ATLAS Support Center

User Tools

Site Tools

Trace: • fei4b_single
fcs:fpad

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
fcs:fpad [2016/03/18 16:08]
asc [Visualizing events with Jas+Wired] 		fcs:fpad [2016/03/22 04:17] (current)
asc [FPaDsoft]
Line 7: Line 7:
  
 The package does not require  installation, nor platform-dependent libraries. The package does not require  installation, nor platform-dependent libraries.
-It is a merge of several open-source Java projects, such as [[http://www.lcsim.org|lcsim.org]] [(Simulator for the linear collider (SLIC): A tool for ILC detector simulations. N. Graf and  J. McCormick, http://inspirehep.net/record/736286?ln=en)], [[http://lcio.desy.de/ |LCIO event model]], [[http://java.freehep.org/|FreeHep]], [[http://jwork.org/dmelt|DMelt]] (community edition) for histogramming and plotting,  [[http://atlaswww.hep.anl.gov/hepsim|hs-tools of HepSim]]. It also supports Java-implemented anti-KT jets. The package is designed to work using the Python language (it includes Jython 2.7), or using the standard Java. All HEP Jas plugins are included (and some of them were modified to work with DMelt).+It is a merge of several open-source Java projects, such as [[http://www.lcsim.org|lcsim.org]] [(Simulator for the linear collider (SLIC): A tool for ILC detector simulations. N. Graf and  J. McCormick, http://inspirehep.net/record/736286?ln=en)], [[http://lcio.desy.de/ |LCIO event model]], [[http://java.freehep.org/|FreeHep]], [[http://jwork.org/dmelt|DMelt]] (community edition) for histogramming and plotting,  [[http://atlaswww.hep.anl.gov/hepsim|hs-tools of HepSim]]. It also supports Java-implemented anti-KT jets. The package is designed to work using the Python language (it includes Jython 2.5.4), or using the standard Java. All HEP Jas plugins are included (and some of them were modified to work with DMelt).
  
- +This program is a part of [[http://atlaswww.hep.anl.gov/asc/jas4pp/|Jas4pp program]].
-You can find Monte Carlo samples in the LCIO format using the [[http://atlaswww.hep.anl.gov/hepsim/list.php?find=gev250%rfull001|rfull001 search link]]. +
- This link prints all event samples after full detector simulations ("tag rfull001"). +
-Select "info" and then find the tag "rfull001" which  prints LCIO files for a given MC sample. +
-You can download such samples as discussed in [[http://atlaswww.hep.anl.gov/hepsim/description.php|HepSim]] manual. +
- +
- +
- +
-The installation does not have external dependencies besides Java. Make sure Java7 and above is installed. +
-Then run these commands to install the package (on Linux) +
-<code bash> +
-wget http://atlaswww.hep.anl.gov/hepsim/soft/fpadsoft-1.2.tgz -O - | tar -xz; +
-cd fpadsoft/ +
-source setup.sh # takes 5 sec for first-time optimization +
-</code> +
-The last command optimizes Java packages for the Python language. +
-Now you are ready to run over  any file with truth-level and datector-simulation files, such as LCIO and ProMC. +
-You can also use Windows. +
- +
-====== Examples ====== +
-All examples are publicly available from [[http://atlaswww.hep.anl.gov/asc/hepsim/soft/examples/|examples public directory]]. +
-They are also located in the "examples" directory of the downloaded  package. +
-Many examples are based on  [[http://atlaswww.hep.anl.gov/hepsim/info.php?item=146|gev250ee_pythia6_zpole_ee]] data sample (Z->e+e-). +
