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Status Report for E391aStatus Report for E391a(Continuation of the previous PAC on April)(Continuation of the previous PAC on April)
G.Y.Lim
IPNS, KEK
Group Meeting at the JINR
26th – 29th July 2003
Dzhelepov Laboratory of Nuclear Problems
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After the previous PACAfter the previous PAC
Start assembling the front barrel Continuous fabrication of the central barrel Evacuation test of the downstream section
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E391a DetectorE391a Detector
Upstream section
Downstream section
Middle Section
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Upstream SectionUpstream Section
Module fabrication was done – Dec. 2002Instrument for assembling was fabricated
– Collaboration work with KEK machine shop
Start assembling - August 2003– Will take one month
Evacuation/cosmic test will be done Sep. 2003
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Slide show for FB assemblingSlide show for FB assembling
5th August 2003
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ContinuouslyContinuously
22nd August (Expected)
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CC02CC02Shashlik type of beam counter
Arrived at KEK on 4th July from U. of Chicago
Beam test at pi2 July 2nd ~8th, 2003
8 % resolution @ 1GeV, 10 p.e./MeV deposit
(Very preliminary !!!)
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After CC02 installation After CC02 installation ・・・・・・
Aiming to finish by the end of August
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Middle sectionMiddle section
Module fabrication – Final stage
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Glued plates
0200400600800
1000120014001600
Weeks
Num
ber o
f Plat
es
Glued Plates
50 plates/week
Finish at the middle of Sep.
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Module Stacking
0
5
10
15
20
25
30
35
2003
/2/1
4
2003
/2/2
8
2003
/3/1
4
2003
/3/2
8
2003
/4/1
1
2003
/4/2
5
2003
/5/9
2003
/5/2
3
2003
/6/6
2003
/6/2
0
2003
/7/4
2003
/7/1
8
2003
/8/1
2003
/8/1
5
2003
/8/2
9
2003
/9/1
2
2003
/9/2
6
2003
/10/
10
2003
/10/
24Weeks
Num
ber
of M
odul
es
Stacking on every Wed.
Working more than 8 person
End of September
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Middle sectionMiddle section
Module fabrication – Final stage Vacuum vessel is being constructed
– Competition bid – Hitachi Zosen Ltd.– Will arrive at KEK at the end of Oct. 2003
Assembling scenario was fixed– Collaboration work with Entek
Assembling will be done by the middle of Dec. 2003
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Downstream sectionDownstream sectionAssembling was finished – Sep. 2002 Beam test (Engineering run) – Oct. – Dec. 2002Evacuation test – June 2003
– First time of operation for calorimeter in vacuum – Test for the water cooling mechanism
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Cooling SystemCooling SystemControl PMT temperature within 1 0C
with circulating water
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Installation of the cooling systemInstallation of the cooling system
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Temperature MeasurementTemperature Measurement
Divider
CsI
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We got clear Cosmic responseWe got clear Cosmic response
50C Cooling water 100C Cooling water
150C Cooling water 200C Cooling water
p Q/cm
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Temp. dependencyTemp. dependency
Cosmic Peak position
Cosmic Peak width(sigma)
Normalized by the engineering data
CsI temp. ( 0C)
MeV
/pC
Light Yield : -1.3% / 0C
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ScheduleSchedule
Aug. Sep. Oct. Nov. Dec. Jan. Feb.
FB assembling
CB fabrication
CB assembling
Cosmic test/counter tuning
Start data taking
Evacuate system
Unite three sectionsCheck Membrane
Moving downstream
Cosmic and evacuate test for the upstream
A/D Card upgrade
ADC Replacement
BA and CC05 installationCV PMT install
CC04/CC05 Fabrication CC04 Installation Cooling system
for Barrel
Additional Cabling
Downstream vacuum test
Middle section fabrication Membrane
BCV
Beam
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SummarySummary
E391a is aiming at measuring the BR( KL )– Realizing Step-by-step
Preparation of E391a – Three parts are being prepared in parallel– Manage to catch up the schedule
Prompt start – Well tuned electronics and DAQ at the engineering run– Cosmic test for each detector components– Minimum beam time for tuning