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28 April 2005Ckov1 Update -- S. Kahn1 Update to the Upstream Cherenkov  -  Separation Steve Kahn Brookhaven National Lab May 2, 2005 Detector Tele-Meeting.

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Presentation on theme: "28 April 2005Ckov1 Update -- S. Kahn1 Update to the Upstream Cherenkov  -  Separation Steve Kahn Brookhaven National Lab May 2, 2005 Detector Tele-Meeting."— Presentation transcript:

1 28 April 2005Ckov1 Update -- S. Kahn1 Update to the Upstream Cherenkov  -  Separation Steve Kahn Brookhaven National Lab May 2, 2005 Detector Tele-Meeting

2 28 April 2005Ckov1 Update -- S. Kahn2 Simulation Running Conditions Using a 10 cm C 6 F 14 radiator for these calculations: Produces more  c (and PE) by a factor of 5. A traversing muon loses ~26 MeV in energy in radiator. A thicker radiator should not affect the  thresholds so we should not a priori improve the separation (other than having enough light) The beam contamination has the same momentum distribution as the muons. The relative number of PE from  and  now have meaning. The initial sample has 50%  and 50% . Samples with mono-chromatic momentum are run 180, 200, 220, 240, 260 MeV/c samples.

3 28 April 2005Ckov1 Update -- S. Kahn3 180 MeV/c:  c Generated by Traversing 

4 28 April 2005Ckov1 Update -- S. Kahn4 200 MeV/c:  c Generated by Traversing 

5 28 April 2005Ckov1 Update -- S. Kahn5 220 MeV/c:  c Generated by Traversing 

6 28 April 2005Ckov1 Update -- S. Kahn6 240 MeV/c:  c Generated by Traversing 

7 28 April 2005Ckov1 Update -- S. Kahn7 260 MeV/c:  c Generated by Traversing 

8 28 April 2005Ckov1 Update -- S. Kahn8 180 MeV/c: PE Seen in PMTs from 

9 28 April 2005Ckov1 Update -- S. Kahn9 200 MeV/c: PE Seen in PMTs from 

10 28 April 2005Ckov1 Update -- S. Kahn10 220 MeV/c: PE Seen in PMTs from 

11 28 April 2005Ckov1 Update -- S. Kahn11 240 MeV/c: PE Seen in PMTs from 

12 28 April 2005Ckov1 Update -- S. Kahn12 260 MeV/c: PE Seen in PMTs from 

13 28 April 2005Ckov1 Update -- S. Kahn13 Separatibility of pions from muons. Defining the overlap of the distributions of the number of PE seen from a muon and pion traversing the radiator as below we see that we can reasonably separate pions from muons up to about 240 MeV/c.

14 28 April 2005Ckov1 Update -- S. Kahn14 Cone Sizes P cc tan  c sin 2  c 1800.86240321.93º0.4026060.139483 2000.88419725.2069º0.4707110.181381 2200.90143027.44184º0.5192780.212381 2400.91523329.06202º0.5557250.235959 2600.92642530.28422º0.5839830.254308


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