KOPIO Catcher System
RSVP Baseline ReviewBrookhaven National Laboratory
April 20, 2005Noboru Sasao / Tadashi Nomura
(Kyoto U.)
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Scope of Catcher System
TASK
– Detect photons passing through the beam hole
– Be insensitive to a vast amount of neutrals in the beam• In order to avoid false vetoes by beam neutrons and surviving KLs
Required photon efficiency
– 99% for photons with E>300MeV• From the spectrum of photons into the catcher after kinematical cuts (do
minated by K2 odd pairing events)
Sensitivity to neutrons
– <0.3% for neutrons with Ekin=800MeV
SCOPE
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Concept of Catcher System
SOLUTION
– Utilize Cherenkov radiation
• Lead and aerogel tile sandwich counter inside the beamnamed “Aerogel Catcher”
• Lead and acrylic slab sandwich counter near the beamnamed “Guard Counter”
aerogel mirror
Cerenkov light
lead sheet
5inch PMTAerogel Catcher Module
Winston-type funnel
Guard CounterConcept
SCOPE
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Principle of Aerogel Catcher
AEROGEL CATCHER
• Lead and aerogel tile counter• Avoid detection of slow particles
from neutron interactions
• Distributed arrangement• Coincidence along the beam
helps us catch forward only
aerogel flat mirror
Cerenkov light
lead sheet
5inch PMTModule
funnel
red: e+/e-, blue: photon
Photon’s EM shower in the module array
AEROGEL CATCHER
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Principle of Guard Counter
GUARD COUNTER
• Lead and acrylic slab counter• Slow particle doesn’t emit Cherenkov light
• Utilize the total reflection anglein light transportation
• Cherenkov lights from slow particlesdon’t fulfill the total reflection condition
Photon Neutron
GUARD COUNTER
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Aerogel Counter (WBS 1.2.6.1)
In-beam Pb-Aerogel Sandwich– Module size: 30cm x 30cm
– Pb converter: 2mm per layer
– Number of modules: 420
• 12-21 in horizontal with beam divergence
• 25 layers along beam(8.3 X0 in total)
– Z gap between layers: 35cm
– Coincidence condition
• >= 4 p.e. in 1st layer (A)
• >= 2 p.e. in 2nd layer (B)
Top view
12m downstream of main detector
Beam envelope
AEROGEL CATCHER
Module
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Guard Counter (WBS 1.2.6.2)
Pb-Acrylic sandwich to cover the halo region• Many soft neutrons around the beam
• Lead & acrylic slab sandwich
– Size: 15cm x 15cm
– 8 layers of 2mm Pb + 10mm acrylic
– Read by 5 inch PMT
– 3 modules along the beam
– Number of modules: 144
Side View
Front View
beam
Module
GUARD COUNTER
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Expected Photon EfficiencyEXPECTED PERFORMANCE
Aerogel Catcher Efficiency
Y position dependence
99% @ 300MeV
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Efficiencies for Other NeutralsEXPECTED PERFORMANCE
Hit probability for Neutrons
0.3% @ 800MeV
Hit probability for KLs
Dominated by decays in the Catcher
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Proof of Principle
Prototype 1 (2001-2)– 1/4 size, flat mirror light yield
Prototype 2 (2002-3)– 1/4 size, parabolic mirror light yield response to proton
(as substitute for neutron) Check single layer eff. /
two-layers’ coincidence
Good agreement with MC(with gas scintillation)
PT2
PT1
PROOF OF PRINCIPLE
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Cost SummaryCOST
Catcher System covered by the contribution from Japan• Japan-US fund
• Labor provided by graduate students
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Example of Level 5 ItemsCOST
Aerogel Counter – Modules (WBS1.2.6.1.1)
• Cost dominated by Aerogel Tile (1.2.6.1.1.1) and PMT (1.2.6.1.1.3)
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Dictionary and Risk AnalysisCOST
Aerogel Counter – Modules (WBS1.2.6.1.1)
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Costs of Key Components (1)
Aerogel tile
– WBS 1.2.6.1.1.1860 k$
Catalog price by Matsushita
Risk The price of new, transparent tiles (YI-50) not fixed yet
COST
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Costs of Key Components (2)
5 inch Photomultiplier
– WBS 1.2.6.1.1.3.1 for Aerogel Catcher
735 k$
– WBS 1.2.6.2.1.3.1for Guard Counter
252 k$
Catalog price with usual discount
for mass production(quoted by Hamamatsu)
COST
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Costs of Key Components (3)
Winston-type funnel
– WBS 1.2.6.1.1.5191 k$
Unofficial quotation by Vendor (Yokohama Kikou Co.Ltd.)
E-mail communication
Test ProductionDone in March
COST
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Labor SummaryCOST
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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ScheduleSCHEDULE
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Schedule Summary
Schedule and Milestones (2006/07 – 2009/07)
– 2006/07 – 2008/09 … Aerogel Counter (WBS 1.2.6.1)• 2008/06/30 Aerogel tile production completed
• 2007/09/27 Delivery of 420 5-inch PMTs completed
• 2008/04/01 Winston-type funnel completed
– 2007/10 – 2008/09 … Guard Counter (WBS 1.2.6.2)• 2008/06/30 Delivery of 144 PMTs completed
– 2008/04 – 2009/01 … Front End Electronics (WBS 1.2.6.3)• 2009/01/30 WFD fabrication completed
– 2007/12 – 2008/12 … Shipping (WBS 1.2.6.4)
– 2008/10 – 2009/04 … Installation (WBS 1.2.6.5)• 2009/04/30 Installation completed
– 2009/06 – 2009/07 … Commissioning (WBS 1.2.6.6)
SCHEDULE
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Cost ProfileFY2005
FY2006 178k$ 1/6 of AC PMT
FY2007 1380k$ 829k$ … 5/6 of AC PMT
551k$ … Half of Aerogel/optical components
FY2008 1389k$ 655k$ …Half of Aerogel/optical components
421k$ … Guard Counter
245k$ … Half of Front End Electronics
FY2009 204k$ 188k$ … Half of FEE
$0
$200,000
$400,000
$600,000
$800,000
$1,000,000
$1,200,000
$1,400,000
Co
st/
FY
FY2005 FY2006 FY2007 FY2008 FY2009 FY2010 FY2011
FY
KOPIO 1.2.6; Cost in FY05 $s
KYO_LV
KYO_HV
KYO_SS
KYO_MTE
KYO_ETE
KYO_ EE
COST & SCHEDULE
April 20-22, 2005 Noboru Sasao / Tadashi Nomura (Kyoto U.) NSF RSVP Baseline Review
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Cost Profile in Japan-US Fund
US FY Sum total
2005
2006 178k$ 178k$
2007 1380k$ 1558k$
2008 1389k$ 2947k$
2009 204k$ 3151k$
COST & SCHEDULE
JFY Sum total
2005 330k$ 330k$
2006 660k$ 990k$
2007 770k$ 1760k$
2008 770k$ 2530k$
2009 440k$ 2970k$
Approved on condition:
RSVP must start
Additional funding from Grant-in-Aid for Science
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