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Yifang Wang Institute of High Energy Physics Elba, May 22, 2012
Future plans of IHEP Yifang Wang Institute of High Energy Physics Elba, May 22, 2012
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2. BEPCII: High Lumi. Double–ring Collider
BEPCII/BESIII: Operational since 2009 2. BEPCII: High Lumi. Double–ring Collider
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BESIII data taking status & plan
Previous Data set BESIII Near future J/psi BESII 58M 2009:200M,2012:1 B Psi’ CLEO:28 M 2009:100M,2012:0.4 B Psi” CLEO:0.8 /fb 2010:0.9/fb,2011:2.6/fb y(4040)/y(4160) & scan CLEO:0.6/fb @ y(4160) y(4040) 2013:4/fb R scan & Tau BESII 2014 BESIII will continue for the next 8-10 years
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Daya Bay experiment
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Results: observation of Electron Anti-neutrino Disappearance
After 55 days of data taking, we observed a deficit: R = ±0.011 (stat) ±0.004 (syst) Sin22q13 = 0.016(stat) 0.005(syst) c2/NDF = 4.26/4 5.2 σ for non-zero θ13 2018/11/11
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A Future Reactor Neutrino Experiment for Mass Hierarchy
Daya Bay New exp. Detector: 20kt liquid scintillator Energy reso.: 2-3% Scientific goal Mass hierarchy Precision meas. of mixing matrix elements Supernovae Geo-neutrino Atmospheric neutrinos Sterile neutrinos Exotic searches
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An Ideal Location Distance to reactor cores ~ 60 km
Total 12 cores, thermal power ~ 36 GW Overburden ~ 2000m.w.e
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Mass hierarchy 20 kt LS, 15000 20” PMT Start operation: 2022 ? 6 years
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20” UBA/SBA photocathode PMT is also a possibility
Technical challenges Requirements: Large detector: 20 kt LS Energy resolution: 2%/E 2500 p.e./MeV Ongoing R&D: Low cost, high QE “PMT” Highly transparent LS: 15m >25m Now: 1kt 250 p.e./MeV 20” UBA/SBA photocathode PMT is also a possibility 5”MCP-PMT ~ 2 QE improvement
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Underground Dark Matter Search
Challenge: backgrounds increase with mass ? How to reach ~1t ? Answer: reject backgrounds by pulse shape discrimination CsI(Na) Good n/g separation High light yield
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Further study Better to be at low temperature gamma alpha
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A Prototype to be built at Daya Bay
A real 1 ton experiment is still under discussion
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HERD:Onboard China’s Space Station
Charge detector: 2-layered Si+PIN. Charge measurement Shower Tracker: W+scintillation fibers Nucleon Tracker: scintillation fibers. ECAL: lepton calorimeter. e/γ energy. HCAL: hadron calorimeter. e/p discrimination and CR composition. PWO or BGO W+ CsI(Na) + Fiber + ICCD Neutron detector: B-doped plastic scintillator for delayed signals. Enhanced e/p discrimination.
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3D Digital Calorimeter for Space Station
CsI(Na) crystal + Tungston plate Readout by fiber+ICCD For γ,e: 30GeV—10TeV For H,He,C,… : 30GeV—100TeV Low power Mature technology
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Yang-Ba-Jin Cosmic-ray observatory
~3TeV ~300GeV Sino-Italian ARGO experiment (RPC hall) Sino-Japanese AS γ experiment (scintillation detector array) Sino-Italian ARGO experiment (part of RPC carpet) ASγ scintillation detector
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Large High Altitude Air Shower Observatory
LHAASO Large High Altitude Air Shower Observatory 2018/11/11 西藏羊八井大型高海拔空气簇射观测站LHAASO
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Scientific goal: origin of UHE cosmic-rays & γ-ray astronomy
Cosmic-ray energy spectrum covering both “Knee” with absolute energy scale : understand acceleration mechanism Sensitivity to g-ray sources
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ATLAS & CMS construction
Summary BESIII construction BESIII physics Future ? ATLAS & CMS construction ATLAS & CMS physics ILC Daya Bay construction Daya Bay physics Daya Bay II Dark matter exp. ASg ARGO ASg & ARGO physics LHAASO HXMT HXMT physics Space sta. exp. 2005 2010 2015
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