ECCE Calorimetry Working Group Meeting

Name: ECCE Calorimetry Working Group Meeting
Start: 2021-09-21T08:00:00-04:00
End: 2021-09-21T10:00:00-04:00
Location: No location set

Tuesday 21 Sept 2021, 08:00 → 10:00 US/Eastern

Friederike Bock (ORNL), Yongsun Kim (UIUC)

Description

https://cern.zoom.us/j/66394388275?pwd=VFJ6dUg2UFlLTmV2MjgyWXg1bTczQT09

pwd: CaloECCE

- 1
  Simulation implimentation
  - a) Integration completed
    
    Thanks to the calorimeter team for the rapid response in resolving integration overlaps last week.
    
    Speaker: Dr Jin Huang (Brookhaven National Lab)
    
    July-Concept36.png
    
    July-Concept38.png
    
    July-Concept43.png
  - b) FEMCal Issue
    
    Speaker: Jin Huang (Brookhaven National Lab)
    
    It frequently aborts DIS event when particle hit particular parts of FEMC. FEMC configuration: https://github.com/ECCE-EIC/macros/blob/master/common/G4_FEMC_EIC.C#L59
    
    This problem appears can be reproduced by this simple change in the macro, i.e. launching particle from the problematic location in FEMC. It would be interesting to know what G4 tracking is thinking with display and /tracking/verbose 3: https://github.com/ECCE-EIC/macros/commit/d53273dab5efa57861233cd16d03cf5f723194b3 and here is what I get:
    
    -------- WWWW ------- G4Exception-START -------- WWWW ------- *** G4Exception : GeomNav1002 issued by : G4Navigator::ComputeStep() Stuck Track: potential geometry or navigation problem. Track stuck, not moving for 10 steps. Current phys volume: 'hEcalTower' - at position : (-200.2220723491507,307.3120623806979,3278.258928659777) in direction: (0.4615866170446841,0.08002612425889047,0.8834781346481331) (local position: (2.727927650849352,-6.337937619302068,2.700892945490978)) (local direction: (0.4615866170446841,0.08002612425889047,0.8834781346481331)). Previous phys volume: 'hEcalTower'
    
    Likely geometry overlap - else navigation problem ! *** Trying to get *unstuck* using a push - expanding step to 1e-07 (mm) ... Potential overlap in geometry !
    
    *** This is just a warning message. *** -------- WWWW -------- G4Exception-END --------- WWWW -------
    
    -------- EEEE ------- G4Exception-START -------- EEEE ------- *** G4Exception : GeomNav0003 issued by : G4Navigator::ComputeStep() Stuck Track: potential geometry or navigation problem. Track stuck, not moving for 25 steps. Current phys volume: 'hEcalTower' - at position : (-200.2220716567705,307.3120625007367,3278.258929984995) in direction: (0.4615866170446841,0.08002612425889047,0.8834781346481331) (local position: (2.727928343229479,-6.337937499263262,2.700894270708886)) (local direction: (0.4615866170446841,0.08002612425889047,0.8834781346481331)). Previous phys volume: 'hEcalTower'
    
    Likely geometry overlap - else navigation problem ! Track *abandoned* due to excessive number of Zero steps. Event aborted.
    
    *** Event Must Be Aborted *** G4Track (0xb73228d0) - track ID = 124, parent ID = 115 Particle type : gamma - creator process : eBrem, creator model : eBrem Kinetic energy : 1.32672 MeV - Momentum direction : (0.461587,0.0800261,0.883478) Step length : 1 Ang - total energy deposit : 0 eV Pre-step point : (-200.222,307.312,3278.26) - Physical volume : hEcalTower (G4_AIR) - defined by : Transportation - step status : 1 Post-step point : (-200.222,307.312,3278.26) - Physical volume : hEcalTower (G4_AIR) - defined by : compt - step status : 7 *** Note: Step information might not be properly updated.
    
    -------- EEEE -------- G4Exception-END --------- EEEE -------