Difference between revisions of "September 9, 2011"

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|2339||Up 2 mm||In ||Open ||Up 2 mm||No ||align="left"|'''R(upstr) = 2648/35092 = 0.075 e+/pulse''',<math>/newline</math> '''R(downstr) = 3191/35092 = 0.091 e+/pulse'''
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|2339||Up 2 mm||In ||Open ||Up 2 mm||No ||align="left"|'''R(upstr) = 2648/35092 = 0.075 e+/pulse''',<math>\newline</math> '''R(downstr) = 3191/35092 = 0.091 e+/pulse'''
 
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|2341||Up 2 mm||In ||Open ||Out||No ||align="left"|<span style="color:blue">R(upstream) = 1088/35494 = 0.031 e+/pulse, R(downstream) = 1328/35494 = 0.037 e+/pulse.</span> <span style="color:red">About 59% of photons are coming from the radiator. Bad</span>
 
|2341||Up 2 mm||In ||Open ||Out||No ||align="left"|<span style="color:blue">R(upstream) = 1088/35494 = 0.031 e+/pulse, R(downstream) = 1328/35494 = 0.037 e+/pulse.</span> <span style="color:red">About 59% of photons are coming from the radiator. Bad</span>

Revision as of 19:00, 9 September 2011

go back

summary what was been done

Run # Beam Dump magnet Collimator Radiator 10 um Al Target Comments
2339 Up 2 mm In Open Up 2 mm No R(upstr) = 2648/35092 = 0.075 e+/pulse,[math]\newline[/math] R(downstr) = 3191/35092 = 0.091 e+/pulse
2341 Up 2 mm In Open Out No R(upstream) = 1088/35494 = 0.031 e+/pulse, R(downstream) = 1328/35494 = 0.037 e+/pulse. About 59% of photons are coming from the radiator. Bad
2342 Down 2 mm In Open Out No R(upstream) = 1586/36678 = 0.043 e+/pulse, R(downstream) = 1888/36678 = 0.051 e+/pulse.
2343 Down 2 mm In Open Down 2 mm No R(upstream) = 2232/35488 = 0.063 e+/pulse. About 32% of photons are coming from the radiator. Bad
2344 Centered In Open Centered No R(upstream) = 2683/35095 = 0.076 e+/pulse.
2345 Centered In Open Out No R(upstream) = 1039/35094 = 0.029 e+/pulse. About 62% of photons are coming from the radiator. Bad
2346 Centered In Open Out No PS Rate is: R(upstream) = 1286/35885 = 0.036 e+/pulse. Improved shielding around dump.
Based on the previous results the beam is total crap, so beam turn up.
2349 Centered In Open Out No PS Rate is: R(upstream) = 404/35489 = 0.011 e+/pulse.
2350 Centered In Open Out No PS Rate is: R(upstream) = 428/35093 = 0.012 e+/pulse. Additional shielding around the vacuum window of the beam pipe.
2351 Centered In Open Centered No PS Rate is: R(upstream) = 1314/35094 = 0.037 e+/pulse. Additional shielding around the vacuum window of the beam pipe is removed. About 68% of photons are coming from the radiator. Still bad
2352 Up 2 mm In Open Up 2 mm D2O buttle Asymmetry production run. About 40 min
2353 Up 2 mm In Open Out D2O buttle plan About 30 min.

Beam Realignment

Screen shot using Phosphorous screen

9 9 11 10am.jpg

Electron beam on glass

E-glass.jpg

12pm upstream view screen

12pm upstream.jpg

12pm downstream view screen

12pm downstream.jpg