Difference between revisions of "September 9, 2011"

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[https://wiki.iac.isu.edu/index.php/Sept_PhotFisRun_44MeV_2011#Log_eBook go back]
 
[https://wiki.iac.isu.edu/index.php/Sept_PhotFisRun_44MeV_2011#Log_eBook go back]
  
−
 
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==summary what was been done==
  
 
{| border="1" cellspacing="0" style="text-align: center; width: 1000px "
 
{| border="1" cellspacing="0" style="text-align: center; width: 1000px "
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! scope="col" width="40" | Run #
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! scope="col" width="8%" | Run #
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! scope="col" width="40" | Beam
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! scope="col" width="8%" | Beam
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! scope="col" width="40" | Dump magnet
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! scope="col" width="8%" | Dump magnet
−
! scope="col" width="40" | Collimator
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! scope="col" width="8%" | Collimator
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! scope="col" width="40" | Radiator
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! scope="col" width="8%" | Radiator 10 um Al
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! scope="col" width="40" | Target
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! scope="col" width="8%" | Target
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! scope="col" width="500" | Comments
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! scope="col" width="60%" | Comments
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|-
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|2339||Up 2 mm||In ||Open ||Up 2 mm||No
 +
|align="left"|R(upstream) = 2648/35092 = 0.075 e+/pulse,<br>R(downstream) = 3191/35092 = 0.091 e+/pulse
 +
|-
 +
|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>
 +
|-
 +
|2342||Down 2 mm||In ||Open ||Out||No
 +
|align="left"|R(upstream) = 1586/36678 = 0.043 e+/pulse,<br>R(downstream) = 1888/36678 = 0.051 e+/pulse.
 
|-
 
|-
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|2339||Up 2 mm||In ||Open ||Up 2 mm||No ||align="left"|PS Rate is: R(upstream) = 2648/35092 = 0.075 e^+/pulse, R(downstream) = 3191/35092 = 0.091 e+/pulse
+
|2343||Down 2 mm||In ||Open ||Down 2 mm||No  
 +
|align="left"|R(upstream) = 2232/35488 = 0.063 e+/pulse.
 +
<span style="color:red">About 32% of photons are coming from the radiator. Bad</span>
 
|-
 
|-
−
|2341||Up 2 mm||In ||Open ||Out||No ||align="left"|PS Rate is: R(upstream) = 1088/35494 = 0.031 e+/pulse, R(downstream) = 1328/35494 = 0.037 e+/pulse
+
|2344||Centered||In ||Open ||Centered||No  
 +
|align="left"|R(upstream) = 2683/35095 = 0.076 e+/pulse.
 
|-
 
|-
−
|2342||Down 2 mm||In ||Open ||Out||No ||align="left"|PS Rate is: R(upstream) = 1586/36678 = 0.043 e+/pulse, R(downstream) = 1888/36678 = 0.051 e+/pulse
+
|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>
 
|-
 
|-
−
|2343||Down 2 mm||In ||Open ||Down 2 mm||No ||align="left"|PS Rate is: R(upstream) = 2232/35488 = 0.063 e+/pulse
+
|2346||Centered||In ||Open ||Out||No  
 +
|align="left"|R(upstream) = 1286/35885 = 0.036 e+/pulse.
 +
Improved shielding around dump.
 
|-
 
|-
−
|2344||Centered||In ||Open ||Centered||No ||align="left"|PS Rate is: R(upstream) =  2683/35095 = 0.076 e+/pulse
+
|colspan="6"| ||align="left"|<span style="color:green">Based on the previous results the beam is total crap, so beam tuned up.</span>
 
|-
 
|-
−
|2344||Centered||In ||Open ||Out||No ||align="left"|PS Rate is: R(upstream) = 2683/35095 = 0.076 e+/pulse
+
|2349||Centered||In ||Open ||Out||No  
 +
|align="left"|R(upstream) =  404/35489 = 0.011 e+/pulse.
 +
|-
 +
|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
 +
|align="left"|R(upstream) =  1314/35094 = 0.037 e+/pulse.
 +
<span style="color:red">About 68% of photons are coming from the radiator. Still bad.</span>
 +
Additional shielding around the vacuum window of the beam pipe is removed.
 +
|-
 +
|2352||Up 2 mm||In ||Open ||Up 2 mm||D2O bottle ||align="left"|Production run.
 +
|-
 +
|2353||Up 2 mm||In ||Open ||Out||D2O bottle ||align="left"|background check<br>
 +
threshold @A22 lowered to -100 mV
 +
|-
 +
|2354||Up 2 mm||In ||Open ||Up 2 mm||DU plate
 +
|align="left"|R(upstream) = 4228/188008 = 0.022 e+/pulse,<br>R(downstream) = 5169/188008 = 0.027 e+/pulse
 +
Production run.
 +
|-
 +
|2355||Up 2 mm||In ||Open ||Out ||DU plate
 +
|align="left"|R(upstream) = 766/44747 = 0.017 e+/pulse,<br>R(downstream) = 962/44747 = 0.021 e+/pulse
 +
<span style="color:red">background check: about the same as w/ radiator in. Bad.</span><br> Threshold @A20 lowered to -100 mV
 
|-
 
|-
 
|}
 
|}
 +
 +
== Beam Realignment ==
 +
Screen shot using Phosphorous screen
 +
 +
[[File:9_9_11_10am.jpg | 500px]]
 +
 +
Electron beam on glass
 +
 +
[[File:e-glass.jpg | 500px]]
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12pm upstream view screen
 +
 +
[[File:12pm_upstream.jpg | 500px]]
 +
 +
12pm downstream view screen
 +
 +
[[File:12pm_downstream.jpg | 500px]]
 +
 +
 +
 +
 +
[https://wiki.iac.isu.edu/index.php/September_9,_2011 go up]

Latest revision as of 16:57, 16 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(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 tuned 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.

About 68% of photons are coming from the radiator. Still bad. Additional shielding around the vacuum window of the beam pipe is removed.

2352 Up 2 mm In Open Up 2 mm D2O bottle Production run.
2353 Up 2 mm In Open Out D2O bottle background check

threshold @A22 lowered to -100 mV

2354 Up 2 mm In Open Up 2 mm DU plate R(upstream) = 4228/188008 = 0.022 e+/pulse,
R(downstream) = 5169/188008 = 0.027 e+/pulse

Production run.

2355 Up 2 mm In Open Out DU plate R(upstream) = 766/44747 = 0.017 e+/pulse,
R(downstream) = 962/44747 = 0.021 e+/pulse

background check: about the same as w/ radiator in. Bad.
Threshold @A20 lowered to -100 mV

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



go up

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