2007.5.9fjppl suekane1 nu_2-wp2: r&d of detectors for future high statistics, high precision...
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2007.5.9 FJPPL Suekane 1
Nu_2-WP2:R&D of detectors for future high statistics, high precision experiment
(R&D for reactor anti-neutrino experiments)
F.Suekane, Tohoku Univ.D. Motta, CEA
2007.5.9 FJPPL Workshop
@ KEK
Presenters
In short: R&D for Reactor 13 experiments
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2007.5.9 FJPPL Suekane 2
Contents of this report
•General description of the Project
• 2006 Activities in Japan
•2006 Activities in France
by F.Suekane
by D.Motta
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2007.5.9 FJPPL Suekane 3
2006 FJPPL Members
5 from France 4 from Japan
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2007.5.9 FJPPL Suekane 4
2006 Mission & Budget plan
Travel expense: 2x ( France <--> Japon )
Exchange Information ofKASKA and Double CHOOZ
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2007.5.9 FJPPL Suekane 5
from 2007 Proposal
5 from France 4 from Japan
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2007.5.9 FJPPL Suekane 6
2007 Proposal
Travel Expenses
Exchange information to proceed DC R&D
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2007.5.9 FJPPL Suekane 7
KamLANDSolar experimens
SuperKamikandeK2K, MINOS
Purpose of the experiments
e
2 out of 3 Oscilltions have been confirmed.
Purpose: To find out the 3rd oscillation by Reactor
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2007.5.9 FJPPL Suekane 8
Reactor Neutrino Oscillation
0
0.2
0.4
0.6
0.8
1
1.2
0.1 1 10 100 1000
L(km)
P(_e -->
_e )
13 Measurement by Reactor
sin2213=0.1
Normal Hierarchy
Inverted Hierarchy
KamLAND
€
P ν e → ν e( ) =1− sin2 2θ13sin2 Δm132 L
4E
E=4MeV
Measure 13 at distance 1~2km from reactors
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2007.5.9 FJPPL Suekane 9
Reactor 13 Experiment
Reactors
Near Detector(L<500m)
Far Detector(L~1km)
~1.5km
• Measure Disappearance at a distance 1~2km• Small Oscillation Amplitude => Precise measurement is necessary => 2 detectors to cancel systematics => Underground to reduce cosmic-ray backgrounds
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2007.5.9 FJPPL Suekane 10
KASKA & DoubleChooz
Kashiwazaki-Kariwa Nuclear Power Station
Chooz Power Station
Early 2006
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2007.5.9 FJPPL Suekane 11
R&Ds were going in parallel
Mass Measurement
KASKA DoubleChooz
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2007.5.9 FJPPL Suekane 12
2006.9 KASKA Merged to DCHOOZ
KASKA R&D
Double Chooz R&D
Double Chooz Construction
Japan side France side
The FJPPL fund was used for mutual visits to discuss how to unify the two projects.
Merge 2006.9
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2007.5.9 FJPPL Suekane 13
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2007.5.9 FJPPL Suekane 14
Far detector only
Far & Near detectorstogether
08/2008 2009
sys=2.5%
sys=0.6%
Current limit
20122009 201220112010 2013 2014
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2007.5.9 FJPPL Suekane 15
R&D in Japan before the Merge
KASKA Prototype
0.9m3
Gd-LS
0.05% Gd Liquid Scintillator (900L)
Lead Shields
Cosmic-ray anti-counters
Light shield
Paraffin Blocks
N2
to study Gd signalto study BKGto observe reactor
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2007.5.9 FJPPL Suekane 16
å¥éqòFäi î[ óeäÌ
îRóøåä∑ã@ îRóøèoì¸ ã@
âÒì] ÉvÉâÉOãÏ ìÆëï íu
ìÒéüó‚ãpånÉiÉgÉäÉEÉÄ
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àÍéüó‚ãpånÉiÉgÉäÉEÉÄ éÂèzä¬É|ÉìÉv
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òFêS
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Fast Reactor Pth=140MWFrequent ON/OFFL~25m~150 pen reaction/day
25m
KASKA Prototype@Joyo research reactor
KASKA prototype
Currently taking data
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2007.5.9 FJPPL Suekane 17
PMT
TTS=2.5ns
Low BKG Glass
Hamamatsu 10"PMT
It is possible to make10"PMT glass as low BKG.
