Running Millepede‐II on a CAF File - EMPHATICSoft/emphaticsoft GitHub Wiki

The following process assumes that Millepede-II has already been installed in a separate directory. For instructions on installing Millepede, as well as a short tutorial, view the following Wiki pages:

https://github.com/EMPHATICSoft/emphaticsoft/wiki/MILLEPEDE%E2%80%90II

https://github.com/EMPHATICSoft/emphaticsoft/wiki/Millepede%E2%80%90II-Installation

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Step 1

The following files should be copied into a new directory: /exp/emph/app/users/tbarbera/art_simulations/artsim_attempt1/extract_caf_data /exp/emph/app/users/tbarbera/art_simulations/artsim_attempt1/organize_caf_data /exp/emph/app/users/tbarbera/MPII/GBL/gblemph/GBL_3D /exp/emph/app/users/tbarbera/MPII/GBL/gblemph/mille.py /exp/emph/app/users/tbarbera/MPII/GBL/gblemph/gblnum.py /exp/emph/app/users/tbarbera/MPII/GBL/gblemph/gblfit_helix.py These files are also located in the GitHub Repository for GBL files.

The CAF file should also be copied into this directory. For information on creating a CAF file, view the wiki page on Creating a CAF file.

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Step 2

Change the input file in extract_caf_data to the desired CAF file and run:

python3 extract_caf_data

This will produce a file named output.txt

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Step 3

Update the output file in organize_caf_data with the desired name and run:

python3 organize_caf_data

This will produce a text file containing the 3D tracks that can be run through GBL.

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Step 4

Update the input file in GBL_3Dto match the name of the output file from Step 3.

Update the name of the binary file produced in the 'GBL_3D' script

Run:

python3 GBL_3D

This will produce a binary file to be fed into Pede inside of the 'target' directory.

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Step 5

Copy the binary file produced in Step 4 into the 'target' directory in Millepede. Make sure that the name of the binary file in the 'target' directory ends in ".dat"

Create a Millepede-II Steering file with the desired constraints (an example can be copied from '/exp/emph/app/users/tbarbera/MPII/target/general_emphatic_steering.txt')

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Step 6

To run Pede on the binary file:

./pede steering_file_name > pede.dump

This will add information about the Alignment Parameters into 'millepede.res' and information about the residuals into 'millepede.mon'

In addition, to check the information in the binary file:

./pede -C steering_file_name > pede.dump

This will not calculate the alignment parameters, but will still add information about the residuals into 'millepede.mon' and adds basic information to 'millepede.res'

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Additional Information

Parameter labels are set in GBL as three-digit numbers. The first two numbers correspond to the strip number (starting with 00 up to 27). The last digit corresponds to the type of parameter:

Ending in 1 - Displacement in measurement direction

Ending in 3 - Displacement in Z

Ending in 4 - Rotation about measurement direction axis

Ending in 5 - Rotation about axis perpendicular to measurement direction (still in XY plane)

Ending in 6 - Rotation about Z-axis