-We assume that the  working directory is "examples". Do not forget to run "setup.sh" before running the examples. +
- +
- +
-===== Z-peak using MC truth ===== +
-Let's calculate Z peak from thuth-level electrons. +
-Get 4 files (in 2 threads) and copy all files to the directory "gev250ee_pythia6_zpole": +
- +
-<code bash> +
-source setup.sh +
-cd examples +
-hs-get gev250ee_pythia6_zpole_ee%rfull001 gev250ee_pythia6_zpole_ee 2 4 # download 4 files +
-../fpad mc_truth.py +
-</code> +
- +
- +
-Alternatively, run this example in the **FPad editor**: +
- +
-<code bash> +
-../fpad_edit mc_truth.py +
-</code> +
-It will pop-up an editor to edit the script. Then press "Run". You can use also Windows and run "fpad.bat". +
-The result of this file is: +
- +
-{{:fcs:mc_truth.png?400|}} +
- +
-===== Z-peak using PFA ===== +
-Let's calculate Z peak from particle-flow objects after full reconstruction using Pandora. +
-You do not run "hs-get" command if you have done this before. +
- +
-<code bash> +
-hs-get gev250ee_pythia6_zpole_ee%rfull001 gev250ee_pythia6_zpole_ee 2 4 # download 4 files +
-../fpad mc_pflow.py +
-</code> +
- +
- +
-{{:fcs:mc_pflow.png?400|Z-peak from PFA}} +
- +
-you can also make a simple fit: +
- +
-<code bash> +
-../fpad mc_pflow_fit.py +
-</code> +
- +
-{{:fcs:mc_pflow_fit.png?400|}} +
- +
-===== Z-peak using tracks ===== +
- +
-Let's calculate Z peak from reconstructed tracks (no Pandora and no particle identification) +
-You do not run "hs-get" command if you have done this before. +
- +
-<code bash> +
-hs-get gev250ee_pythia6_zpole_ee%rfull001 gev250ee_pythia6_zpole_ee 2 4 # download 4 files +
-../fpad mc_tracks.py +
-</code> +
- +
- +
-{{:fcs:mc_tracks.png?400|Z-peak from tracks}} +
- +
-===== Higgs from γ γ===== +
- +
-Let's calculate the Higgs peak from reconstructed photons after the PFA algorithm. This time +
-you will need H-> gamma+gamma sample [[http://atlaswww.hep.anl.gov/hepsim/info.php?item=152|gev250ee_pythia6_higgs_gamgam]]: +
-We set pT(γ)>10 GeV. +
- +
-<code bash> +
-hs-get gev250ee_pythia6_higgs_gamgam%rfull001 gev250ee_pythia6_higgs_gamgam 2 10 # get 10 files in 2 threads +
-../fpad mc_gammagamma.py +
-</code> +
- +
-{{:fcs:mc_gammagamma.png?400|Higgs from gamma+gamma}} +
- +
-===== Z-peak using b-jets ===== +
-Let's calculate Z peak from reconstructed b-jets. Jets are reconstructed using the Durham kT algorithm with ycut=0.05. +
-This time we will download Z-> bbar sample. Look at [[http://atlaswww.hep.anl.gov/hepsim/info.php?item=149|gev250ee_pythia6_zpole_bbar]]. We assume pT(jet)>20 GeV.  +
- +
-<code bash> +
-hs-get gev250ee_pythia6_zpole_bbar%rfull001 gev250ee_pythia6_zpole_bbar  2 4 # download 4 files +
-../fpad mc_jets.py +
-</code> +
- +
-{{:fcs:mc_jets.png?400|Z-peak from 2 jets}} +
- +
-No any optimization for jet reconstruction was used. Consider other approaches to make more realistic dijet  mass. +
- +
- +
-===== Z-peak using tau-tau ===== +
-Let's calculate Z peak from two Durham jets as in the previous example, but using Z->tau+tau sample. +
-Should see shift from 90 GeV (neutrino). +
- +
-<code bash> +
-hs-get gev250ee_pythia6_zpole_tautau%rfull001 gev250ee_pythia6_zpole_tautau 2 50 # download 50 files +
-../fpad mc_tautau.py +
-</code> +
- +
- +
-{{:fcs:mc_tautau.png?400|Z-peak from tau tau}} +
- +
-No any optimization for jet reconstruction was used. Consider other approaches to make more realistic tau reconstruction.. +
