Eun-Ju JeonSejong Univ.Sept. 09, 2010Status of RENO ExperimentNeutrino Oscillation Workshop (NOW 2010) September 4-11, 2010, Otranto, Lecce, Italy

Outline Overview of the RENO Experiment - YongGwang Power Plant - Experimental Setup - Statistical & Systematic Uncertainties - Expected 13 Sensitivity - Schedule Construction Status of the RENO Experiment - Tunnel - Detector - DAQ & Data Analysis Tools

RENO Collaboration (13 institutions and 40 physicists) Chonnam National University Chonbuk National University Dongshin University Gyeongsang National University Kyungpook National University Pusan National University Sejong University Seokang Information University Seokyeong University Seoul National University Sungkyunkwan University Institute of Nuclear Research RAS (Russia) Institute of Physical Chemistry and Electrochemistry RAS (Russia) +++ http://neutrino.snu.ac.kr/RENO

Located in the west coast of southern part of Korea ~250 km from Seoul 6 reactors are lined up in roughly equal distances and span ~1.3 km Total average thermal output ~16.4GWth (2nd largest in the world)YongGwang Nuclear Power PlantYongGwang():= glorious[splendid] light

RENO Experimental Setup

Google Satellite View of Experimental Site

Schematic View of Underground Facility

RENO Detector 354 10 Inner PMTs : 14% surface coverage 67 10 Outer PMTs

2.73 GW per reactor 6 reactors 1.21x1030 free protons per targets (16 tons) Near : 1,280/day, 468,000/year Far : 114/day, 41,600/yearExpected Number of Neutrino Events at RENO

Expected Systematic Uncertainty

Systematic SourceCHOOZ (%)RENO (%)Reactor related absolute normalizationReactor antineutrino flux and cross section1.9< 0.1Reactor power0.70.2Energy released per fission0.6< 0.1Number of protons in targetH/C ratio0.80.2Target mass0.3< 0.1

Detector EfficiencyPositron energy0.80.1Positron geode distance0.10.0Neutron capture (H/Gd ratio)1.0< 0.1Capture energy containment0.40.1Neutron geode distance0.10.0Neutron delay0.40.1Positron-neutron distance0.30.0Neutron multiplicity0.50.05combined2.7< 0.5

RENO Expected Sensivity

ScheduleExcavation &Underground FacilityConstructionDetectorCommissioningDetectorConstructionGeological Survey& Tunnel DesignActivitiesDetector Design& Specification20062007200820093201036912Activities Tunnel facility, detector structure & buffer steel tanks completed June 2010 : Acrylic containers installed Aug. 2010 : PMT test completed Sep. 2010 : Installation of PMTs, veto tyvek and liquid handling system Oct. 2010 : Installation of DAQ & HV and filling with liquid scintillator Nov. 2010 : Closing and detector commissioning Dec. 2010 : Start data taking

Comparison of Reactor Neutrino Experiments

ExperimentsLocationThermal Power(GW)DistancesNear/Far(m)DepthNear/Far(mwe)Target Mass(tons)Cost(US $)# of peopleDouble-CHOOZFrance8.7410/1050115/30010/10?> 160RENOKorea17.3290/1380120/45016/16~10M40Daya BayChina11.6360(500)/1985(1613)260/910402/80?> 230

Summary of Construction Status03~11, 2007 : Geological survey and tunnel design are completed.06~12, 2008 : Construction of both near and far tunnels are completed.12, 2008 ~ 06, 2009 : Veto tanks and peripheral facilities (electricity, air circulation, drainage, network, etc.) are completed.11, 2008 : SK new electronics were adopted and ready. 06~11, 2009 : Buffer steel tanks are installed06, 2010: Acrylic containers are installed.08, 2010: PMT test is completedPMT installation is underway.Both near and far detectors are expected to be ready for data-taking in late 2010.

Tunnel Construction(2008.6~2008.12)by Daewoo Eng. Co. Korea

Near & far tunnels are completedby Daewoo Eng. Co. Korea(2008.6~2009.3)Near siteFar site

by NIVAK Co. KoreaVertical detector halls & steel structure are ready (2008. 12~2009. 06)

Experimental Hall

by NIVAK Co. KoreaBuffer steel tanks are installed(2009.6~2009.11)

Installation of Acrylic Vessels (2010. 6)

PMT Holder (2009. 10~12) and Mounting (2010. 9)

Summary RENO is suitable for measuring q13 (sin2(2q13) > 0.02) RENO is near completion. Data taking is expected to start in late 2010.

Backup

New Reactor Neutrino q13 Experiment Lower background - Improved detector design - Increased overburden CHOOZ : Rosc = 1.01 2.8% (stat) 2.7% (syst) Larger statistics - More powerful reactors (multi-core) - Larger detection volume - Longer exposure Smaller experimental errors - Identical multi detectors Obtain ~1% precision !!!

DistanceProbabilit e1.01200 to 1800 metersObseved flux before oscillationOscillations observed as a deficit of anti-neutrinosExperimental Method of q13 Measurement

Detection of Reactor Neutrinosdata from CHOOZ hep-ex/0301017v1

Near detector site: tunnel length : 110m overburden height : 46.1m(2007.3~2007.8)Rock Quality Map

Design of TunnelsExperimental hallExperimental hallWing tunnel(L)Wing tunnel(R)DetectorWing tunnel(R)Access tunnelAccess tunnelDetectorvertical hall(2007.9~2007.11)Design of Tunnel

Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*Eunju Jeon, Sejong Univ., Current Status of RENO Experiment, NOW2010*