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tubes (17,612 large 20-inch (51 cm) diameter tubes, and 25,600 3-inch (7.6 cm) tubes filling in the gaps between them), immersed in a water pool instrumented with 2400 additional photomultiplier tubes as a muon veto. As of 2022, construction of the detector is well underway. Deploying this
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elements. It will build on the mixing parameter results of many previous experiments. The collaboration was formed in July 2014 and construction began
January 10, 2015. Funding is provided by the Chinese Academy of Sciences, but the collaboration is international. Originally scheduled to begin
159:
Predicted oscillation probability of electron neutrinos (black) oscillating to muon (blue) or tau (red) neutrinos, as a function of distance from source. Existing short-baseline experiments measure the first small dip in the black curve at 500 km/GeV; JUNO will observe the large dip at
146:
The much larger distance to the reactors (compared to less than 2 km for the Daya Bay far detector) makes the experiment better able to distinguish neutrino oscillations, but requires a much larger, and better-shielded, detector to detect a sufficient number of reactor neutrinos.
160:
16000 km/GeV. For reactor neutrinos with an energy of ≈3 MeV, the distances are ≈1.5 km and ≈50 km, respectively. This plot is based on assumed mixing parameters; the measured shape will differ and allow the actual parameters to be computed.
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The quantitative part of the experiment requires measuring neutrino flavour oscillations as a function of distance. This seems impossible, as both the reactors and detector are completely immovable, but the speed of oscillation varies with energy (details at
244:
and determined it has a large non-zero value. Daya Bay will be able to measure the value to ≈4% precision and RENO ≈7% after several years. JUNO is designed to improve uncertainty in several neutrino parameters to less than 1%.
106:) in that region would disrupt the experiment, which depends on maintaining a fixed distance to nearby nuclear reactors. Instead it was moved west to a site (Jingji town, Kaiping, Jiangmen) located 53 km from both of the
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700 m (2,300 ft) underground will detect neutrinos with excellent energy resolution. The overburden includes 270 m of granite mountain, which will reduce cosmic muon background.
209:). As the reactors emit neutrinos with a range of energies, a range of effective distances can be observed, limited by the accuracy with which each neutrino's energy can be measured.
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at approximately 53 km distance. Since the expected rate of neutrinos reaching the detector is known from processes in the power plants, the absence of a certain neutrino
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Page 9 shows a topographical overview of the complex, with a distinctive C-shaped lake near the top of the figure. The lake is clearly the one at
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Ciuffoli, Emilio; Evslin, Jarah; Zhang, Xinmin (August 2013). "The
Neutrino Mass Hierarchy from Nuclear Reactor Experiments".
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taking data in 2023, as of March 2024, the US$ 376 million JUNO facility is slated to come online at the end of 2024.
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424:; Zhan, Liang (16 July 2013). "Unambiguous determination of the neutrino mass hierarchy using reactor neutrinos".
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102:, it was originally to be sited in the same area, but the construction of a third nuclear reactor (the
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Li, Yu-Feng (25 Feb 2014). "Overview of the
Jiangmen Underground Neutrino Observatory (JUNO)".
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354:. Scaling and aligning the image with a map places the experiment at the stated coordinates.
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International
Workshop on Next Generation Nucleon Decay and Neutrino Detectors (NNN16)
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Guo, Cong (2019-10-23). "Status of the
Jiangmen Underground Neutrino Observatory".
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The main detector consists of a 35.4 m (116 ft) diameter transparent
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668:"Underground neutrino experiment facilities under construction in Guangdong"
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T. Adam; et al. (20 September 2015). "JUNO Conceptual Design Report".
559:"China's giant underground neutrino lab prepares to probe cosmic mysteries"
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591:. The 17th International Workshop on Tau Lepton Physics. Louisville.
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Although not the primary goal, the detector is sensitive to
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International
Journal of Modern Physics: Conference Series
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International
Meeting for Large Neutrino Infrastructures
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Neutrino oscillation § Propagation and interference
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The main approach of the JUNO Detector in measuring
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565:. Vol. 627, no. 8005. pp. 715–716.