~400/detector13% coverage
1pe signals
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2007.5.9 FJPPL Suekane 18
Gd-LS long term stability tests
(preliminary)
BC521 : Pseudocumen(PC) : Tetradecane(TD)
= A ‥ 20% : 20% : 60% B ‥ 30% : 10% : 60% C ‥ 20% : 10% : 70%
T=20deg
T=30deg
T=40deg
No aging at room temp. for 240days
KASKAcandidate
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2007.5.9 FJPPL Suekane 19
Calibration:Wire manipulation
Mechanical Test Test at prototype (planning)
weight
hook hook
Source
(between PMTs)
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2007.5.9 FJPPL Suekane 20
Designing WorkWith KEK Engineering Div.
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2007.5.9 FJPPL Suekane 21
1/2 scale inner acrylic dorm.=90cm, t=1cm)
-> manufacturing method.-> Test of achievable precision
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2007.5.9 FJPPL Suekane 22
Construction sequence
âFíàê ÉgÉâÉbÉJÅ[ê›íu PMTéxéùëï íuâ∫ïî ê›íu äOïî ÉAÉNÉäÉãóeäÌâ∫ïî ê›íu ì‡ ïî ÉAÉNÉäÉãóeäÌê›íu äOïî ÉAÉNÉäÉãóeäÌëgóß
ì‡ ïî ÉAÉNÉäÉãóeäÌÉ ÉÄÉjÅ[ãyÇ—PMTéÊÇËït ÇØ
äOïî ÉAÉNÉäÉãóeäÌÉ ÉÄÉjÅ[éÊÇËït ÇØ
PMTéÊÇËït ÇØÉ ÉÄÉjÅ[ÇÉXÉeÉìÉåÉXÉ ÉìÉNÇ…å≈íË
ìSÉVÅ[ÉãÉhÅAè„ïî âFíàê¸ÉgÉâÉbÉJÅ[ê›íu
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2007.5.9 FJPPL Suekane 23
LoI: hep-ex/0607013
~80 pages
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2007.5.9 FJPPL Suekane 24
After the Merge to DCHOOZ
7m
HV
DividerMonitor
PMT(~800)
Tefloncable
Electro-nics
Front-EndElectronics
Take responsibility of PMT system
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2007.5.9 FJPPL Suekane 25
Completed Low-BG Oil-Proof PMT design
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2007.5.9 FJPPL Suekane 26
PMT testing box
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2007.5.9 FJPPL Suekane 27
PMT Delivery Box
QuickTime˛ Ç∆TIFFÅiLZWÅj êLí£ÉvÉçÉOÉâÉÄ
ǙDZÇÃÉsÉNÉ`ÉÉÇ å©ÇÈÇΩÇflÇ…ÇÕïKóvÇ≈Ç∑ÅB
Ready to GO.
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2007.5.9 FJPPL Suekane 28
2007 and Beyond2007 20092008 2011 2012 2013
1 2 3 4 5 6 7 8 9 O N D 1 2 3 4 5 6 7 8 9 O N D 1 2 3 4 5 6 7 8 9 O N D
FARInstallation
Activity in Japan
Activity in France
Receive, test
FAR data taking start
NEAR
NEAR data taking start
400PMTproduction
400PMTproduction
test test
Installationpreparation
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2007.5.9 FJPPL Suekane 29
Next Speaker => Dario talks about
French Activities in 2006
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2007.5.9 FJPPL Suekane 30
Summary
* Now Japan and France projects have unified as Double Chooz.
* Full proposal in 2006 (hep-ex/0606025)
* Material procurement underway
* 2007/08 is the DCHOOZ (Far det.) construction phase.
* The first data taking is expected to start in 2008 and the first result is expected to come out in 2010.