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Thoughts on Design of New Large Underground Detectors Incorporating Track Imaging

Thoughts on Design of New Large Underground Detectors Incorporating Track Imaging. Mikhail Batygov and John Learned, University of Hawaii. Brookhaven, UDiG workshop, October 17, 2008. Moving beyond present large water Cherenkov detectors. BIGGER

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Thoughts on Design of New Large Underground Detectors Incorporating Track Imaging

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  1. Thoughts on Design of New Large Underground DetectorsIncorporating Track Imaging Mikhail Batygov and John Learned, University of Hawaii. Brookhaven, UDiG workshop, October 17, 2008

  2. Moving beyond present large water Cherenkov detectors • BIGGER • Obvious up to 1 MT, limited by the cost of PMT • Dope water for greater output and n detection • Studies underway: e.g. GADZOOKS • New generation of photodetectors • Problem with development time & funding; hybrids are probably best short term hope • Imaging • Old idea from the 80-ies by JGL and T. Ypsilantis, may be practical now

  3. Advantages of RICH • Ability to recover p and  independently • Ability to see track topology • Useful for recognizing decay mode and rejecting background • Much experience with RICH detectors at accelerators now • New information from accelerator experiments allows better background characterization of which imaging can take advantage (information from RICH becomes more useful).

  4. Image of a Track Use tomographic methods to reconstruct in focus image.

  5. Imaging • Scintillators • Easy because images seen from every location • Problem with Depth of Field • Problem with adequate light (for event energies typical of scintillator experiments – MeV ) • Studies underway at several locations, particularly at Tohoku • Cherenkov • Rays in a plane containing the track are parallel and can be focused to a point in that plane • For an imager (camera) there are several things that can be measured • R =>  • Thickness => 1/p • Crossing views give reconstruction of dE/dX, Xi, Yi, Zi, Vxi, Vyi, Vzi • Need large aperture, >~1m2

  6. Summary • In rethinking new large neutrino/pdk detectors we ought to consider new technologies. • Message from us: please consider the use of RICH-like techniques. • Existing detectors might make a good test ground: just several cameras would make terrific muon recording device. • Build small test device for Homestake? Anyone want to collaborate?

  7. Image of a Track Use tomographic methods to reconstruct in focus image.

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