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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
design.
L. Cremaldi, NFMCC, UCLA Feb, 2007
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CKOV1 Threshold CKOV1 Threshold Aerogel Aerogel CountersCounters
Aerogel Counter
L. Cremaldi, NFMCC, UCLA Feb, 2007
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A
B
C
ISIS Beam Line ISIS Beam Line
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Matsushita Electric WorksMatsushita Electric Works
L. Cremaldi, NFMCC, UCLA Feb, 2007
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Matsushita Matsushita Aerogel Aerogel SamplesSamples
n=1.03 n=1.07(1.08) n=1.12
115 x 115 x 10.5 mm3 115 x 115 x 11.5 mm3 115 x 115 x 11.5 mm3
L. Cremaldi, NFMCC, UCLA Feb, 2007
11L. Cremaldi, NFMCC, UCLA Feb, 2007
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0.1
1
10
100
300 400 500 600 700 800
Aerogel Scattering Length
x112x103X108
Sca
tterin
g Le
ngth
Xo
(cm
)
Wavelength (nm)
AerogelAerogel
Scattering LengthScattering Length
L. Cremaldi, NFMCC, UCLA Feb, 2007
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AerogelAerogel
Counter Counter
L. Cremaldi, NFMCC, UCLA Feb, 2007
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FNAL CKOV1 Beam Test FNAL Beam Test FNAL Beam Test
•Prototype Device tested in 120 GeV/c
proton beam.•Good photoelectrons yields at β=1 consistent withsmall aerogel
absorption hypothesis.
~20pe
~26pe
L. Cremaldi, NFMCC, UCLA Feb, 2007
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Number of Photo Electrons vs Frequency
0
10
20
30
40
50
60
70
0 1000 2000 3000 4000 5000 6000 7000
Frequency (kHz)
8in 5PE8in 10PE8in 15PE8in 20PE8in 25PE5in 5PE8inTB
Transistor base breadboard
Resistive base
RCA 8854 Transistor base
L. Cremaldi, NFMCC, UCLA Feb, 2007
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RCA 8854 5" Tube+HV=3KVNIM A69 (1987) 55-75
L. Cremaldi, NFMCC, UCLA Feb, 2007
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TOF/CKOV1 Electronics
•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
rejection.
• Some PID funding issues-contribtions
welcome.
![The MICE Experiment · 2013. 6. 10. · experiment (MICE) [1] is under development at the Rutherford Appleton Laboratory (UK). The muon beam-line has been commissioned, and beams](https://img.dokumen.tips/doc/110x75/60df418f2257450db016b45d/the-mice-experiment-2013-6-10-experiment-mice-1-is-under-development-at.jpg)