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302:Jiangmen Underground Neutrino Observatory (JUNO)
201:can give an indication of transition processes.
846:Neutrino detectors, experiments, and facilities
689:
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478:"JUNO International Collaboration established"
830:
645:UNO central detector and calibration strategy
415:
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8:
312:. Conca Specchiulla (Otranto, Lecce, Italy).
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589:Status and Prospects of the JUNO Experiment
19:"JUNO" redirects here. For other uses, see
1606:BNO (Baksan or Baxan Neutrino Observatory)
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90:and perform precision measurements of the
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780:Jiangmen Underground Neutrino Observatory
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587:Stock, Matthias Raphael (December 2023).
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60:Jiangmen Underground Neutrino Observatory
126:sphere containing 20,000 tonnes of
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138:truss supporting approximately 43,200
92:Pontecorvo–Maki–Nakagawa–Sakata matrix
16:Physics experiment at Guangdong, China
786:JUNO at Shanghai Jiao Tong University
7:
100:Daya Bay Reactor Neutrino Experiment
642:Xiao, Mengjiao (3 November 2016).
521:– via Interactions NewsWire.
14:
1570:Long Baseline Neutrino Experiment
70:experiment under construction at
1662:Science and technology in China
557:Conroy, Gemma (15 March 2024).
66:) is a medium baseline reactor
98:Planned as a follow-on to the
1:
887:Lederman–Schwartz–Steinberger
310:Neutrino Oscillation Workshop
299:He, Miao (9 September 2014).
1626:List of neutrino experiments
701:. 2013-09-12. Archived from
112:Taishan nuclear power plants
86:. It aims to determine the
670:. China News Service (ECNS)
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571:10.1038/d41586-024-00694-5
456:10.1103/PhysRevD.88.013008
396:10.1103/PhysRevD.88.033017
104:Lufeng Nuclear Power Plant
18:
755:10.1142/S2010194514603007
666:Ji, Li (April 28, 2022).
1652:Underground laboratories
532:JUNO website, 2022-07-23
507:"Groundbreaking at JUNO"
170:electron antineutrinos (
420:Li, Yu-Feng; Cao, Jun;
88:neutrino mass hierarchy
1657:Neutrino observatories
695:"Introduction to JUNO"
168:is the observation of
161:
44:22.11827°N 112.51867°E
482:Interactions NewsWire
214:atmospheric neutrinos
166:neutrino oscillations
158:
82:province in Southern
941:Neutrino oscillation
334:22.1250°N 112.5095°E
232:Expected sensitivity
195:nuclear power plants
1647:Physics experiments
1611:Kamioka Observatory
747:2014IJMPS..3160300L
448:2013PhRvD..88a3008L
388:2013PhRvD..88c3017C
329: /
128:linear alkylbenzene
49:22.11827; 112.51867
40: /
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134:, surrounded by a
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1368:Heidelberg-Moscow
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1234:
1092:ICARUS (Fermilab)
513:. 10 January 2015
509:(Press release).
366:Physical Review D
339:22.1250; 112.5095
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1519:Neutrino Factory
1272:Hyper-Kamiokande
1035:Super-Kamiokande
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484:. 30 July 2014
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972:Astronomical
860:Cowan–Reines
728:
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707:. Retrieved
703:the original
699:JUNO at IHEP
698:
672:. Retrieved
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616:Wang, Yifang
588:
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486:. Retrieved
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426:Phys. Rev. D
425:
422:Wang, Yifang
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132:scintillator
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1181:KamLAND-Zen
1080:Accelerator
958:(divided by
853:Discoveries
731:: 1460300.
337: /
324:112°30′34″E
280:Wang Yifang
47: /
35:112°31′07″E
1641:Categories
1398:Kamiokande
1353:Gargamelle
1257:Baikal-GVD
1112:NA61/SHINE
1097:MicroBooNE
807:1508.07166
709:2015-01-12
655:. Beijing.
