Difference between revisions of "September 13, 2011"

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<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 92% of neutrons are coming from the radiator according to n detector down. Good</span>
 
|-
 
|-
−
|2387||Up 2 mm||In ||Open ||No ||Up 2 mm||DU plate  
+
|2387||Up 2 mm||In ||Open ||1" Al upstream collim ||Up 2 mm||DU plate  
 
|align="left"|<span style="color:red">Lost beam</span>
 
|align="left"|<span style="color:red">Lost beam</span>
 
|-
 
|-
−
|2388||Up 2 mm||In ||Open ||No ||Up 2 mm||DU plate  
+
|2388||Up 2 mm||In ||Open ||1" Al upstream collim ||Up 2 mm||DU plate  
−
|align="left"|Beam check-in run. 1" Al Hardener in as before. Target realignment, now the gammas hit the center of DU plate, which is as before 45/45 degree orientation
+
|align="left"|Beam check-in run. 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 <br>
 
R(beam 45 left) =  n/pulse <br>
 
R(beam 45 right) =  n/pulse<br>
 
R(beam 45 right) =  n/pulse<br>
Line 41: Line 41:
 
<span style="color:red">About % 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>
 
|-
 
|-
−
|2389-2395||Up 2 mm||In ||Open ||No ||Up 2 mm||DU plate  
+
|2389-2395||Up 2 mm||In ||Open ||1" Al upstream collim ||Up 2 mm||DU plate  
 
|align="left"|Detectors set-up. Two of them are non-working.
 
|align="left"|Detectors set-up. Two of them are non-working.
 
|-
 
|-
−
|2396||Up 2 mm||In ||Open ||Up 2 mm||DU plate  
+
|2396||Up 2 mm||In ||Open ||1" Al upstream collim ||Up 2 mm||DU plate  
 
|align="left"|HV on A22 and A24 are -1700V. Detector check run. All setup as before. Radiator in/out test
 
|align="left"|HV on A22 and A24 are -1700V. Detector check run. All setup as before. Radiator in/out test
 
R(beam 45 left) =  104/216929 = 0.000479 n/pulse <br>
 
R(beam 45 left) =  104/216929 = 0.000479 n/pulse <br>
Line 51: Line 51:
 
R(upstream) =  4787/216929 = 0.02207 e+/pulse<br>
 
R(upstream) =  4787/216929 = 0.02207 e+/pulse<br>
 
|-
 
|-
−
|2397||Up 2 mm||In ||Open ||No ||Out||DU plate  
+
|2397||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate  
 
|align="left"|Radiator in/out test
 
|align="left"|Radiator in/out test
 
R(beam 45 left) = 9/200289 = 0.0000449 n/pulse <br>
 
R(beam 45 left) = 9/200289 = 0.0000449 n/pulse <br>
Line 59: Line 59:
 
<span style="color:red">About 75% of photons are coming from the radiator according to PS</span><br>
 
<span style="color:red">About 75% of photons are coming from the radiator according to PS</span><br>
 
|-
 
|-
−
|2398||Down 2 mm||In ||Open ||No ||Down 2 mm||DU plate  
+
|2398||Down 2 mm||In ||Open ||1" Al upstream collim ||Down 2 mm||DU plate  
 
|align="left"|Radiator in/out test
 
|align="left"|Radiator in/out test
 
R(beam 45 left) =  n/pulse <br>
 
R(beam 45 left) =  n/pulse <br>
Line 66: Line 66:
 
R(upstream) =  e+/pulse<br>
 
R(upstream) =  e+/pulse<br>
 
|-
 
|-
−
|2399||Down 2 mm||In ||Open ||No ||Out||DU plate  
+
|2399||Down 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate  
 
|align="left"|Radiator in/out test
 
|align="left"|Radiator in/out test
 
R(beam 45 left) =  n/pulse <br>
 
R(beam 45 left) =  n/pulse <br>
Line 74: Line 74:
 
<span style="color:red">About % of photons are coming from the radiator according to PS.</span><br>
 
