Difference between revisions of "September 13, 2011"

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R(beam down) =  n/pulse<br>
 
R(beam down) =  n/pulse<br>
 
R(upstream) =  e+/pulse<br>
 
R(upstream) =  e+/pulse<br>
<span style="color:red">About 57% of photons are coming from the radiator according to PS. Bad</span><br>
+
<span style="color:red">About % of photons are coming from the radiator according to PS. Bad</span><br>
<span style="color:red">About 92% of neutrons are coming from the radiator according to n detector down. Good</span>
+
<span style="color:red">About % of neutrons are coming from the radiator according to n detector down. Good</span>
 
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Revision as of 15:35, 13 September 2011

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summary what was been done

Run # Beam Dump magnet Collimator Radiator 10 um Al Target Comments
2385 Up 2 mm In Open Out DU plate Beam check-in run. Beam hardener off. DU plate 45/45 degree orientation and gammas hit the bottom right corner of plate from upstream view.

R(beam 45 left) = 6/173553 = 0.0000346 n/pulse
R(beam 45 right) = 0/583758 = 0.0 n/pulse
R(beam down) = 15/173553 = 0.0000864 n/pulse
R(upstream) = 1374/173553 = 0.00792 e+/pulse
Lost beam

2386 Up 2 mm In Open Up 2 mm DU plate Beam check-in run. 1" of Al hardener in front of upstream radiator.

R(beam 45 left) = n/pulse
R(beam 45 right) = n/pulse
R(beam down) = 90/79367 = 0.0011340 n/pulse
R(upstream) = 1058/57841 = 0.01829 e+/pulse
About 57% of photons are coming from the radiator according to PS. Bad
About 92% of neutrons are coming from the radiator according to n detector down. Good

2387 Up 2 mm In Open Up 2 mm DU plate Lost beam
2387 Up 2 mm In Open Up 2 mm DU plate Beam check-in run. Hardener in as before. Target realignment, now the gammas hit the center of DU plate, which is as before 45/45 degree orientation

R(beam 45 left) = n/pulse
R(beam 45 right) = n/pulse
R(beam down) = n/pulse
R(upstream) = e+/pulse
About % of photons are coming from the radiator according to PS. Bad
About % of neutrons are coming from the radiator according to n detector down. Good