1. Discussion on cosmogenic taggers With some thinking by : M.Weber, F.Pietropaolo, A.Guglielmi, M.Ne.

3. Drift time 1.6 ms Detector length =18m Expected images in ICARUS T600 at FNAL (on surface) ICARUS presentation at FNAL April 30, 2014 + low energy CNGS beam eventsCosmic rays

4. Drift time 1.6 ms Detector length =18m ICARUS presentation at FNAL April 30, 2014 Cosmic rays+ low energy CNGS beam events Expected images in ICARUS T600 at FNAL (on surface)

5. Requirements How to define requirements -Base them on cosmic muons -Also beam dirt events ?

6. geometry (solid angle?)  top  bottom ?  side (partially, full?) Distance to TPC active volume ? In the LAr with pads ? As far as outside the overburden ? Granularity (dx,dy,dz)? Space resolution of 20 x 20 cm2 at the TPC active volume? Telescope vs. single space point ? Pointing vectors ? 2 layers ? distance ? Remember average angle ~40 o Timing performance (~ 100 ns enough?) Requirements

7. Technology -Scintillator pads -RPCs -LAr internal pads -….. Part of the trigger ? Coincidence between light and mu-pad ?

8. Rates estimations for all 3 detectors Simulation effort (how? Where?) Should this become a common and global approach ? What next ?