<span style="color:red">About % of photons are coming from the radiator according to PS.</span><br>
 
|-
 
|-
−
|2400||Up 2 mm||In ||Open ||No ||Out||No
+
|2400||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||No
 
|align="left"|
 
|align="left"|
 
|-
 
|-
−
|2401||Up 2 mm||In ||Open ||No ||Out||DU plate
+
|2401||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate
 
|align="left"|
 
|align="left"|
 
|-
 
|-
−
|2402||Up 2 mm||In ||Open ||No ||Out||DU plate
+
|2402||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate
 
|align="left"|
 
|align="left"|
 
|-
 
|-
−
|2402||Up 2 mm||In ||Open ||No ||Up 2 mm||DU plate
+
|2402||Up 2 mm||In ||Open ||1" Al upstream collim ||Up 2 mm||DU plate
 
|align="left"|Oleksiy moved radiator in
 
|align="left"|Oleksiy moved radiator in
 
|-
 
|-
−
|2403||Up 2 mm||In ||Open ||No ||Up 2 mm||DU plate
+
|2403||Up 2 mm||In ||Open ||1" Al upstream collim ||Up 2 mm||DU plate
 
|align="left"|Jason moved radiator in. Same results.
 
|align="left"|Jason moved radiator in. Same results.
 
|-
 
|-
−
|2404||Center||In ||Open ||No ||In||DU plate
+
|2404||Center||In ||Open ||1" Al upstream collim ||In||DU plate
 
|align="left"|
 
|align="left"|
 
|-
 
|-
−
|2405||Center||In ||Open ||No ||In||DU plate
+
|2405||Center||In ||Open ||1" Al upstream collim ||In||DU plate
 
|align="left"|DU plate was repositioned. Now beam should hit small part of the target corner.
 
|align="left"|DU plate was repositioned. Now beam should hit small part of the target corner.
 
|-
 
|-
−
|2406||Center||In ||Open ||No ||In||DU plate
+
|2406||Center||In ||Open ||1" Al upstream collim ||In||DU plate
 
|align="left"|Same as 2405
 
|align="left"|Same as 2405
 
|-
 
|-
−
|2407||Up 2 mm||In ||Open ||No ||Out||DU plate
+
|2407||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate
 
|align="left"|Additional shielding added around the core part of the beam pipe (downstream the radiator)
 
|align="left"|Additional shielding added around the core part of the beam pipe (downstream the radiator)
 
|-
 
|-
−
|2408||Up 2 mm||In ||Open ||No ||Out||DU plate
+
|2408||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate
 
|align="left"|Same as 2407 but additional shielding removed to improve background countime rate
 
|align="left"|Same as 2407 but additional shielding removed to improve background countime rate
 
|-
 
|-
−
|2409||Up 2 mm||In ||Open ||No ||2 mm up||DU plate
+
|2409||Up 2 mm||In ||Open ||1" Al upstream collim ||2 mm up||DU plate
 
|align="left"|
 
|align="left"|
 
|-
 
|-
−
|2410||Up 2 mm||In ||Open ||No ||2 mm up||DU plate
+
|2410||Up 2 mm||In ||Open ||1" Al upstream collim ||2 mm up||DU plate
 
|align="left"|Beam tuned up a bit, new camera was installed
 
|align="left"|Beam tuned up a bit, new camera was installed
 
|-
 
|-
−
|2411||Up 2 mm||In ||Open ||No ||Out||DU plate
+
|2411||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate
 
|align="left"|
 
|align="left"|
 
|-
 
|-
−
|2412||Up 2 mm||In ||Open ||No ||Out||DU plate
+
|2412||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate
 
|align="left"| Put additional shielding around conical part of the beam pipe.
 
|align="left"| Put additional shielding around conical part of the beam pipe.
 
|-
 
|-
−
|2413||Up 2 mm||In ||Open ||No ||Out||DU plate
+
|2413||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate
 
|align="left"| same as 2412. slits @ 300
 
|align="left"| same as 2412. slits @ 300
 
|-
 
|-
−
|2414||Up 2 mm||In ||Open ||No ||Out||DU plate
+
|2414||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate
 
|align="left"| same as 2412. slits @ 200
 
|align="left"| same as 2412. slits @ 200
 
|-
 
|-
−
|2415||Up 2 mm||In ||Open ||No ||Out||DU plate
+
|2415||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate
 
|align="left"| same as 2412. slits @ 100
 
|align="left"| same as 2412. slits @ 100
 
|-
 
|-
−
|2416||Up 2 mm||In ||Open ||No ||Out||DU plate
+
|2416||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate
 
