Difference between revisions of "September 9, 2011"
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|2339||Up 2 mm||In ||Open ||Up 2 mm||No | |2339||Up 2 mm||In ||Open ||Up 2 mm||No | ||
| − | |align="left"|R(upstream) = 2648/35092 = 0.075 e+/pulse, | + | |align="left"|R(upstream) = 2648/35092 = 0.075 e+/pulse,<br>R(downstream) = 3191/35092 = 0.091 e+/pulse |
| − | R(downstream) = 3191/35092 = 0.091 e+/pulse | ||
|- | |- | ||
| − | |2341||Up 2 mm||In ||Open ||Out||No | + | |2341||Up 2 mm||In ||Open ||Out||No |
| + | |align="left"|R(upstream) = 1088/35494 = 0.031 e+/pulse,<br> R(downstream) = 1328/35494 = 0.037 e+/pulse. | ||
<span style="color:red">About 59% of photons are coming from the radiator. Bad</span> | <span style="color:red">About 59% of photons are coming from the radiator. Bad</span> | ||
|- | |- | ||
|2342||Down 2 mm||In ||Open ||Out||No | |2342||Down 2 mm||In ||Open ||Out||No | ||
| − | |align="left"|R(upstream) = 1586/36678 = 0.043 e+/pulse, | + | |align="left"|R(upstream) = 1586/36678 = 0.043 e+/pulse,<br>R(downstream) = 1888/36678 = 0.051 e+/pulse. |
| − | R(downstream) = 1888/36678 = 0.051 e+/pulse. | ||
|- | |- | ||
|2343||Down 2 mm||In ||Open ||Down 2 mm||No | |2343||Down 2 mm||In ||Open ||Down 2 mm||No | ||
| − | |align="left"|<span style="color:blue">R(upstream) = 2232/35488 = 0.063 e+/pulse. <span style="color:red">About 32% of photons are coming from the radiator. Bad</span> | + | |align="left"|<span style="color:blue">R(upstream) = 2232/35488 = 0.063 e+/pulse. |
| + | <span style="color:red">About 32% of photons are coming from the radiator. Bad</span> | ||
|- | |- | ||
| − | |2344||Centered||In ||Open ||Centered||No | + | |2344||Centered||In ||Open ||Centered||No |
| + | |align="left"|R(upstream) = 2683/35095 = 0.076 e+/pulse. | ||
|- | |- | ||
| − | |2345||Centered||In ||Open ||Out||No | + | |2345||Centered||In ||Open ||Out||No |
| + | |align="left"|R(upstream) = 1039/35094 = 0.029 e+/pulse. | ||
| + | <span style="color:red">About 62% of photons are coming from the radiator. Bad</span> | ||
|- | |- | ||
| − | |2346||Centered||In ||Open ||Out||No | + | |2346||Centered||In ||Open ||Out||No |
| + | |align="left"|R(upstream) = 1286/35885 = 0.036 e+/pulse. | ||
| + | Improved shielding around dump. | ||
|- | |- | ||
|colspan="6"| ||align="left"|<span style="color:green">Based on the previous results the beam is total crap, so beam turn up.</span> | |colspan="6"| ||align="left"|<span style="color:green">Based on the previous results the beam is total crap, so beam turn up.</span> | ||
|- | |- | ||
| − | |2349||Centered||In ||Open ||Out||No | + | |2349||Centered||In ||Open ||Out||No |
| + | |align="left"|R(upstream) = 404/35489 = 0.011 e+/pulse. | ||
|- | |- | ||
| − | |2350||Centered||In ||Open ||Out||No | + | |2350||Centered||In ||Open ||Out||No |
| + | |align="left"|R(upstream) = 428/35093 = 0.012 e+/pulse. | ||
| + | Additional shielding around the vacuum window of the beam pipe. | ||
|- | |- | ||
| − | |2351||Centered||In ||Open ||Centered||No | + | |2351||Centered||In ||Open ||Centered||No |
| + | |align="left"|R(upstream) = 1314/35094 = 0.037 e+/pulse. | ||
| + | Additional shielding around the vacuum window of the beam pipe is removed. | ||
| + | <span style="color:red">About 68% of photons are coming from the radiator. Still bad</span> | ||
|- | |- | ||
|2352||Up 2 mm||In ||Open ||Up 2 mm||D2O buttle ||align="left"|Asymmetry production run. About 40 min | |2352||Up 2 mm||In ||Open ||Up 2 mm||D2O buttle ||align="left"|Asymmetry production run. About 40 min | ||
Revision as of 19:12, 9 September 2011
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(upstream) = 2648/35092 = 0.075 e+/pulse, R(downstream) = 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 | 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 | R(upstream) = 404/35489 = 0.011 e+/pulse. |
| 2350 | Centered | In | Open | Out | No | R(upstream) = 428/35093 = 0.012 e+/pulse.
Additional shielding around the vacuum window of the beam pipe. |
| 2351 | Centered | In | Open | Centered | No | 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
Electron beam on glass
12pm upstream view screen
12pm downstream view screen
