Requirements

The enviroment must be set up according to the guide

Reconstruction: building the code

The source code for the trace reconstruction application is available in baltig

These are the steps required for building and install the application locally: 

mkdir $HOME/Software
cd $HOME/Software
git clone https://baltig.infn.it/muontomography/trace-reco.git PattRec
cd PattRec && mkdir build && cd build
cmake3 -DCMAKE_INSTALL_PREFIX=$HOME/Software/PattRec -DCMAKE_BUILD_TYPE=RelWithDebInfo -Wno-dev ..
make
make install
cd $HOME/Software/PattRec
ln -s bin/runPR .

Reconstruction: running the application

Assumed that the dataset files:

  • are stored in the directory $HOME/Data
  • have an extension .i<serial number>

The track reconstruction can be run with the following command: 

./runPR --conf=$HOME/Software/PattRec/chamber0.ini --dataset=$HOME/Data/<dataset name without extension> --maxevn=1000000

The executable produces a set of data files in the OUTPUT  directory, the dataset name (without the extension) is used as a prefix for the output files. The option conf specifies the full name of a configuration file; an example of configuration file, with documented items, is the file mutomca_pr.ini, located in the working directory: 

# directory for output files
outdir = ./OUTPUT
# minimum number of hits per super-layer for pattern reconstruction
min_nhit_theta = 4
# maximum number of hits per super-layer for pattern reconstruction
max_nhit_theta = 8
# number of event to be processed (default 100000000) if not specified in the command line
maxevn = 100000000

# dataset path (withou extension .i*) if not specified in the command line
#dataset=/mnt/muotom-data/data/castor/altea/rawdata/3_V_100_TrgAndPhi_5hits-4layers_mask_2404_3316_43

# tubes to be excluded from the pattern reconstruction (space-separated list of <layerid>,<tubeid>)
#bad_tubes = 0,12 1,32 2,9

# mean timer threshold for condition mta-mtb (default 15.0)
mtimer_threshold_first = 15.0
# mean timer threshold for other conditions (default 20.0)
mtimer_threshold_second = 20.0

# max time of a time box in ns
time_box_size = 400

The command line options dataset and maxevn are not mandatory, they can be defined in the configuration file. If they are specified both in command line and in the configuration file, the command line values get priority.

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