27 June 2006 Shuei YAMADA, MEG PSI 1 MEG Software Status and Prospects MEG Software group.
MEG Experiment - PSI
Transcript of MEG Experiment - PSI
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MEG ExperimentStatus and prospects
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Our goal:
A “significant” result before any LHC discovery
presented last year
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LHC Luminosity Profile
100 fb-1/yrSHUTDOWN
1000 fb-1/yr
200
fb-1
/yr
3000
300
30
10-20 fb-1/yr
SUSY@1TeV
SUSY@3TeV
Z’@6TeV
ADD X-dim@9TeV
Compositeness@40TeV
H(120GeV)γγ
Higgs@200GeV
L = 1033 L = 1034 SLHC: L = 1035
Michel Della NegraCMS week (Sep.2005)
First physics run: O(1fb-1)0.5 ~ 10 fb-1 by the end of 2008
presented last year
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Publish in 2008 the “significant” result
Start data taking in 2006to fully test the whole experiment
Full data taking in 2007
MEG
presented last year
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Publish in 2008 the “significant” result
Start data taking in 2006to fully test the whole experiment
Full data taking in 2007
MEG
presented last year
?
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Publish in 2008 the “significant” result
Start data taking in 2006to fully test the whole experiment
Full data taking in 2007
MEG
presented last year
??
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Dec
Nov
Oct
Sep
Aug
Jul
Jun
MEG schedule 2006
• Installation coordination by Wataru• Run coordination by Malte
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Dec
Nov
Oct
Sep
Aug
Jul
Jun
MEG schedule 2006
• Installation coordination by Wataru• Run coordination by Malte
DC+TC Run
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Detector Installation
Drift Chambers (8 out of 16) Timing Counters (bars, not fibers)
Stopping Target
Gas Control System(Cobra+DC)
N2 Bag
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Data Acquisition
Trigger & Splitter
Online
Waveform Digitizer(DRS)
Online PCsTC data
DC data
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Publish in 2008 the “significant” result
Started “data taking” in 2006
Full data taking in 2007
MEG
?
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Publish in 2008 the “significant” result
Started “data taking” in 2006
Full data taking in 2007
MEG
without LXe detector
?
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LXe CalorimeterLiquid circulatingpurifier
Liquid pump(100L/h)
Purifier1000L storage dewar
Cryocooler(100W)
LN2
LN2
Getter+Oxysorb
GXe pump(10-50L/min)
GXe storage tank
Cryocooler(150W)
Heat exchanger
Status of the LXe detector
~900L kept
cryostat honeycomb • SIMIC problems (deformation, neglect)• honeycomb pressure test failures (twice)
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Tasks & Problems DC
TC
LXe
Trigger/DAQ
Computing
gas leakagebuild / rebuild the chamberstrack reconstruction code still missing
much higher rate than expected - PMT lifefiber detectors (APD electronics) & laser systemredesign & build N2 bagsfurther tests/calibration at Frascattimatching with DC tracks
honeycomb window ready this week - pressure testC-W will arrive earlier! - testing mid-April
data rate limited at 5Hz (full detector) - toward 100Hz?DRS3 probably not for 2007
add more resources ~300kCHF - expect >50% paid by PSIdata size reduction (9MB/event)
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Tasks & Problems DC
TC
LXe
Trigger/DAQ
Computing
gas leakagebuild / rebuild the chamberstrack reconstruction code still missing
much higher rate than expected - PMT lifefiber detectors (APD electronics) & laser systemredesign & build N2 bagsfurther tests/calibration at Frascattimatching with DC tracks
honeycomb window ready this week - pressure testC-W will arrive earlier! - testing mid-April
data rate limited at 5Hz (full detector) - toward 100Hz?DRS3 probably not for 2007
add more resources ~300kCHF - expect >50% paid by PSIdata size reduction (9MB/event)
Ready in mid-June
Ready in mid-May(N2 bag by April)
Cryostat delivery in mid-April
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N2 bag CW
LXe cryostatdelivery
TC
CW
LXe
N2+EC(US)
DC
TC(US)
DC
N2+TC(DS) CW
Beam CommisionEC+IS
BTS
LXe to PiE5
MEG schedule 2007
Other experiment might be accommodated in Apr-Maywith minimum interference
Running Strategy?• calibration runs• beam intensity optimization• blind analysis• likelihood analysis
Tokyo Physics Meeting in March
“contingency” included
gas
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Publish in 2008 the “significant” result
Started “data taking” in 2006
Hopeful forfull data taking in 2007
MEG
without LXe detector
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Background and Sensitivity Measured SimulationGamma Energy (%) 4.5-5.0 Gamma Timing ~0.15Gamma Position (mm) 4.5-9.0Gamma Efficiency (%) >40e+ Timing (nsec) 0.1e+ Momentum (%) 0.8e+ Angle (mrad) 10.5e+ Efficiency (%) 90Muon Decay Point (mm) 2.1Muon Rate (108/sec) 0.25-0.35Running Time (107sec) 4.0Accidental Rate (10-14) 1.9-3.0# Accidental Events 0.690% CL Limit (10-13) 0.9-1.4
Updated number should be availableafter Physics Meeting in Tokyo, March 29-30
} needs reevaluation+ info from ‘06 data
under intensive studywith “2007 setup”