- +
-===== Higgs from 4 leptons===== +
-Let's calculate Higgs peak from reconstructed leptons in the channel H(125)-> ZZ* -> 4L (electrons and muons). +
-We will use particle flow objects to reconstruct and identify electrons and muons. +
-This time we will download Higgs-> 4 lepton  sample. Look at [[http://atlaswww.hep.anl.gov/hepsim/info.php?item=150|gev250ee_pythia6_higgs_zz_4l]]. +
- +
-<code bash> +
-hs-get gev250ee_pythia6_higgs_zz_4l%rfull001 gev250ee_pythia6_higgs_zz_4l 2 100 # download 100 files in 2 threads +
-../fpad mc_higgs_zz.py +
-</code> +
- +
-{{:fcs:mc_higgs_zz.png?400|Higgs from 4L}} +
- +
-You can also look at some exotic configurations. For example, let's reconstruct Higgs at 100 TeV using SLIC: +
- +
-<code bash> +
-hs-get tev100_pythia6_higgs_zz_4l%rfull001 tev100_pythia6_higgs_zz_4l # get 100 TeV sample +
-../fpad mc_higgs_zz_100tev.py +
-</code> +
- +
-{{:fcs:mc_higgs_100tev.png.png?400|4-leptons at 100 TeV}} +
- +
- +
-===== Higgs from bbar===== +
- +
-This example uses the Jade algorithm to force 2 jets, and uses H-> bbar sample: +
- +
-<code bash> +
-hs-get gev250ee_pythia6_higgs_bbar%rfull001 gev250ee_pythia6_higgs_bbar  2  15  +
-../fpad mc_higgs_bbar.py +
-</code> +
- +
-{{:fcs:mc_higgs_bbar.png?400|}} +
- +
- +
- +
-===== Jet energy resolutions===== +
- +
-This example shows the jet energy resolution in 2 pT(truth) regions. It is based on inclusive jet sample +
-[[http://atlaswww.hep.anl.gov/hepsim/info.php?item=134|gev250ee_pythia6_qcd_all]]. We use Durham jets with pT(truth)>20 GeV. +
-Jet are constructed from PFA objects. Truth jet and reco jets are matched using dR<0.05 in phi and rapidity. +
- +
-{{:fcs:mc_jets_resol.png|Jet resolution}} +
-===== Showing calorimeter hits in 3D===== +
- +
-One can also visualize calorimter-level objects, such as hits. +
-For example, here are calorimeter hits for Z-> bbar event +
-(only one event is shown) +
- +
-<code bash> +
-../fpad mc_hits3D.py # hits in 3D for 1 events +
-../fpad mc_hits.py   # phi distribution of hits +
-</code> +
- +
-Location of calorimeter hits for 1 event: +
- +
- +
-{{:fcs:mc_hits3d.png?400|}} +
- +
-Phi angle of calorimeter hits  for all events: +
- +
-{{:fcs:mc_hits.png?400|}} +
-====== How to download all files ====== +
- +
-Use the [[http://atlaswww.hep.anl.gov/hepsim/description.php| HepSim manual]]. You do not need to "hs-tools" since it is already installed. +
-You can list and download files for Z to e+e- automatically as +
- +
-<code bash> +
-hs-ls  gev250ee_pythia6_zpole_ee%rfull001 # list all files +
-hs-get gev250ee_pythia6_zpole_ee%rfull001 # download all files (can be large sample!) +
-</code> +
-Here "gev250ee_pythia6_zpole_ee" is the dataset name, and "rfull001" is the reconstruction tag. +
-====== How to find MC after full simulation ====== +
- +
- +
-To find event samples with full simulations, use the full search and the string "rfull". +
-For example, use  the [[http://atlaswww.hep.anl.gov/hepsim/list.php?find=rfull]]  link that lists all samples that have been processed +
-with a full detector simulation. +
- +
- +
-====== LCIO event structure ====== +
- +
- +
-The standard set of containers is available from the LCIO files posted on HepSim. Read +
-[[http://lcio.desy.de/v02-04-03/doc/manual_html/manual.html|Manual]]. The API is described in  +