598:2405.07321
543:1910.10343
517:12 January
488:12 January
343: (
321:22°07′30″N
286:References
240:measured θ
226:supernovae
32:22°07′06″N
1553:Cancelled
1373:Homestake
1323:Cuoricino
1287:SuperNEMO
1107:MiniBooNE
956:Operating
763:118556513
738:1402.6143
464:118409330
439:1303.6733
404:119233801
379:1302.0624
228:as well.
222:neutrinos
108:Yangjiang
80:Guangdong
1599:See also
1544:WATCHMAN
1494:JEM-EUSO
1477:Proposed
1463:Soudan 2
1453:SciBooNE
1186:MAJORANA
1136:Collider
1056:Daya Bay
1000:Borexino
962:neutrino
782:web site
674:28 April
631:. Paris.
255:Daya Bay
249:See also
118:Detector
76:Jiangmen
68:neutrino
1524:Nucifer
1343:EXO-200
1296:Retired
1252:ARIANNA
1148:SND@LHC
1102:MINERνA
1061:KamLAND
1049:Reactor
1015:IceCube
985:ANTARES
964:source)
960:primary
946:SN 1987
743:Bibcode
444:Bibcode
384:Bibcode
270:KamLAND
151:Physics
130:liquid
72:Kaiping
1621:SNOLAB
1565:LAGUNA
1509:LEGEND
1428:MINOS+
1403:KARMEN
1378:ICARUS
1348:GALLEX
1303:AMANDA
1282:KM3NeT
1222:KATRIN
1196:PandaX
1071:STEREO
931:τ
926:ν
904:μ
899:ν
872:ν
761:
563:Nature
462:
402:
199:flavor
180:ν
1590:BOREX
1529:P-ONE
1499:GRAND
1484:CUPID
1443:OPERA
1423:MINOS
1418:MACRO
1358:GERDA
1328:DONUT
1313:Chooz
1227:WITCH
1215:Other
1206:XMASS
1176:CUORE
1171:COBRA
1166:AMoRE
1143:FASER
1087:ANNIE
1040:SNEWS
1025:NEVOD
995:BDUNT
980:ANITA
914:DONUT
802:arXiv
759:S2CID
733:arXiv
649:(PDF)
625:(PDF)
593:arXiv
538:arXiv
460:S2CID
434:arXiv
400:S2CID
374:arXiv
306:(PDF)
224:from
84:China
1616:LNGS
1534:SBND
1514:LENA
1489:nEXO
1468:Utah
1448:RICE
1438:NEMO
1433:NARC
1413:LSND
1383:IGEX
1338:ERPM
1318:CNGS
1308:CDHS
1277:JUNO
1267:DUNE
1262:BEST
1201:SNO+
1191:NEXT
1158:0νββ
1122:NuMI
1117:NOvA
1066:RENO
1030:SAGE
1010:HALO
1005:BUST
795:INFN
676:2022
519:2015
511:IHEP
490:2015
275:NOνA
260:RENO
238:RENO
220:and
110:and
64:JUNO
58:The
21:Juno
1585:SOX
1539:UNO
1504:INO
1458:SNO
1408:KGF
1393:K2K
1388:IMB
1363:GNO
1247:ARA
1127:T2K
1020:LVD
990:ASD
793:at
751:doi
567:doi
452:doi
392:doi
78:in
1643::
757:.
749:.
741:.
729:31
727:.
697:.
684:^
651:.
627:.
607:^
579:^
561:.
534:,
498:^
480:.
458:.
450:.
442:.
430:88
428:.
412:^
398:.
390:.
382:.
370:88
368:.
308:.
242:13
216:,
114:.
74:,
937:)
916:(
910:)
889:(
883:)
877:e
862:(
838:e
831:t
824:v
810:.
804::
765:.
753::
745::
735::
712:.
678:.
601:.
595::
573:.
569::
546:.
540::
492:.
466:.
454::
446::
436::
406:.
394::
386::
376::
347:)
191:)
186:e
62:(
23:.
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