2007.5.9FJPPL Suekane1 Nu_2-WP2: R&D of detectors for future high statistics, high precision...
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Transcript of 2007.5.9FJPPL Suekane1 Nu_2-WP2: R&D of detectors for future high statistics, high precision...
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
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
2007.5.9 FJPPL Suekane 3
2006 FJPPL Members
5 from France 4 from Japan
2007.5.9 FJPPL Suekane 4
2006 Mission & Budget plan
Travel expense: 2x ( France <--> Japon )
Exchange Information ofKASKA and Double CHOOZ
2007.5.9 FJPPL Suekane 5
from 2007 Proposal
5 from France 4 from Japan
2007.5.9 FJPPL Suekane 6
2007 Proposal
Travel Expenses
Exchange information to proceed DC R&D
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
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
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
2007.5.9 FJPPL Suekane 10
KASKA & DoubleChooz
Kashiwazaki-Kariwa Nuclear Power Station
Chooz Power Station
Early 2006
2007.5.9 FJPPL Suekane 11
R&Ds were going in parallel
Mass Measurement
KASKA DoubleChooz
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
2007.5.9 FJPPL Suekane 13
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
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
2007.5.9 FJPPL Suekane 16
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îRóøåä∑ã@ îRóøèoì¸ ã@
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ìÒéüó‚ãpånÉiÉgÉäÉEÉÄ
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àÍéüó‚ãpånÉiÉgÉäÉEÉÄ éÂèzä¬É|ÉìÉv
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òFêS
êßå‰ñ_ãÏìÆëïíu
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ÉgÉâÉì ÉXÉtÉ@Å[ÉçÅ[É^
Fast Reactor Pth=140MWFrequent ON/OFFL~25m~150 pen reaction/day
25m
KASKA Prototype@Joyo research reactor
KASKA prototype
Currently taking data
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
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
2007.5.9 FJPPL Suekane 19
Calibration:Wire manipulation
Mechanical Test Test at prototype (planning)
weight
hook hook
Source
(between PMTs)
2007.5.9 FJPPL Suekane 20
Designing WorkWith KEK Engineering Div.
2007.5.9 FJPPL Suekane 21
1/2 scale inner acrylic dorm.=90cm, t=1cm)
-> manufacturing method.-> Test of achievable precision
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
2007.5.9 FJPPL Suekane 23
LoI: hep-ex/0607013
~80 pages
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
2007.5.9 FJPPL Suekane 25
Completed Low-BG Oil-Proof PMT design
2007.5.9 FJPPL Suekane 26
PMT testing box
2007.5.9 FJPPL Suekane 27
PMT Delivery Box
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ǙDZÇÃÉsÉNÉ`ÉÉÇ å©ÇÈÇΩÇflÇ…ÇÕïKóvÇ≈Ç∑ÅB
Ready to GO.
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
2007.5.9 FJPPL Suekane 29
Next Speaker => Dario talks about
French Activities in 2006
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.