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2007.5.9FJPPL Suekane1 Nu_2-WP2: R&D of detectors for future high statistics, high precision experiment (R&D for reactor anti-neutrino experiments) F.Suekane,

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Presentation on theme: "2007.5.9FJPPL Suekane1 Nu_2-WP2: R&D of detectors for future high statistics, high precision experiment (R&D for reactor anti-neutrino experiments) F.Suekane,"— Presentation transcript:

1 2007.5.9FJPPL Suekane1 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

2 2007.5.9FJPPL Suekane2 Contents of this report General description of the Project 2006 Activities in Japan 2006 Activities in France by F.Suekane by D.Motta

3 2007.5.9FJPPL Suekane3 2006 FJPPL Members 5 from France4 from Japan

4 2007.5.9FJPPL Suekane4 2006 Mission & Budget plan Travel expense: 2x （ France Japon ） Exchange Information of KASKA and Double CHOOZ

5 2007.5.9FJPPL Suekane5 from 2007 Proposal 5 from France4 from Japan

6 2007.5.9FJPPL Suekane6 2007 Proposal Travel Expenses Exchange information to proceed DC R&D

7 2007.5.9FJPPL Suekane7 KamLAND Solar experimens SuperKamikande K2K, MINOS Purpose of the experiments e   2 out of 3 Oscilltions have been confirmed. Purpose: To find out the 3rd oscillation by Reactor

8 2007.5.9FJPPL Suekane8  13 Measurement by Reactor sin 2 2  13 =0.1 Normal Hierarchy Inverted Hierarchy KamLAND E=4MeV Measure  13 at distance 1~2km from reactors

9 2007.5.9FJPPL Suekane9 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

10 2007.5.9FJPPL Suekane10 KASKA & DoubleChooz Kashiwazaki-Kariwa Nuclear Power Station Chooz Power Station Early 2006

11 2007.5.9FJPPL Suekane11 R&Ds were going in parallel Mass Measurement KASKA DoubleChooz

12 2007.5.9FJPPL Suekane12 2006.9 KASKA Merged to DCHOOZ KASKA R&D Double Chooz R&D Double Chooz Construction Japan sideFrance side The FJPPL fund was used for mutual visits to discuss how to unify the two projects. Merge 2006.9

13 2007.5.9FJPPL Suekane13

14 2007.5.9FJPPL Suekane14 Far detector only Far & Near detectors together 08/2008 2009  sys =2.5%  sys =0.6% Current limit 2012 200920122011201020132014

15 2007.5.9FJPPL Suekane15 R&D in Japan before the Merge KASKA Prototype 0.9m 3 Gd-LS to study Gd signal to study BKG to observe reactor

16 2007.5.9FJPPL Suekane16 Fast Reactor P th =140MW Frequent ON/OFF L~25m ~150 p  e  n reaction/day 25m KASKA Prototype@Joyo research reactor KASKA prototype Currently taking data

17 2007.5.9FJPPL Suekane17 PMT TTS=2.5ns Low BKG Glass Hamamatsu 10"PMT It is possible to make10"PMT glass as low BKG. ~400/detector 13% coverage 1pe signals

18 2007.5.9FJPPL Suekane18 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 KASKA candidate

19 2007.5.9FJPPL Suekane19 Calibration: Wire manipulation Mechanical Test Test at prototype (planning) weight hook Source (between PMTs)

20 2007.5.9FJPPL Suekane20 Designing Work With KEK Engineering Div.

21 2007.5.9FJPPL Suekane21 1/2 scale inner acrylic dorm.  =90cm, t=1cm) -> manufacturing method. -> Test of achievable precision

22 2007.5.9FJPPL Suekane22 Construction sequence

23 2007.5.9FJPPL Suekane23 LoI: hep-ex/0607013 ~80 pages

24 2007.5.9FJPPL Suekane24 After the Merge to DCHOOZ ７ｍ HV Divider Monitor PMT (~800) Teflon cable Electro- nics Front-End Electronics Take responsibility of PMT system

25 2007.5.9FJPPL Suekane25 Completed Low-BG Oil-Proof PMT design

26 2007.5.9FJPPL Suekane26 PMT testing box

27 2007.5.9FJPPL Suekane27 PMT Delivery Box Ready to GO.

28 2007.5.9FJPPL Suekane28 2007 and Beyond 200720092008201120122013 123456789OND123456789OND123456789OND FAR Installation Activity in Japan Activity in France Receive, test FAR data taking start NEAR NEAR data taking start 400PMT production 400PMT production test Installation preparation

29 2007.5.9FJPPL Suekane29 Next Speaker => Dario talks about French Activities in 2006

30 2007.5.9FJPPL Suekane30 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.

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