1. DAMPE: now in orbit G. Ambrosi – DAMPE coll.

2. DAMPE: now in orbit G. Ambrosi – DAMPE coll.

3. DAMPE: One of the Five Approved Satellite Missions of the Chinese Academy of Sciences (CAS) Hard X-ray Modulation Telescope (HXMT) Quantum Science Experimental Satellite DArk Mater Particle Explorer (DAMPE) Retrievable Scientific Experimental Satellite Kuafu Space Weather Project (3 satellite) 3

4. Science, 20 May 2011 Dark Matter Particle Explorer Satellite Strategic Priority Research Program in Space Science 4

5. Scientific Objectives of DAMPE High energy particle detection in space – Search for Dark Matter signatures with e,  – Study of cosmic ray spectrum and composition – High energy gamma ray astronomy Detection of 5 GeV - 10 TeV e/ , 100 GeV - 100 TeV CR Excellent energy resolution and tracking precision Complementary to Fermi, AMS-02, CALET, CREAM, … Follow-up mission to both Fermi/LAT and AMS-02 – Extend the energy reach to the TeV region, providing better resolution – Overlap with Fermi on gamma ray astronomy – Run in parallel for some time 5

6. MOU signed on April 30 th 2013 CAS (China), Geneva Uni (Switzerland), INFN (Italy) 6

7. The DAMPE Collaboration China – Purple Mountain Observatory, CAS, Nanjing Chief Scientist: Prof. Jin Chang – Institute of High Energy Physics, CAS, Beijing – National Space Science Center, CAS, Beijing – University of Science and Technology of China, Hefei – Institute of Modern Physics, CAS, Lanzhou Switzerland – University of Geneva Italy – INFN and University of Perugia – INFN and University of Bari – INFN and University of Lecce 7

8. DAMPE Satellite Planned launch: December 18 th 2015 – Total weight ~1900 kg, power consumption ~640 W Scientific payload ~1300 kg, ~400 W – Lifetime > 3 year Altitude: 500 km Inclination: 97.4065° Period: 95 minutes Orbit: sun-synchronous 8

9. DAMPE in space, launch base Beijing Jiuquan Satellite Launch Center 9

10. DAMPE in space, il lancio

11. 2015 年 12 月 17 日 8 时 12 分 11

12. Scientific Objectives of DAMPE High energy particle detection in space – Search for Dark Matter signatures with e,  – Study of cosmic ray spectrum and composition – High energy gamma ray astronomy Detection of 5 GeV - 10 TeV e/ , 100 GeV - 100 TeV CR Excellent energy resolution and tracking precision Complementary to Fermi, AMS-02, CALET, ISS-CREAM, … Follow-up mission to both Fermi/LAT and AMS-02 – Extend the energy reach to the TeV region, providing better resolution – Overlap with Fermi on gamma ray astronomy – Run in parallel for some time 12

13. PSD PSD: double layer of scintillating strip detector acting as ACD STK STK: 6 tracking double layer + 3 mm tungsten plates. Used for particle track and photon conversion BGO BGO: the calorimeter made of 308 BGO bars in hodoscopic arrangement (~31 radiation length). Performs both energy measurements and trigger NUD NUD: it’s complementary to the BGO by measuring the thermal neutron shower activity. Made up of boron-doped plastic scintillator The DAMPE Detector  CR 13

14. The DAMPE Detector W converter (1.43 X 0 ) + thick calorimeter (31 X 0 ) + precise tracking + charge measurement ➠ high energy  -ray, electron and CR telescope PSD STK BGO NUD 14

15. FM final integration (06/2015) PSD STK BGO 15

16. The DAMPE Detector Mass: 1400 Kg Power: ~ 400 W Data: 12 Gbyte/day Liftime: 5 years 16

17. Comparison with AMS-02 and Fermi DAMPEAMS-02Fermi LAT e/  Energy res.@100 GeV (%) 1.5310 e/  Angular res.@100 GeV (°) 0.10.30.1 e/p discrimination10 5 10 5 - 10 6 10 3 Calorimeter thickness (X 0 )31178.6 Geometrical accep. (m 2 sr)0.290.091 Geometrical acceptance with BGO alone: 0.36 m 2 sr – BGO+STK+PSD: 0.29 m 2 sr – First 10 layers of BGO (22 X 0 ) +STK+PSD: 0.36 m 2 sr 17

18. Exposure ( assuming GF=0.3m 2 sr ) DAMPE CALET CREAM 18

19. p, He, Nuclei C to Fe DAMPE in 3 years 19

20. electrons DAMPE in 3 years 20

21. Flight integration (06/2015) 21

22. Si Ladder and Layer 192 ladders 768 silicon sensors 1152 ASICs 73728 channels 12 layers, 6-x and 6-y 76 cm 38 cm 22

23. the Dampe Silicon Tracker April 10 th 2015 DPNC clean room 23

24. the Silicon Tracker April 10 th 2015 24

25. BGO Calorimeter (BGO) 14-layer BGO hodoscope, 7 x-layers + 7 y-layers – BGO bar 2.5cm×2.5cm, 60cm long, readout both ends with PMT Use 3 dynode (2, 5, 8) signals to extend the dynamic range – Charge readout: VA160 with dynamic range up to 12 pC – Trigger readout: VATA160 to generate hit signal above threshold Detection area 60cm×60cm Total thickness 31X 0 PMO, USTC Measure electron/photon energy with great precision between 5 GeV - 10 TeV 25

26. Calorimeter assembly Carbon Fiber Structure BGO crystal installation PMT installation Cableing Cable connectorBGO Calorimeter 26

27. DAMPE first flight: EQM beam test 2015 27

28. Beam Test 28

29. 29 STK resolution after alignment

30. Electron Energy and Angle Reconstruction (linearity and resolutions ) 30 PRELIMINARY

31. 2015 年 12 月 17 日 8 时 12 分 Dec. 24 2015: HV ON 31

32. Dec. 24 First Light of DAMPE 328GeV electron 32

33. 12GeV Proton 33

34. electron gamma-ray Proton 34

35. electron gamma-ray Proton 35

36. Data size:16GB/day Onboard  100GB/day on ground, about 400 M events Trigger rate in orbit 36

37. Noise of the bulk significantly lower than on-ground, ~0.3 difference in noise leads to ~1ADC difference in 3.5 sigma high threshold – High threshold table will be updated Noise comparison: Jan. 31 vs on-ground 98 channels (0.13%) noise > 10 303 channels (0.41%) noise > 5 37

38. STK occupancy 38

39. STK signal on all ladders 39

40. Direction Measurement BGO vs STK 40

41. 7 years FERMI 55 days DAMPE exposure

42. Conclusions The DAMPE detector was successfully launched on December 17 th 2015 The commissioning period of two months is completed Detector monitoring show excellent performance in orbit Understanding and optimizing the detector performance is currently the main task of the Collaboration 42 Stay tuned for physics results!