Event-of-the-Day

Sat 3 May 2003

Photo of the event-of-the-day for Sat 3 May, 2003.
Saturday's event of the day is a MC event in which no track starts or stops inside the detector (and none pass all the way through). In fact the only track in the detector is a delta which rebounds off the target and goes back out of the detector from where it started. This type of track prompted me to use space points to classify MC tracks... otherwise for this type of event it seems like there shouldn't have been any tracks. Attached is a photo of this event with just a delta in the detector (run1event18458_0.ps).

The MCTR information for these tracks is:
 ------ run:   1  event:   18458  geant seeds:   698689200  6  ------
 Have   30  MonteCarlo tracks
MCTR: itrack=  1 pid= 65 istop= 0
      V=   -0.4071   -2.2066 -300.0000
      P=     0.055     0.197    29.703 Q= 1
      T=   -27.1 pmag=  29.703 cost=0.999976
MCTR: itrack=  1 pid= 65 istop= 1
     V=   -3.0395   -0.1368  -79.6198
     P=     0.000     0.000     0.000 Q= 1
     T=     0.4 pmag=   0.000 cost=    -NaN
MCTR: itrack=  2 pid=  2 istop= 0
     V=    2.0365   -3.5982 -300.0000
     P=     0.074     0.196    29.682 Q= 1
     T= -6852.5 pmag=  29.682 cost=0.999975
MCTR: itrack=  2 pid=  2 istop=98
     V=    1.7869   -3.5685  150.8218
     P=    -0.825    -2.469    28.848 Q= 1
     T= -6837.3 pmag=  28.965 cost=0.995954
MCTR: itrack=  3 pid=  2 istop= 0
     V=   -3.0395   -0.1368  -79.6198
     P=    -7.538    20.014     2.045 Q= 1
     T=    15.9 pmag=  21.483 cost=0.095180
MCTR: itrack=  3 pid=  2 istop= 5
     V=    2.4901   -0.7537  -80.8848
     P=    -2.495     2.139    -4.060 Q= 1
     T=    18.0 pmag=   5.223 cost=-.777253
MCTR: itrack=  5 pid=  3 istop= 0
     V=    4.2498    1.7038  -79.6589
     P=    -0.319    -3.593    -1.504 Q=-1
     T=    17.9 pmag=   3.908 cost=-.384930
MCTR: itrack=  5 pid=  3 istop= 2
     V=    5.0231    1.2143  -80.1433
     P=     0.000     0.000     0.000 Q=-1
     T=    18.0 pmag=   0.000 cost=    -NaN
MCTR: itrack=  6 pid=  3 istop= 0
     V=    4.3409    1.1140  -79.6801
     P=     0.174    -0.215     0.306 Q=-1
     T=    17.9 pmag=   0.412 cost=0.742096
MCTR: itrack=  6 pid=  3 istop= 2
     V=    4.3437    1.1108  -79.6754
     P=     0.000     0.000     0.000 Q=-1
     T=    17.9 pmag=   0.000 cost=    -NaN
MCTR: itrack=  7 pid=  3 istop= 0
     V=    4.2980    0.8159  -79.7406
     P=     0.210    -0.377    -0.638 Q=-1
     T=    17.9 pmag=   0.770 cost=-.828088
MCTR: itrack=  7 pid=  3 istop= 2
    V=    4.2999    0.8127  -79.7461
    P=     0.000     0.000     0.000 Q=-1
     T=    17.9 pmag=   0.000 cost=    -NaN
MCTR: itrack=  8 pid=  3 istop= 0
     V=    3.6769   -0.3610  -79.9747
     P=    -0.317     0.130     0.039 Q=-1
     T=    18.0 pmag=   0.345 cost=0.112703
MCTR: itrack=  8 pid=  3 istop= 2
     V=    3.6710   -0.3589  -79.9740
     P=     0.000     0.000     0.000 Q=-1
     T=    18.0 pmag=   0.000 cost=    -NaN
MCTR: itrack=  9 pid=  3 istop= 0
     V=    3.1614   -0.7877  -80.1878
     P=     0.051    -0.370    -0.052 Q=-1
     T=    18.0 pmag=   0.377 cost=-.137936
MCTR: itrack=  9 pid=  3 istop= 2
     V=    3.1626   -0.7939  -80.1887
     P=     0.000     0.000     0.000 Q=-1
     T=    18.0 pmag=   0.000 cost=    -NaN
MCTR: itrack= 10 pid=  3 istop= 0
     V=    3.1040   -0.8140  -80.2135
     P=    -3.542    -1.244     0.106 Q=-1
     T=    18.0 pmag=   3.755 cost=0.028308
MCTR: itrack= 10 pid=  3 istop= 2
     V=    2.8249   -2.1131  -49.6354
     P=     0.000     0.000     0.000 Q=-1
     T=    28.1 pmag=   0.000 cost=    -NaN
MCTR: itrack= 12 pid=  3 istop= 0
     V=    5.0789    1.1718  -80.1378
     P=    -0.272     0.035    -0.277 Q=-1
     T=    18.0 pmag=   0.390 cost=-.710814
MCTR: itrack= 12 pid=  3 istop= 2
     V=    5.0744    1.1722  -80.1423
     P=     0.000     0.000     0.000 Q=-1
     T=    18.0 pmag=   0.000 cost=    -NaN
MCTR: itrack= 19 pid=  3 istop= 0
     V=    3.0773   -0.8240  -80.2127
     P=    -0.165    -0.073    -0.383 Q=-1
     T=    18.0 pmag=   0.423 cost=-.904631
MCTR: itrack= 19 pid=  3 istop= 2
     V=    3.0734   -0.8202  -80.2316
     P=     0.000     0.000     0.000 Q=-1
     T=    18.0 pmag=   0.000 cost=    -NaN
MCTR: itrack= 20 pid=  3 istop= 0
     V=    2.5617   -1.7107  -80.0837
     P=     0.025    -0.194    -0.300 Q=-1
     T=    18.0 pmag=   0.358 cost=-.837808
MCTR: itrack= 20 pid=  3 istop= 2
     V=    2.5623   -1.7141  -80.0890
     P=     0.000     0.000     0.000 Q=-1
     T=    18.0 pmag=   0.000 cost=    -NaN
MCTR: itrack= 21 pid=  3 istop= 0
     V=    2.8059   -1.9562  -79.9312
     P=    -0.132     0.250     0.375 Q=-1
     T=    18.1 pmag=   0.470 cost=0.799114
MCTR: itrack= 21 pid=  3 istop= 2
     V=    2.8055   -1.9554  -79.9299
     P=     0.000     0.000     0.000 Q=-1
     T=    18.1 pmag=   0.000 cost=    -NaN
MCTR: itrack= 22 pid=  3 istop= 0
     V=    2.8527   -2.0514  -79.7643
     P=     0.463    -0.359     0.271 Q=-1
     T=    18.1 pmag=   0.645 cost=0.420292
MCTR: itrack= 22 pid=  3 istop= 2
     V=    2.8574   -2.0548  -79.7616
     P=     0.000     0.000     0.000 Q=-1
     T=    18.1 pmag=   0.000 cost=    -NaN
MCTR: itrack= 28 pid=  3 istop= 0
     V=    1.3046   -0.3116  125.5697
      P=    -0.130     0.342     0.204 Q=-1
     T= -6838.2 pmag=   0.418 cost=0.486518
MCTR: itrack= 28 pid=  3 istop= 2
     V=    1.2464   -0.3933  125.2003
     P=     0.000     0.000     0.000 Q=-1
     T= -6837.5 pmag=   0.000 cost=    -NaN

