项目大事记/CHRONOLOGY竞赛(一等奖)/Competition(1st Prize):2001规划设计起始时间/Start of Planning:11/2001施工起始时间/Start of Construction:08/2003投入使用/Opening:20/10/2007-21/10/2007项目参数/PROJECT DATA用地面积/...
项目大事记/CHRONOLOGY竞赛(一等奖)/Competition(1st Prize):2001规划设计起始时间/Start of Planning:11/2001施工起始时间/Start of Construction:08/2003投入使用/Opening:20/10/2007-21/10/2007项目参数/PROJECT DATA用地面积/Site Area:约25 000m2/Approx. 25 000m2建筑毛面积/Gross Floor Area:约73 000m2(除坡道)=100%/Approx.73 000m2(excluding ramps)=100%地上建筑毛面积/Gross Floor Area above ground:约28 500m2=40%/Approx.28 500m2=40%地下建筑毛面积/Gross Floor Area underground:约44 500m2=60%/Approx.44 500m2=60%
The Jiangmen Underground Neutrino Observatory(JUNO)features a 20 kt multi-purpose underground liquid scintillator sphere as its main *** of JUNO's features make it an excellent location for^8B solar neutrino measureme...
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The Jiangmen Underground Neutrino Observatory(JUNO)features a 20 kt multi-purpose underground liquid scintillator sphere as its main *** of JUNO's features make it an excellent location for^8B solar neutrino measurements,such as its low-energy threshold,high energy resolution compared with water Cherenkov detectors,and much larger target mass compared with previous liquid scintillator *** this paper,we present a comprehensive assessment of JUNO's potential for detecting^8B solar neutrinos via the neutrino-electron elastic scattering process.A reduced 2 MeV threshold for the recoil electron energy is found to be achievable,assuming that the intrinsic radioactive background^(238)U and^(232)Th in the liquid scintillator can be controlled to 10^(-17)g/*** ten years of data acquisition,approximately 60,000 signal and 30,000 background events are *** large sample will enable an examination of the distortion of the recoil electron spectrum that is dominated by the neutrino flavor transformation in the dense solar matter,which will shed new light on the inconsistency between the measured electron spectra and the predictions of the standard three-flavor neutrino oscillation *** m^(2)_(21)=4.8times10^(-5);(7.5times10^(-5))eV^(2),JUNO can provide evidence of neutrino oscillation in the Earth at approximately the 3sigma(2sigma)level by measuring the non-zero signal rate variation with respect to the solar zenith ***,JUNO can simultaneously measureDelta m^2_(21)using^8B solar neutrinos to a precision of 20% or better,depending on the central value,and to sub-percent precision using reactor antineutrinos.A comparison of these two measurements from the same detector will help understand the current mild inconsistency between the value of Delta m^2_(21)reported by solar neutrino experiments and the KamLAND experiment.
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