Event-of-the-Day

Fri 16 May 2003

Photo of the event-of-the-day for Fri 16 May, 2003.

Today's event of the day is another GEANT event which had a muon turn around before stopping. This time since the muon started and stopped outside of the detector, event classification using history needed to be updated. Previously I had looked for muons that stopped in the detector, now I look for muons that had any space point in the detector. The previous version of the code called this an event type 26 (unknown trigger), since it skipped over the muon. The decay positron in this case gets called a beam positron, because it comes from a muon that stopped outside of the detector (before the first PC stack). With this fix to the MC history event classification, this event gets called type 20 (muon and beam positrons). Above is a photo of today's event, where the green clusters are the muon, and the yellow clusters are the positron.


MCTR information for this event:
 ------ run:   2   event:   11739  geant seeds:   21499719  4  ------
 Have   8  MonteCarlo tracks
MCTR: itrack=  1 pid= 65 istop= 0 V=    0.0853   -1.2251 -300.0000 P=     0.114    -0.002    29.708 Q= 1 T=   -27.1 pmag=  29.708 cost=0.999993
MCTR: itrack=  1 pid= 65 istop= 1 V=   -0.9405    0.4195  -79.1704 P=     0.000     0.000     0.000 Q= 1 T=    15.2 pmag=   0.000 cost=    -NaN
MCTR: itrack=  2 pid=  2 istop= 0 V=   -0.9405    0.4195  -79.1704 P=    24.004    -1.879    15.427 Q= 1 T=  6563.4 pmag=  28.596 cost=0.539496
MCTR: itrack=  2 pid=  2 istop= 5 V=   -2.6378   -8.0536   82.3904 P=   -22.361     7.047    14.525 Q= 1 T=  6574.7 pmag=  27.579 cost=0.526641
MCTR: itrack=  4 pid=  3 istop= 0 V=   -0.3375    0.2954  -48.3929 P=     0.367     0.532     0.484 Q=-1 T=  6565.4 pmag=   0.807 cost=0.599020
MCTR: itrack=  4 pid=  3 istop= 2 V=   -0.4078    0.2826  -21.9968 P=     0.000     0.000     0.000 Q=-1 T=  6569.2 pmag=   0.000 cost=    -NaN
MCTR: itrack=  6 pid=  3 istop= 0 V=   -0.4181    0.2305  -21.9967 P=     0.078     0.393     0.031 Q=-1 T=  6567.2 pmag=   0.402 cost=0.077631
MCTR: itrack=  6 pid=  3 istop= 2 V=   -0.4591    0.2966  -33.6599 P=     0.000     0.000     0.000 Q=-1 T=  6571.3 pmag=   0.000 cost=    -NaN


Event classification using MC history information:
nMCWindows:   5
 MCWindow=  1  T0=  0.000000  nMu,nDK,nBeame,nDeltas  0  0  0  0  Min,MaxPl=  0  0  Type=  5  (Empty)
 MCWindow=  2  T0=  3.50000  nMu,nDK,nBeame,nDeltas  1  0  0  0  Min,MaxPl=  1  9  Type=  1  (Muon)
 MCWindow=  3  T0=  0.000000  nMu,nDK,nBeame,nDeltas  0  0  0  0  Min,MaxPl=  0  0  Type=  5  (Empty)
 MCWindow=  4  T0=  6568.00  nMu,nDK,nBeame,nDeltas  0  0  1  2  Min,MaxPl=  1  56  Type=  4  (Beam Positron)
 MCWindow=  5  T0=  0.000000  nMu,nDK,nBeame,nDeltas  0  0  0  0  Min,MaxPl=  0  0  Type=  5  (Empty)
 OVERALL MC EVENT TYPE=  20

Event classification using only TDC information:
 EventType:   20  (Muon -- No Decay (and beam e+'s))
 Windows:   5
  window  1, T0= -10000., DC window= -10000.    -47., hits PC,DC=   0   0, Min,MaxZ=   99.0  -99.0, type=   5 (Empty)
  window  2, T0=      4., DC window=    -47.   1504., hits PC,DC=  12   7, Min,MaxZ=  -59.8  -48.2, type=   1 (Muon)
  window  3, T0=   1504., DC window=   1504.   6518., hits PC,DC=   0   0, Min,MaxZ=   99.0  -99.0, type=   5 (Empty)
  window  4, T0=   6568., DC window=   6518.   8068., hits PC,DC=  29 106, Min,MaxZ=  -59.8   59.8, type=   4 (Beam Positron)
  window  5, T0=   8068., DC window=   8068.  20000., hits PC,DC=   0   1, Min,MaxZ=    4.6    4.6, type=   5 (Empty)

Last modified by Blair Jamieson.