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The JinPing Underground Laboratory in China and The Panda-X Dark Matter Detector

The JinPing Underground Laboratory in China and The Panda-X Dark Matter Detector. Karl Ludwig Giboni Shanghai Jiao Tong University. TPC Workshop, Paris 17-20 December, 2012. Location of the JinPing Underground Lab. Mountainous area about 80 km (2 h ) from Xichang. The JinPing Lab.

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The JinPing Underground Laboratory in China and The Panda-X Dark Matter Detector

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  1. The JinPing Underground Laboratory in China and The Panda-X Dark Matter Detector Karl Ludwig Giboni Shanghai Jiao Tong University TPC Workshop, Paris 17-20 December, 2012

  2. Location of the JinPing Underground Lab Mountainous area about 80 km (2 h ) from Xichang

  3. The JinPing Lab Newly constructed deep underground lab In the south of China, Sichuan Province Now available for installation of detectors

  4. 2500 m of rock overburden About 7500 m.w.e. The Muon Background 25 – 50 Muons per year Muon veto unnecessary Surrounding Rock is low radioactivity 7.5 10-10 JinPing Lab A popular graph extended in scale!

  5. Power station and Tunnels still Under Construction Infrastructure of the Lab: Some existing already, some still missing But, it is getting better every day.

  6. Initial Excavation Rapid progress from raw excavation

  7. To a finished lab ( 40 m long, 7 m wide, 6.5 m high)

  8. The Laboratory Presently 2 Experiments: CDEX Panda-X Plus Counting stations A second one to be added in the next months) Start of Panda-X Construction

  9. The Panda Site Panda-X Area after Installation of the Shield

  10. Installation of PE-Pb-PE shield in April

  11. The Detector Large outside vessel with 5 cm copper walls Inner vessel initially stainless steel, later TBD Dual phase liquid xenon TPC 25 kg after 5 cm fiducial cut Easily expamdable

  12. Stage Ia detector 25 kg fiducial volume after a 5 cm all around cut

  13. Expandable Detector Stage Ia Stage Ib Easy evolution from 25 kg to 300 kg

  14. TPC Design

  15. Krypton Removal Krypton Distillation Column build at SJTU (10 SLPM)

  16. Cryogenic System for Panda-X Cryogenic System for Panda-X tested and installed Underground

  17. Test System in Shanghai Small system at SJTU for testing specific aspects of new detector structures Mostly operated by students Excellent training facility System commercially available

  18. Summary JPUL is a new underground laboratory in Sichuan province, China Very deep, 7500 m.w.e. Lab might be expanded to 10000 m2 in the future Panda – X new Liquid Xenon TPC for Dark Matter search Initially 25 kg but expandable Underground installation completed Systems are under test First (preliminary) data taking starts very early next year

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