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AnaEx03 can produce 4 histograms :
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- histo 1 : total energy deposit in absorber per event
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- histo 2 : total energy deposit in gap per event
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- histo 3 : total track length of charged particles in absorber per event
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- histo 4 : total track length of charged particles in gap per event
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And 1 Ntuple :
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- one row per event : EnergyAbs EnergyGap TrackLAbs TrackLGap
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These histos are booked in HistoManager and filled from EventAction.
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One can control the name of the histograms file and its format:
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- default name : AnaEx03
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Possible formats : hbook root (default) xml
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See HistoManager constructor
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Note that, by default, histograms are disabled. To activate them, uncomment
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the flag G4ANALYSIS_USE in GNUmakefile, *before* compilation.
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\section AnaEx03_s4 AIDA and OpenScientist
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See the pages \link ExampleA01AIDA README.AIDA \endlink and
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\link ExampleA01OpenScientist README.OpenScientist \endlink in \ref ExampleA01
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for more indications how to use this system to visualize and handle
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histogram files.
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*/
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