Transcript G4MICE Analysis of KEK Test Beam Aron Fish Malcolm Ellis CM15 10th June 2006 Contents • • • • • • • • • KEK Test Beam Set Up KEK Visualisation (MICEModel) G4MICE Status Data set TOF Set Up TOF.

G4MICE Analysis of
KEK Test Beam
Aron Fish
Malcolm Ellis
CM15
10th June 2006
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Contents
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KEK Test Beam Set Up
KEK Visualisation (MICEModel)
G4MICE Status
Data set
TOF Set Up
TOF Analysis
Sci-Fi Tracker Prototype
Sci-Fi Tracker Analysis
Summary & Next Steps
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KEK Test Beam Set Up
Purpose: Test performance of Tracker prototype in 1-Tesla
magnetic field.
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MICEModel work in G4MICE
• The MICEModel in G4MICE is used to represent any stage of MICE in any
level of detail.
• Representations of the model are produced for specific purposes
(Simulation, Reconstruction, Visualisation…).
• I will just mention the code and files implemented for the KEK Test
Beam.
• The Model allows us to have the same geometry for the Reconstruction
of Data and Geant4 Simulation, so that they can be compared.
• Configuration files have also been implemented, which list the
material, location and orientation etc. of each module in the
MICEModel (TOF, SciFi…) with respect to the other modules.
• Configuration files have now been implemented including all the
MICEModules (Detectors, Magnets, AFCs…) by Ben and Mike + others for
all 6 stages of MICE situated in the Hall at RAL. M. Ellis will talk about
this more in the software summary talk tomorrow.
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MICEModel Set Up of KEK Test Beam
TOF Hodoscope
(Blue & Green Slabs)
Pb Diffuser
T1 & R1
Counters
Solenoid (White)
ACC
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MICEModel Set Up of KEK Test Beam
T1 Counter
R1 Counter
Pb Diffuser
ACC
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MICEModel Set Up of KEK Test Beam
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MICEModel Set Up of KEK Test Beam
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MICEModel Set Up of KEK Test Beam
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G4MICE Status
• The TOF Decoding, Cabling & calibration files & code have now
been written and used in G4MICE.
• Atsushi’s time walk corrections have been used and
implemented into G4MICE.
• The TOF Reconstruction code has now been produced including
“TofSlabHits” & ”TofSpacePoints”.
• VLPC decoding used is that from Osaka (jp map 12).
• VLPC calibration used is that made by Malcolm in November
2005.
• Common Mode Noise algorithm updated (use similar technique
to that described by Hideyuki).
• Clustering algorithm unchanged (2.0 PE total light in a cluster,
neighbouring hits are summed).
• Space point code now takes into account arbitrary rotations
and misalignments (no longer requires trackers to be
perpendicular to the Z axis!).
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• Track reconstruction used for this analysis not final one.
Low Momentum Data Set
• 250 MeV/c
• B = 0, q = 0: Runs 1426 & 1427
• B = 1, q = 3: Runs 1360 & 1367
• 325 MeV/c
• B = 1, q = 3: Runs 1376, 1381 & 1382
• B = 1, q = 6: Run 1342
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High Momentum Data Set
• 3 GeV/c
• B = 0, q = 0: Runs 1257, 1258 & 1272
• B = 0, q = 6: Runs 1291, 1292, 1293, 1294, 1297,
1300, 1302, 1303, 1304, 1306, 1307, 1309 & 1311
• B = 1, q = 6: Runs 1315 & 1317
• Total 396762 triggers (98408 low, 298354
high)
• 62573 pass cuts (L1A and tracking)
• 10781 low
• 51792 high
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TOF Set Up (KEK)
PMT
Light guide
Scintillator
5 X 5 Hodoscope
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TOF Analysis 1
Black: 3 GeV/c
Red: 325 MeV/c
Blue: 250 MeV/c
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TOF Selection
“High P”
“Low P Muons”
“Low P Electrons”
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L1A Selection
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Sci-Fi Prototype
Prototype Tracker consisted of 4 stations.
Stations B & D - 3 Views
Stations A & C - 2 Views
Readout - VLPCs, AFEII, Cryostat.
X View
V View
W View
Station D
2,500 ppm 2,500 ppm 5,000 ppm
Station A
mixture
Station C
5,000 ppm 5,000 ppm
Station B
5,000 ppm 2,500 ppm 3,500 ppm
5,000 ppm
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VLPC Hits
• Common Mode
Noise algorithm
now similar to
that used by
Osaka group.
• Pedestals and
gains those
presented on
18th November
2005.
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Sci-Fi Space Points
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SciFi Space Points
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Sci-Fi Summary 1/2
Low mom. 
Low mom. e
High mom.
Station A Plane V
9.51
8.14
8.00
Station A Plane X
9.98
8.12
7.98
Station B Plane V
9.13
8.21
7.22
Station B Plane X
8.37
7.31
7.21
Station B Plane W
9.74
8.73
8.58
Station C Plane X
9.74
9.41
9.18
Station C Plane W
11.0
8.76
8.86
Station D Plane V
5.96
4.48
3.57
Station D Plane X
5.98
5.15
4.49
Station D Plane W
5.02
5.28
4.28
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SciFi Summary 2/2
Low mom.

Low mom.
e
High mom. Cosmic
Old 2500
9.13
8.21
7.00
Rays
10.6
Old 3500
9.74
8.73
8.58
10.3
Old 5000
9.53
8.33
8.16
8.96
New 2500
5.98
No Plot
4.91
New 5000
5.92
5.28
4.76
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Summary & Next Steps…
• Implement correct digitisation of TOF in
DetResp.
• Update Persist package to take into account
modified TOF and SciFi classes (new
methods).
• Test each stage of the Reconstruction (hits,
clusters, points, tracks, matching) using the
Geant4 simulation of test beam.
• Test Reconstruction of real data (TOF &
SciFi).
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