1 PID in the MICE Experiment •To eliminate false emmitance signatures by pions and decay positrons in the MICE cooling channel. •TOF0, TOF1, CKOV1 reject pions (~10 - 3 ) in upMice. •TOF1, TOF2, EMCAL reject muon (~10 - 3 )decays in dwnMice. • Painting with Broad Strokes.(Ghislain Gregoire, Don Summers, Maurizio Bonesini, Rickard Sandstrom, Ludvico Tortora, Vittorio Palladino PID Coord.) TOF0 CKOV1 TOF1 EMCAL TOF2 2MHz 800KHz L. Cremaldi, NFMCC, UCLA Feb, 2007
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PID in the MICE Experiment
•To eliminate false emmitance signatures by pions and decaypositrons in the MICE cooling channel.
•TOF0, TOF1, CKOV1
reject pions (~10-3)
in upMice.•TOF1, TOF2, EMCAL reject
muon (~10-3)decays in dwnMice.
• Painting with Broad Strokes.(Ghislain Gregoire, Don Summers, Maurizio Bonesini, Rickard Sandstrom, Ludvico Tortora, Vittorio Palladino PID Coord.)
TOF0CKOV1
TOF1 EMCALTOF2
2MHz 800KHz
L. Cremaldi, NFMCC, UCLA Feb, 2007
2L. Cremaldi, NFMCC, UCLA Feb, 2007
d~10m
CFD
TOF0 TOF1
CAEN V1290 DAQ
60-70psCounter
60-70psCounter
fAD
C
TDC
shaper
shaper
CAEN V1724
TOF SYSTEM in MICE
t =d
c1+ (
m
p)2
3
σ int rinsic = (1
2.35)2 τ scin
2 +n(n −1)L
2c
⎡ ⎣ ⎢
⎤ ⎦ ⎥
2
+τT − jitter2
⎧ ⎨ ⎪
⎩ ⎪
⎫ ⎬ ⎪
⎭ ⎪ N pe
σTOF = σ int rinsic2 +σ t0
2 +σ Z − position2 +σ electronics
2 +σ time−walk2 +σ momentum
2
Sc int illator+PMT
1 2 4 3 4 CalibrationSystem
1 2 4 4 4 4 4 3 4 4 4 4 4 CFD+ADC
1 2 4 3 4 Trac ker
1 2 4 3 4
TOF Resolution(1)
L. Cremaldi, NFMCC, UCLA Feb, 2007
(GG)
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TOF Scintillator Arrays
•Fast BC404/408
τD
~1.5ns or similar Scintillator. •Hamamatsu 4998 or similar PMTs with fast TTS(160ps), risetime τ∼0.7ps•X-Y array gives
στ
/sqrt(2) at each TOF station.
MCA BC420 - REPSOL
0
20
40
60
80
2900 2925 2950 2975 3000 3025 3050 3075 3100
ID
EntriesMean
RMS
999
1901 3008.
20.03 66.52 / 84
Constant 71.05 2.859Mean 3008. 0.4065
Sigma 10.24 0.2087
TDC counts
Eve
nts/
bin
Frascati testσt
~60ps
L. Cremaldi, NFMCC, UCLA Feb, 2007
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TOF0/1 Resolution (tracker+) (G.G.)
L. Cremaldi, NFMCC, UCLA Feb, 2007
Tom Roberts Malcomb Ellis
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TOF1/2 Magnetic Shielding (G.G.)
Fields are reduced to ~50 gauss near PMTs by a novel mirror plate
•CAEN V1724 8 Channel 14 bit 100 MS/s FlashADC500 ps
Δt resolution•CAEN V1290 TDC
25 ps
Δt resolution
20 ns.div
L. Cremaldi, NFMCC, UCLA Feb, 2007
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Purity Matrix(4)Purity Matrix(4)
• Purity = Percent of good muons for a particular Trigger Configuration.• Muon Purity >99%
Pion Misid < 1.2 x 10-4
CKOV1 PurityCKOV1 Purity
107off/112off 107off/112on 107on/112on
Lucien Cremaldi*, MICE Collaboration Meeting Oct 8-11, RAL.,
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EMCAL
•Positron/muon
range calorimeter at Tracker Solenoid exit.•Grooved Pb
Plates+scintillating fiber (KLOE design). •2 detector designs being studied.•KL-(4)PbSciF or SW-(1)PbSciF+(3)Sci•Analysis Method wTOF1/2+EMCAL being developed.
L. Cremaldi, NFMCC, UCLA Feb, 2007
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TOF/EMCAL Performance Stage6
Rikard
Sandstrom-Geneva
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Summary
• Design of sub-100ps TOF system solid and tested.TOF1/2 Magnetic shielding tough, but solution in hand.
• Aerogel
Cerenkov complimentary pμ>230MeV/c& important at MICE at startup.
• TOF12/EMCAL dwnMICE
system well developed and capable of providing μ->evv