Brief Introduction to Chinas Astroparticle Physics Programs - PowerPoint PPT Presentation

Brief Introduction to China’s Astroparticle Physics Programs Shuang-Nan Zhang zhangsn@ihep.ac.cn Center for Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences

Outline: major projects in China • Underground experiments • Ground-based CMB • High altitude cosmic rays/gamma-rays • Space missions – Dark energy survey – X-/gamma-rays, cosmic rays, dark matter – Gravitational waves 2016-04-07

Jiangmen Underground Neutrino Observatory (JUNO) � Full funding approved and in construction complete in 2019 � 3/ 103

UL in the world(rock overburden) 700m Y2L 800m Korea � Canfranc Spain � 1100m 600m Boulby 1000m Soudan UK � 1400m Kamioka USA � LNGS Japan � Italy � 1500m Tunnel � 1600m DUSEL Baksan 2400m USA � 1700m CJPL Russia � Mine � Modane 2300m China � France � 2100m Deep Underground Lab SNO Canada � 2016-04-07

World underground laboratories China JinPing Lab � 2016-04-07

Site of CJPL ��� �� II ��� • <1 hr. flight from Chengdu to Xichang; Jin Ping mountain & Ya long River � • ~2 hr. driving from Xichang to JinPing 2016-04-07

Layout of CJPL-I � Total space: 4000 m 3 CDEX � � Main Lab Space: 6.5(W) x 6.5(H) x 42(L) Traffic Tunnel � LBF � PandaX � Preparation Room �

CJPL-II design • Four 12m * 12m * 150m tunnel 2016-04-07

Schedule • Nov. – Dec. 2014, Civil team ready; • Jan. – May 2015, Civil Construction � • June – Sept. 2015 � Internal lining � • Oct. 2015, Acceptance of civil construction; • Nov. 2015 – June 2016, Infrastructure construction 2016-04-07

CJPL-II possible users • CDEX-1T (Ge DM+DBD Exp.) • PandaX-1T (Xe DM Exp.) • Dark matter experiment (e.g. DS-G3) • Nuclear astro-particle physics • …… 2016-04-07

Status of Ali Observatory • IHEP start up funding approved • CAS equipment funding being approved • CNSF research funding being considered 2016-04-07

Large High Altitude Air Shower Observatory Central detector array for cosmic rays 90 k m 2 γ -ray survey telescope; 1 M m 2 EAS detector array LHAASO � 2016-04-07

Status of LHAASO • Construction and equipment funding approved • Research funding being considered by CNSF 2016-04-07

Chinese Space Station Optical Survey • 25000 □ °imaging survey: 250-1050nm, ≥ 6 filters, g, r, & i ≥ AB25 mag (5 σ , point source) • 800 □ °deep imaging survey: g, r, & i ≥ AB26.5 mag • 10000 □ °medium & high galactic latitude slitless spectroscopy survey: g, r, & i continuum ≥ AB21 mag � Survey Science Launch ~2022 � Cosmology: dark energy, dark matter, gravity, large-scale structure, neutrinos, primordial non-Gaussianity… AGNs: high-z AGNs, clustering, dual AGNs, variability, UV excess, host galaxies… Ecliptic Coord. � Galaxies: formation & evolution, mergers, high- zs, dwarfs, LSBs, near field, halos properties… Milky Way: structure, satellites, dust, extinction… Stellar science: formation, dwarfs, metal poor… Solar system (high inclination): TNO 、 NEA… Astrometry: reference frame, star clusters… … 2016-04-07

DAMPE: launched in Dec. 17 2015 2016-04-07

Gamma-ray burst polarization : POLAR • China- Switzerland Tian-Gong 天宫 collaboration – Energy range: 50-350 keV; Palace in FOV of POLAR: ~ ½ sky Heaven • Onboard China’s spacelab TG-2: launch time Sept. 2016 • Main science: GRB jet & central engine; tests of quantum gravity theories Plastic scintillator stacks 2016-04-07

Hard X-ray Modulation Telescope (HXMT) Star ME � Medium (ME): trackers � Si-PIN,5-30 keV, 952 cm 2 High Energy (HE): Normal Mode NaI, 20-250 keV, ~5000 cm 2 CsI, 50-700 keV, ~5000 cm 2 HE � LE � High Energy (HE): GRB Mode Low Energy (LE): NaI, 100-300 keV, 5000 cm 2 SCD,1-15 keV, 384 cm 2 CsI, 250-3000 keV, 5000 cm 2 Launch in Nov. 2016: ~200 GRBs/year � 2016-04-07

SVOM: ~2021 launch 30 keV-5 MeV � 400-650 nm, 650-950 nm � 0.3-5 keV � 4-250 keV � 450-900 nm � 400-1700 nm � GFTs GWAC 2016-04-07

High Energy cosmic-Ray Detector (HERD) n10X acceptance than others, but weight 2.3 T ~1/3 AMS STK(W+SSD) Charge gamma-ray direction CR back scatter 3D CALO e/G/CR energy STK(W+SSD) e/p discrimination Planned launch 2022-2025 � 2016-04-07

HERD Gamma-ray Sky Survey Sensitivity Narrow FoV � 2016-04-07

Space gravitational wave programs • Taiji program of CAS – Similar to LISA but with shorter arms: ~0.3 million kilometers, and/or join eLISA – R&D being approved • Tianqin program of Zhongshan University – Three satellites orbiting around the earth – R&D funded • China’s MOST is coordinating the national gravitational wave program 2016-04-07

Major astroparticle physics projects in China • Underground experiments: JUNO & JPUL (ongoing) • Ground-based CMB: Ali observatory (starting) • H-altitude cosmic rays/gamma-rays: LHAASO (started) • Space missions – Dark energy survey: China’s Space Station (approved ~2022) – X-/gamma-rays, cosmic rays, dark matter: DAMPE (2015), POLAR (2016), HXMT (2016), SVOM (approved 2021), HERD (R&D~2022) – Gravitational waves: Taiji and Tianqin (starting) 2016-04-07