Try to procude your first data set

[noemina]

As soon as you have installed the ACTS project, you can produce your first data set:

• [x] Try to run this commands (https://github.com/asalzburger/tra-tra/blob/main/data/pdg13-n25-0.5to10GeV-0.5eta/production.cmd):

  ./ActsExampleParticleGun -n100 --gen-nparticles 25 --gen-mom-gev 0.25:10. --gen-mom-transverse true --gen-eta -0.5:0.5 --output-csv
  ./ActsExampleFatrasDD4hep --dd4hep-input=../../acts/thirdparty/OpenDataDetector/xml/OpenDataDetector.xml --output-csv  --bf-constant-tesla 0:0:2 --input-dir="./"

They are used to:

• generate the particle sample
• simulate how they interact with the detector

With the command written above you are producing 100 events (-n100) with 25 particles each (--gen-nparticles 25) [by default you simulate single muons with pdgId=13] uniformly distributed in eta between (-0.5, 0.5) (--gen-eta -0.5:0.5). You set the transverse momentum (--gen-mom-transverse true) to be uniformly distributed between 250 MeV and 10 GeV (--gen-mom-gev 0.25:10.). The output files will be in cvs format (--output-csv).

For the detector simulation we use the OpenDataDetector (ODD) (--dd4hep-input=../../acts/thirdparty/OpenDataDetector/xml/OpenDataDetector.xml) assuming an homogeneous axial magnetic field of 2T (--bf-constant-tesla 0:0:2). The directory of the input files is also specified (--input-dir="./") as well as the format of the output files (--output-csv).

• [x] When you feel comfortable, try to produce one dataset with very high pT, e.g. 50-100 GeV. This will be used to cross-check if the approximation of the Hough transform space in the transverse plane holds (as it has to for high pT tracks).

[asalzburger]

Action item @asalzburger:

• [x] update the digitization config file

This is now available in the ODD repository (I will open an PR for acts/main but for the moment we can use it as such):

https://github.com/acts-project/OpenDataDetector/tree/main/config

we can grab it from there.

[AndrewSpano]

Produced the dataset. The p_T values I am getting are legit:

Still, the results are the same.:

This definitely means I have a bug somewhere. Should be something really trivial, I will give my best to find it asap.

[noemina]

Let me define some steps to help you finding the problem:

• [ ] Run on one event with 25 track and look at the (phi_0 - phi_1) for the precise and approximated transform.
• [ ] Check how the lines and curves look like in the (phi_0, q/pT) Hough space.
• [ ] Make the same plot as above as a heat map.
• [ ] Evaluate which tracks are not reconstructed using the approximated transformation and try to understand why.

[noemina]

Action item @asalzburger:

* [x]  update the digitization config file

This is now available in the ODD repository (I will open an PR for acts/main but for the moment we can use it as such):

https://github.com/acts-project/OpenDataDetector/tree/main/config

we can grab it from there.

Hello @asalzburger,

We are running the ActsExampleFatrasDD4hep. If I understood correctly this runs the simulation, where do we have to include the digitization config?

thanks!