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

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=Calibration=
 
=Calibration=
 +
HpGe HV = 3700 kV
 +
 +
NaI Hv = 1300 V
  
 
{| border="1"  |cellpadding="20" cellspacing="0  
 
{| border="1"  |cellpadding="20" cellspacing="0  
Line 14: Line 17:
 
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" 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.
 +
==Chad Tune==
  
 
  {| border="1"  |cellpadding="20" cellspacing="0  
 
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Line 31: Line 36:
  
  
−
Accelerator RF problem
+
Accelerator Gun problem (ground wire shielding was worn away and creating path for short)
 +
 
 +
==Kevin Tune==
 +
Restore tune with settings below.:
 +
 
 +
{| border="1"  |cellpadding="20" cellspacing="0
 +
|-
 +
|Device || setting
 +
|-
 +
| RS1 || -14.96
 +
|-
 +
| RS2 || +0
 +
|-
 +
|FS1 || 0
 +
|-
 +
|FS2 || 8.58
 +
|-
 +
|0Q1 || -14.75
 +
|-
 +
|0Q2 || +2.26
 +
|-
 +
|45Q1 || -0.62
 +
|-
 +
|45Q2 || +1.88
 +
|-
 +
|L90Q1 || -2.62
 +
|-
 +
|L90Q2 || +2.83
 +
|-
 +
|Bend1 || -3.42
 +
|-
 +
|Bend2 || -5.3 (3 MeV)
 +
|-
 +
|Gun HV|| 3 kV
 +
|-
 +
|Grid|| 1.64
 +
|-
 +
|802 || 15.7 kV
 +
|-
 +
|SOL1 || 0
 +
|-
 +
|SOL2 || 3.58
 +
|}
  
 
  {| border="1"  |cellpadding="20" cellspacing="0  
 
  {| border="1"  |cellpadding="20" cellspacing="0  
 
|-
 
|-
 
|Run # || MPA file name || W || Ta || Description
 
|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.
+
|-
 +
|56|| NaI056.mpa || IN || In|| Dipole at 3 MeV (1.11 on Pot), 300 Hz rep rate, (802 set to 15.7 kV.   48<math>\pm</math> 8 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
 +
|-
 +
|57|| NaI057.mpa || IN || Out|| Dipole at 3 MeV (1.11 on Pot), 300 Hz rep rate, (802 set to 15.7 kV, 24  <math>\pm</math>6 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV. ( Tant In/out ratio = 2/1)
 +
|-
 +
|58|| NaI058.mpa || IN || Out|| Dipole at 4 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV,  25<math>\pm</math>6  counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
 +
|-
 +
|59|| NaI059.mpa || IN || In|| Dipole at 4 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV,  25<math>\pm</math>6  counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
 +
|-
 +
|60|| NaI060.mpa || IN || In|| Dipole at 3 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV,  27<math>\pm</math>6  counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
 +
|-
 +
|61|| NaI061.mpa || IN || In|| Dipole at 3 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV,  1kG Permanent sweeper magnet upstream of last quad. 14 <math>\pm</math>7  counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
 +
|-
 +
|63|| NaI063.mpa || IN || In|| Quads after last dipole set to zero (all above runs have quad polarity for electrons), Dipole at 3 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV,  102<math>\pm</math>11  counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
 +
|-
 +
|64|| NaI064.mpa || IN || In|| swap polarity of Quads after last dipole set to: 45Q2= -1.37 L90Q1=+2.98 L90Q2=-0.98, Dipole at 3 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV,  64<math>\pm</math>9  counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
 
|}
 
|}
 +
 +
 +
[[Image:Run60_HpGe-NaI.gif | 200 px]][[Image:PositronYield_SweeperMagnet_run60-61.gif | 200 px]]
  
 
[http://www.iac.isu.edu/mediawiki/index.php/CHIPS_Run_May-2008 Go Back]
 
[http://www.iac.isu.edu/mediawiki/index.php/CHIPS_Run_May-2008 Go Back]

Latest revision as of 15:11, 30 May 2008

Calibration

HpGe HV = 3700 kV

NaI Hv = 1300 V

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.

Chad Tune

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)

Kevin Tune

Restore tune with settings below.:

Device setting
RS1 -14.96
RS2 +0
FS1 0
FS2 8.58
0Q1 -14.75
0Q2 +2.26
45Q1 -0.62
45Q2 +1.88
L90Q1 -2.62
L90Q2 +2.83
Bend1 -3.42
Bend2 -5.3 (3 MeV)
Gun HV 3 kV
Grid 1.64
802 15.7 kV
SOL1 0
SOL2 3.58
Run # MPA file name W Ta Description
56 NaI056.mpa IN In Dipole at 3 MeV (1.11 on Pot), 300 Hz rep rate, (802 set to 15.7 kV. 48[math]\pm[/math] 8 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
57 NaI057.mpa IN Out Dipole at 3 MeV (1.11 on Pot), 300 Hz rep rate, (802 set to 15.7 kV, 24 [math]\pm[/math]6 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV. ( Tant In/out ratio = 2/1)
58 NaI058.mpa IN Out Dipole at 4 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV, 25[math]\pm[/math]6 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
59 NaI059.mpa IN In Dipole at 4 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV, 25[math]\pm[/math]6 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
60 NaI060.mpa IN In Dipole at 3 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV, 27[math]\pm[/math]6 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
61 NaI061.mpa IN In Dipole at 3 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV, 1kG Permanent sweeper magnet upstream of last quad. 14 [math]\pm[/math]7 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
63 NaI063.mpa IN In Quads after last dipole set to zero (all above runs have quad polarity for electrons), Dipole at 3 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV, 102[math]\pm[/math]11 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.
64 NaI064.mpa IN In swap polarity of Quads after last dipole set to: 45Q2= -1.37 L90Q1=+2.98 L90Q2=-0.98, Dipole at 3 MeV (1.44 on Pot), 300 Hz rep rate, (802 set to 15.7 kV, 64[math]\pm[/math]9 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.


Run60 HpGe-NaI.gifPositronYield SweeperMagnet run60-61.gif

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