|align="left"| same as 2412. slits @ 60
 
|align="left"| same as 2412. slits @ 60
 
|-
 
|-
−
|2417||Up 2 mm||In ||Open ||No ||Out||DU plate
+
|2417||Up 2 mm||In ||Open ||1" Al upstream collim ||Out||DU plate
 
|align="left"| same as 2412. slits @ 60. Anode voltage is lowered from 3.9 to 3.0 arb. units
 
|align="left"| same as 2412. slits @ 60. Anode voltage is lowered from 3.9 to 3.0 arb. units
 
|-
 
|-
  
 
|}
 
|}

Revision as of 23:24, 13 September 2011

go back

summary what was been done

Run # Beam Dump magnet Collimator Hardener Radiator 10 um Al Target Comments
2385 Up 2 mm In Open No 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 1" Al upstream collim 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 1" Al upstream collim Up 2 mm DU plate Lost beam
2388 Up 2 mm In Open 1" Al upstream collim Up 2 mm DU plate Beam check-in run. 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

2389-2395 Up 2 mm In Open 1" Al upstream collim Up 2 mm DU plate Detectors set-up. Two of them are non-working.
2396 Up 2 mm In Open 1" Al upstream collim Up 2 mm DU plate HV on A22 and A24 are -1700V. Detector check run. All setup as before. Radiator in/out test

R(beam 45 left) = 104/216929 = 0.000479 n/pulse
R(beam 45 right) = 62/216929 = 0.000286 n/pulse
R(beam down) = 300/216929 = 0.001383 n/pulse
R(upstream) = 4787/216929 = 0.02207 e+/pulse

2397 Up 2 mm In Open 1" Al upstream collim Out DU plate Radiator in/out test

R(beam 45 left) = 9/200289 = 0.0000449 n/pulse
R(beam 45 right) = 8/200289 = 0.0000399 n/pulse
R(beam down) = 19/200289 = 0.0000949 n/pulse
R(upstream) = 1113/200289 = 0.00556 e+/pulse
About 75% of photons are coming from the radiator according to PS

2398 Down 2 mm In Open 1" Al upstream collim Down 2 mm DU plate Radiator in/out test

R(beam 45 left) = n/pulse
R(beam 45 right) = n/pulse
R(beam down) = n/pulse
R(upstream) = e+/pulse

2399 Down 2 mm In Open 1" Al upstream collim Out DU plate Radiator in/out test

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.

2400 Up 2 mm In Open 1" Al upstream collim Out No
2401 Up 2 mm In Open 1" Al upstream collim Out DU plate
2402 Up 2 mm In Open 1" Al upstream collim Out DU plate
2402 Up 2 mm In Open 1" Al upstream collim Up 2 mm DU plate Oleksiy moved radiator in
2403 Up 2 mm In Open 1" Al upstream collim Up 2 mm DU plate Jason moved radiator in. Same results.
2404 Center In Open 1" Al upstream collim In DU plate
2405 Center In Open 1" Al upstream collim In DU plate DU plate was repositioned. Now beam should hit small part of the target corner.
2406 Center In Open 1" Al upstream collim In DU plate Same as 2405
2407 Up 2 mm In Open 1" Al upstream collim Out DU plate Additional shielding added around the core part of the beam pipe (downstream the radiator)
2408 Up 2 mm In Open 1" Al upstream collim Out DU plate Same as 2407 but additional shielding removed to improve background countime rate
2409 Up 2 mm In Open 1" Al upstream collim 2 mm up DU plate
2410 Up 2 mm In Open 1" Al upstream collim 2 mm up DU plate Beam tuned up a bit, new camera was installed
2411 Up 2 mm In Open 1" Al upstream collim Out DU plate
2412 Up 2 mm In Open 1" Al upstream collim Out DU plate Put additional shielding around conical part of the beam pipe.
2413 Up 2 mm In Open 1" Al upstream collim Out DU plate same as 2412. slits @ 300
2414 Up 2 mm In Open 1" Al upstream collim Out DU plate same as 2412. slits @ 200
2415 Up 2 mm In Open 1" Al upstream collim Out DU plate same as 2412. slits @ 100
2416 Up 2 mm In Open 1" Al upstream collim Out DU plate same as 2412. slits @ 60
2417 Up 2 mm In Open 1" Al upstream collim Out DU plate same as 2412. slits @ 60. Anode voltage is lowered from 3.9 to 3.0 arb. units
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