6Apr2001

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Coincidence Filter and the 1X8 Data E. Gregores,
M. Souza, S.F.N.
PDT (drift tube)
WAMUS (central)
A (A?) CMSC (scintillator)
B Muon Detector C (Cosmic
Cap) MDT (drift
tube) FAMUS (forward) FMSC
(scintillator) 8 octants in the transversal
plane 3, 4 or 5 barrels along the z-axis The B
and C layer central counters have two
PMTs Purpose pass events with coincidence
between A and C layers
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// Run the muon unpacker and check if there are
at least 2 hits int nHit _muoUnpack-getMuoHitCol
lection()-getMSCHits().size() //
Gets the collection of muon hits. const
MSCHitCollection mscCollection _muoUnpack-
getMuoHitCollection()-getMSCHits()
// Checks for hits at layer-octant
1 for(chanId _param11 chanId !haveHit chanId) index
generic.getMuoIndex(_param10, chanId)
nHit mscCollection.getNHits(index)
if(nHit ! 0) haveHit true // Checks for
hits at layer-octant 2 if(haveHit) for(chanId
_param21 chanId !_gotCoincchanId) index
generic.getMuoIndex(_param20, chanId)
nHit mscCollection.getNHits(index) if(nHit
! 0) _gotCoinc true
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C Layer
1
2
3
0
A Layer
West
East
7
4
5
6
5
We construct the RCP file to list the relevant
channel ID 15 14,13 12,11 10,9,8 7
6,5,4,3,2,1,0 Type Region Layer Octant
Sub-Oct PMT Drift Central A,
B, C 0, , 7 Scint N or
S Addresses for A C layers and octants 0 to 7
in the RCP file crate initial
final ? ? ?
int A0 ( 80 32768 32943 )
? ? int C7 ( 80
38656 38815 ) Tool parameters in the
trigger list MUOHITCOINC L3TMuoHitCoinc(layerocta
nt1"A1", layeroctant2"C1")
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Coincidences in the 1X8 Data We used two raw
data sets store_1x8_0000117016_004.raw
04/Apr store_1x8_0000117086_001.raw
05/Apr We looked for coincidence in the
layer-octants A1-C1 A2-C2 A3-C3 A4-C4
A5-C5 A6-C6 A7-C7 We got 71 coincidences
in 4737 events 2160 coincidences in 8859 events
7
4737 events
1
27
1
2
24
9
3
0
7
4
0
10
5
6
0
0
8
8859 events
641
874
1
2
443
3
3
0
7
4
194
0
5
6
4
1
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Some special events
3 Layer Coincidence Octant 2 35179, 36117,
38442
Octant 3 36080 2 Coincidences
Octants 0 0 35482 Octants
0 2 35587 Octants 2 4
35520 Octants 3 3 37002 3
Coincidence Octants 0, 3 4
33794 4 Coincidence Octants 2, 2,
3 3 36389
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Run number 117016, Event Number 35587 Data MSC
Hit Address MuoSectionIndex region0 type1
layer0 octant0 barrel1 MuoCellIndex plane
0 eta 2 phi 2 tube 0 Data MSC Hit
Address MuoSectionIndex region0 type1
layer0 octant2 barrel2 MuoCellIndex
plane0 eta0 phi8 tube0 Data MSC Hit
Address MuoSectionIndex region0 type1
layer0 octant2 barrel3 MuoCellIndex
plane0 eta1 phi8 tube0 Data MSC Hit
Address MuoSectionIndex region0 type1
layer2 octant0 barrel3 MuoCellIndex plane
0 eta 0 phi 0 tube 0 Data MSC Hit
Address MuoSectionIndex region0 type1
layer2 octant2 barrel3 MuoCellIndex plane
0 eta 3 phi 1 tube 0
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Future improvements Implement the
method getTime() and getTimeError()
Hedin/Fortner to access the first and second
time in the MSCHits of both PMTs in the C
layer.