-[[http://lcio.desy.de/v02-04-03/doc/api/| LCIO Java API description]]. +
- +
-Look the Java API definition of the needed objects in [[http://www.lcsim.org/sites/lcsim/apidocs/org/lcsim/lcio/package-summary.html|org.lcsim.lcio]] +
- +
-<code> +
-BeamCalHits +
-CalorimeterHitRelations +
-EM_BARREL +
-EM_ENDCAP +
-EcalBarrelHits +
-EcalEndcapHits +
-HAD_BARREL +
-HAD_ENDCAP +
-HcalBarrelHits +
-HcalEndcapHits +
-HelicalTrackHitRelations +
-HelicalTrackHits +
-HelicalTrackMCRelations +
-LumiCalHits +
-MCParticle +
-MUON_BARREL +
-MUON_ENDCAP +
-MuonBarrelHits +
-MuonEndcapHits +
-PandoraPFOCollection +
-ReconClusters +
-SiTrackerBarrelHits +
-SiTrackerEndcapHits +
-SiTrackerForwardHits +
-SiVertexBarrelHits +
-SiVertexEndcapHits +
-StateAtECal +
-StateAtEnd +
-StateAtStart +
-TKR_RawTrackerHits +
-TKR_TrackerHits +
-Tracks +
-VXD_RawTrackerHits +
-VXD_TrackerHits +
-</code> +
- +
-====== Detector geometry ====== +
-The Monte Carlo files located in [[http://atlaswww.hep.anl.gov/hepsim/list.php?find=gev250%rfull001|rfull001 link]] are done +
-using the sidloi3 detector: [[http://lcsim.org/detectors/sidloi3.html]]. The XML geometry is given in +
-[[http://lcsim.org/detectors/sidloi3.zip]]. +
- +
-The SiD detector is shown here {{:fcs:sidimage.png?400|}} +
- +
-You can view detector geometries posted in [[http://lcsim.org/detectors/]] as this. +
-Download zip file and extract it. Find file "compact.xml", and then run geometry converter as: +
- +
-<code> +
-./gconverter -o heprep compact.xml  sidloi3.heprep +
-</code> +
- +
-Now you can open this file in the Jas and view it. Look at other options by running "./gconverter_gui". +
- +
-Here are a few links to the description of this detector. +
- +
- +
-{{:fcs:sidloi.pdf| SiD detector description}} +
- +
-{{:fcs:siddod.pdf| SiD detector description (older version)}} +
- +
- +
- +
- +
- +
- +
- +
-====== Java API for scripts ====== +
- +
-===== Plots and histograms ===== +
- +
- +
-FPadSoft uses histogram packages supported by both DMelt (community edition) or JAIDA (FreeHep). +
-DMelt provides programming API similar to PyROOT and with classes named conveniently to reduce code verbosity.  +
- +
-Here are a few most common classes: +
- +
-  * [[http://jwork.org/dmelt/api/doc.php/jhplot/HPlot|HPlot]] - canvas to show X-Y data and histograms in 2D +
-  * [[http://jwork.org/dmelt/api/doc.php/jhplot/HPlot|HPlot3D]] - canvas to show X-Y-Z data and histograms in 3D +
-  * [[http://jwork.org/dmelt/api/doc.php/jhplot/H1D|H1D]] - 1D histogram +
-  * [[http://jwork.org/dmelt/api/doc.php/jhplot/H1D|H2D]] - 2D histogram +
-  * [[http://jwork.org/dmelt/api/doc.php/jhplot/P1D|P1D]] - X-Y container with support of 2-level errors +
- +
-The main canvas to show histograms [[http://jwork.org/dmelt/api/doc.php/jhplot/H1D|H1D]] and data points  [[http://jwork.org/dmelt/api/doc.php/jhplot/P1D|P1D]]  is [[http://jwork.org/dmelt/api/doc.php/jhplot/HPlot|HPlot]]. To process scripts in a background without a pop-up [[http://jwork.org/dmelt/api/doc.php/jhplot/HPlot|HPlot]], use method "visible(False)", and set sys.exit(0) at the end of the scripts.  You can also use the JAIDA to make histograms (Histogram1D or Histogram2D).  +
-In addition, data are saved in the form of XML (with the extension ".jdat") files. Look the manual [[http://jwork.org/dmelt/wikidoc/doku.php?id=man:io:crossplatform|DatMelt IO]]. +
- +
