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 | ||
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|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. | |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 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 9 counts at 500 keV, Live=607 seconds, (Tant IN/Out ratio =116/53 607/929 = 1.4) |
| 48 | NaI048.mpa | IN | Out | Dipole at 3 MeV (1.13 on Pot), 300 Hz rep rate, 90 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 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 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 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, 256 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, 256 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, 276 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 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, 10211 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, 649 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV. |
