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Another Conceptional Design of Veto

This design proposes a veto detector system for the Daya Bay Phone Meeting, featuring a water buffer Cherenkov detector, muon tracker with RPC and plastic scintillator, LS, and a Cherenkov tank water tank. The design includes photo-electron measurement, water isolation, and passive shielding.

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Another Conceptional Design of Veto

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  1. Another Conceptional Design of Veto Daya Bay Phone Meeting Changgen Yang 2006/03/01

  2. Veto Detectors • Water Buffer Cherenkov Detector • Muon tracker: • RPC; • Plastic Scintillator; • LS; • Cherenkov Tank

  3. Water tank, a real example

  4. Photo-electron measurement

  5. 20cm of water above the top of central detector to isolate the radon background (central detector -20cm below “level –1”) y tank ;1 PMT on each end;Size: 1x1x15m^3 Access to the central detector 3 layers of RPC/Scint. to guarantee high eff. Level 0 2m water container; passive shield Level -1 z x tank ; 1 PMT on each end; Size: 1x1x15m^3 x 15m

  6. Comments • Same technology, water Cerenkov detection, are used as water buffer Cherenkov detector and water tank detector (tracker); • The water are connected so that no environmental effect; • 200MeV/m energy deposition for muon while the background energy is normally less than 2.5MeV; but not good spatial resolution; • Access to do calibration is now easier, but on the other hand, the deployment of the top shielding and detectors getting harder when swapping central detectors.

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