-===== Lorentz particles and Jets ===== +
- +
-  * [[http://jwork.org/dmelt/api/doc.php/hephysics/hepsim/PromcUtil|PromcUtil]] convenient method to fill arrays with particles from ProMC files +
-  * [[http://jwork.org/dmelt/api/doc.php/hephysics/particle/LParticle|LParticle]] a HEP particle with the Lorentz transformations +
-  * [[http://jwork.org/dmelt/api/doc.php/hephysics/jet/FastParticle|FastParticle]] a HEP particles with precomputed Et2,Eta,Phi for jet algorithms.  +
-  * [[http://java.freehep.org/freehep-physics/apidocs/hep/physics/vec/package-summary.html|Physics vectors]] typical HEP physics vectors the Lorentz transformations +
-  * [[http://jwork.org/dmlt/api/doc.php/hephysics/jet/JetN2|JetN2]] recommended kt-type jet clustering ng algorithms (kT, anti-kT, CA) implemented in Java using N^2 approach, similar to the FastJet algorithm. Recommended for hadron collisions +
-  * [[http://jwork.org/dmelt/api/doc.php/hephysics/jet/SCJet|SCJet]] traditional kt-type jet clustering algorithms (kT, anti-kT) for pp implemented in Java using N^3 approach (slow)  +
-  * [[http://java.freehep.org/freehep-physics/apidocs/hep/physics/jet/package-summary.html|Jets and event shapes]] traditional jet algorithms and event shapes for e+e- from FreeHep (Geneva, Jade, Durham jets)  +
-   +
-   +
-Java implementation of the longitudinally invariant kT and anti-kT clustering algorithms uses the E-scheme to combine particles (p1+p2) and Eta-Phi space (not Rapidity-Phi). Also, Cambridge/Aachen jets are supported.   [[https://github.com/chekanov/hepjet/|HepJet on github]] shows  benchmarks of the Java implementation of the anti-KT with the original FastJet package. +
- +
- +
-You can build the standard kt-jets using [[http://jwork.org/dmelt/api/doc.php/hephysics/hepsim/PromcUtil | PromcUtil]], followed by the  +
-[[http://jwork.org/dmelt/api/doc.php/hephysics/jet/KTjet | KTjet]] class.  +
- +
-===== Working with ProMC files ===== +
- +
-To work with ProMC files, look at the ProMC Java API that is used to store data on the HepSim web page +
- +
-  * [[http://atlaswww.hep.anl.gov/asc/promc/doc/api/promc/io/ProMCHeaderFile.ProMCHeader.html | ProMCHeader]] for MC and [[http://atlaswww.hep.anl.gov/asc/promc/doc/api/pronlo/io/ProMCHeaderFile.ProMCHeader.html | ProMCHeader]] for NLO +
-  * [[http://atlaswww.hep.anl.gov/asc/promc/doc/api/promc/io/ProMC.ProMCEvent.Event.html  | Event ]] for MC and [[http://atlaswww.hep.anl.gov/asc/promc/doc/api/pronlo/io/ProMC.ProMCEvent.Event.html  | Event ]] for NLO +
-   * [[http://atlaswww.hep.anl.gov/asc/promc/doc/api/promc/io/ProMC.ProMCEvent.Particles.html | Particles]] for MC and  [[http://atlaswww.hep.anl.gov/asc/promc/doc/api/pronlo/io/ProMC.ProMCEvent.Particles.html | Particles]] for NLO +
-  * [[http://atlaswww.hep.anl.gov/asc/promc/doc/api/promc/io/ProMCStatFile.ProMCStat.html | ProMCStat]] for MC and [[http://atlaswww.hep.anl.gov/asc/promc/doc/api/pronlo/io/ProMCStatFile.ProMCStat.html | ProMCStat]] for NLO +
- +
- +
-It is simplified compared to full MC simulations, and also includes additional arrays "idata" and "fdata" to store +
-information on event weights and uncertainties. +
- +
-The project uses the community edition of [[http://jwork.org/dmelt/|DMelt]] project and  the FreeHEP Java Libraries. +
- +
- +
- +
- +
-====== Using C++/ROOT with LCIO files====== +
- +