The MC classification (from MCTR and MCSP info):
nMCWindows:   3
 MCWindow=  1  T0=  0.000000  nMu,nDK,nBeame,nDeltas  0  0  0  0
Min,MaxPl=  0  0  Type=  5  (Empty)
 MCWindow=  2  T0=  20.0000  nMu,nDK,nBeame,nDeltas  0  0  0  1
Min,MaxPl=  1  28  Type=  16  (Soft laserlike
uncorrelated track)
 MCWindow=  3  T0=  0.000000  nMu,nDK,nBeame,nDeltas  0  0  0  0
Min,MaxPl=  0  0  Type=  5  (Empty)
 OVERALL MC EVENT TYPE=  26

And the usual event classification from TDC info:
 EventType:   26  (Other, unknown trigger)
 Windows:   3
  window  1, T0= -10000., DC window= -10000.    -30., hits PC,DC=   0
3, Min,MaxZ=  -22.6   29.4, type=   5
(Empty)
  window  2, T0=     20., DC window=    -30.   1520., hits PC,DC=  12
44, Min,MaxZ=  -59.7   49.4, type=  16
(Soft laserlike uncorrelated track)
  window  3, T0=   1520., DC window=   1520.  20000., hits PC,DC=   0
11, Min,MaxZ=  -48.2   47.4, type=   5
(Empty)

Also for this event there was a huge signal in the M scintillator, and
small TDC widths in the PC's...
m12width=  19514.0
pcwidthavg= 70.2
Last modified by Blair Jamieson.