1 Losses in the Cooling Channel Malcolm Ellis PID Meeting 1 st March 2005.

2 Simulation  10 simulations of a matched beam, with very narrow P Z, and transverse emittance from 0.5 – 9.5  mm rad.  Beam is started just upstream of the upstream SciFi tracker and simulated through the experiment to the downstream tracker.  Simulation of the full MICE (stage VI) cooling channel.  Material, field map, etc as described at LBNL meeting.

3 Reference Planes Upstream Tracker Downstream Tracker Cooling Channel  10 reference planes provide Monte Carlo truth information (one for each station).  Distributions of radial position of muon in Station 1 (closest to cooling channel) are compared  In next slides, upstream is red, downstream is blue.

4 0.5 and 1.5  mm rad

5 2.5 and 3.5  mm rad

6 4.5 and 5.5  mm rad

7 6.5 and 7.5  mm rad

8 8.5 and 9.5  mm rad

9 Transmission  Ratio of number of muons in downstream to upstream tracker is compared.  Transmission flat at about 99.3% at low emittance, then drops to 90% at 9.5  mm rad.