Draft: Prototype for VELO material mapping trigger line
A trigger line running on VELO displaced reconstructed tracks was required by the VELO team to perform a mapping of the detector material. This draft MR contains a prototype open for discussion, according to some discussions made on mattermost.
The selection is currently implemented requiring a VELO with a POCA radial coordinate wrt the z axis larger than a threshold (the default cut value is open for suggestions by VELO expert). I also added a sequence to only run the VELO reconstruction (with SP decoding) and the trigger line. With the current configuration, this is being tested on VELO local data (/hlt2/objects/VELO/0000242012/Run_0000242012_20220809-145821-888_VAEB02.mdf) and gives
rate_validator validation:
Hlt1VELODisplacedTrack: 67/ 1000, ( 2010.00 +/- 237.19) kHz
Inclusive: 67/ 1000, ( 2010.00 +/- 237.19) kHz