-If you need to read LCIO files in C++ code with ROOT/FastJet, use this example package: +
- +
-<code bash> +
-wget http://atlaswww.hep.anl.gov/hepsim/soft/lcio-cpp.tgz -O - | tar -xz; +
-cd lcio-cpp; make  +
-</code> +
-It will compile "example.cpp" file linking FastJet package. Look at README file to see how to install the "LCIO" package required by this example.  Your LCIO" files from HepSim should be in the directory "data". +
- +
- +
- +
-====== Analysing truth-level files ====== +
- +
-You can run over the original truth-level files from HepSim: +
- +
-<code bash> +
- wget http://mc.hep.anl.gov/asc/hepsim/events/ee/250gev/pythia6_zpole_tautau/macros/pythia6_zpole_tautau.py +
-../fpad pythia6_zpole_tautau.py +
-</code> +
-This example prints the pT distribution of e, mu, taus. +
-Typically, HepSim contains validation files with the extension py that can check the validity of truth-level samples. +
-See the description in [[http://atlaswww.hep.anl.gov/hepsim/description.php|HepSim documentation]] and [[https://atlaswww.hep.anl.gov/asc/wikidoc/doku.php?id=community:refhepsim_analysis|HepSim API]] +
- +
-   +
-     +
-====== Visualizing events with Jas+Wired ====== +
- +
-You can run Jas+Wired to visualize the simulated events.  The Wired program is included in FPadSoft, so you simply run it as: +
-<code bash> +
-./fjas +
-</code> +
- +
-Then copy the detector geometry file to the local directory where the file "jas" is: +
-<code bash> +
-wget http://atlaswww.hep.anl.gov/hepsim/soft/detectors/sidloi3_heprep.tgz -O - | tar -xz; +
-</code> +
-This will create a directory "detector". This detector corresponds to "rfull001" tag used for the reconstruction of pythia6_zpole_ee (Z->e+e-).  +
- +
-Now we can visualize the detector as **[File]-[Open data source]-[HepRep]** XML and select the file "detector/sidloi3/sidloi3.heprep". +
-This is how to do this using the command line: +
- +
-<code bash> +
-./fjas detector/sidloi3/sidloi3.heprep +
-</code> +
-You will see the detector layout: +
- +
-{{:fcs:detector.png?400|Jas3}} +
- +
-Now, we will read the event: Open any *.slcio file you copied from HepSim as  +
-**[File]-[Open data source]-[LCIO]** file.  Then click a small button [Go] (top menu bar). It will process +
- events.  Then select again **[File]-[New]-[Wired 4 view]**.  You will get an image in the Wired4 display as this: +
- +
-{{:fcs:event.png?400|}} +
- +
-Now press [Go] again to look at next event. +
- +
- If you want to see how data records are organized inside the slcio file, +
-do this **[File]-[New]-[LCSim Event browser]** +
- +
-====== People ====== +
- +
-This collection of tools for future collider studies  was developed at ANL (S.Chekanov, [email protected])  +
-in collaboration with Jan Strube (PNNL) ([email protected]) and Ashutosh Kotwal (Duke U) [email protected]. +
-The Java part of the simulator for the linear collider was designed N. Graf, J. McCormick, T.Jonson  +
- +
- +
-====== FAQ ====== +
- +
-For some help with SLIC, read: +
- +
-https://confluence.slac.stanford.edu/display/ilc/ILC+Detector+Simulation+FAQ +
- +
-https://confluence.slac.stanford.edu/display/ilc/LCSim+Tutorials+
  
  
fcs/fpad.1458317322.txt.gz · Last modified: 2016/03/18 16:08 by asc

Page Tools

Except where otherwise noted, content on this wiki is licensed under the following license: Public Domain
Public Domain Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki