Difference between revisions of "CHIPS IAC Run 5-29-08"

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Tune 10 Mev onto Tungsten and 4 MeV into Cell
 
Tune 10 Mev onto Tungsten and 4 MeV into Cell
  
We put in two thin pieces (thickness ~1/4") of lead angled at ~30 degrees between the NaI detector and the collimator to cut down on low-energy (< 200 keV) photons.  
+
We put in two thin pieces (thickness ~1/4" each) making a ~1/2" of lead angled at ~30 degrees wrt vertical between the NaI detector and the collimator to cut down on low-energy (< 200 keV) photons.  
  
  

Revision as of 15:23, 29 May 2008

Calibration

Run # MPA file name Description
40 NaI040.mpa Na-22 source in front of HpGe and Co-60 on top of NaI detector
41 NaI019.mpa Co-60 source in front of HpGe and Na-22 on top of NaI detector

Last Dipole Sweep

Tune 10 Mev onto Tungsten and 4 MeV into Cell

We put in two thin pieces (thickness ~1/4" each) making a ~1/2" of lead angled at ~30 degrees wrt vertical between the NaI detector and the collimator to cut down on low-energy (< 200 keV) photons.


Run # MPA file name W Ta Description
45 NaI045.mpa IN IN Dipole at 2 MeV (0.78 on Pot), 60 Hz rep rate
46 NaI046.mpa IN IN Dipole at 2 MeV (0.78 on Pot), 300 Hz rep rate, 116 [math]\pm[/math] 15 counts at 500 keV, Live=929 seconds
47 NaI047.mpa IN Out Dipole at 2 MeV (0.78 on Pot), 300 Hz rep rate, 53 [math]\pm[/math] 9 counts at 500 keV, Live=607 seconds, (Tant IN/Out ratio =116/53 [math]\times[/math] 607/929 = 1.4)
48 NaI048.mpa IN Out Dipole at 3 MeV (1.13 on Pot), 300 Hz rep rate, 90 [math]\pm[/math] 11 counts at 500 keV, Live=600 seconds, ignore NaI (cable not plugged into scope)
49 NaI049.mpa IN In Dipole at 3 MeV (1.13 on Pot), 300 Hz rep rate, 113[math]\pm[/math] 12 counts at 500 keV, Live=634 seconds,plugged NaI cable back into scope in middle of run. ((Tant IN/Out ratio =113/90 = 1.26 )


Accelerator Gun problem (ground wire shielding was worn away and creating path for short)

Run # MPA file name W Ta Description
52 NaI052.mpa IN In Dipole at 3 MeV (1.13 on Pot), 300 Hz rep rate, (1202 set to 15.7 kV. This is the PS for the pulse forming network.) 28[math]\pm[/math] 8 counts at 500 keV, Live=600 seconds.

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