 Sat Dec 8 10:46:51 2012, Barry, , , scintillator gain change documentation in EPICS 
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Here are some plots of the scintillator count rate (Scaler S4) overnight. The first shows the result of a gain shift, the second a positive effect
from tuning in ISAC-I, and the third another gain shift. |
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Thu Dec 13 13:21:55 2012, Naomi Galinski, , , calibration alpha source used
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Before run: (gain changed since source run was done)
S2: 3-alpha R-00866 2.81e3 Bq 5. Aug. 10 (Tigress source)
LEDA: 241Am 3.67e5 Bq 15. Sept 09 (Dragon source) |
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Thu Dec 6 09:54:42 2012, Naomi Galinski, , , Target and target ladder position
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| 1.75 mg/cm2 C foils located at position 1 (69.4 mm) and 3 (99.2 mm) |
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Thu Dec 6 21:05:46 2012, Naomi Galinski, , , TUDA setup - how to get TUDA ready for our experiment
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- Ground test TUDA chamber.
- Vacuum test chamber and check cooling of preamps. Temperature sensor for preamps must be attached inside chamber.
- Mount beam tuning target holes (5, 3, 1 mm) and target holders (with 10 mm holes) |
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Thu Dec 6 09:56:17 2012, Naomi Galinski, , , Si detector distances
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Face of S2 is 5.2 cm from target.
Face of LEDA is 55.7 cm from face of S2. |
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Thu Dec 6 22:42:49 2012, Naomi Galinski, , , Run 248 & 249 - no beam current monitor
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Run 248 Start 6:50 am
Run 249 Start 11:01 am
64 MeV Li8 beam. |
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Thu Dec 6 22:31:53 2012, Naomi Galinski, , , Run 242 - alpha calibration
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3-alpha source used on S2
241Am source used on LEDA |
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Thu Dec 6 21:24:42 2012, Naomi Galinski, , , Pump down, venting, cooling preamps and epics
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Pump down and venting of chamber is controlled via the TUDA epics.
http://www.triumf.info/wiki/tuda-tactic/index.php/EPICS_and_ISAC_status
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Thu Dec 6 21:26:55 2012, Naomi Galinski, , , Old TDC trigger setting + Tom's log book entry scans in pdf
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This is a scan of Tom's log book for an experiment. One of the pages contains their trigger setting. There might be other useful things in there too.
https://elog.triumf.ca/Tuda/S1287/110621_025629/tuda_book13_1-47.pdf
The uploaded pdf is their TDC trigger setting which is just a crop of a page in the file above. |
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Thu Dec 6 21:23:25 2012, Naomi Galinski, , , MIDAS UK configuration and startup
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Here are some useful links and files:
http://npg.dl.ac.uk/MIDAS/MIDASDataAcquisition/base.html
http://npg.dl.ac.uk/documents/edoc247/edoc247_7.htm |
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Thu Dec 6 10:38:12 2012, Naomi Galinski, , , MIDAS ADC channels
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LEDA: 8 sectors with 16 segments each
S9418#11.adc0 - 15 -> Sector 0
S9418#11.adc16 - 31 -> Sector 1 |
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Fri Dec 7 17:40:59 2012, Sky, , , Integrated 8Li current screenshot
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Sat Dec 8 09:17:42 2012, Naomi Galinski, , , Histogram screen shots
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Screen shots of:
1) ADC 11 ch 0-7 Corresponds to LEDA 0 ch 0-7
2) ADC 4 ch 0-31 Corresponds to S2 front ch 0-31 |
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Thu Dec 6 11:03:10 2012, Naomi Galinski, , , Detector specs
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S2 500 um: I think the bias is - 75V. I pulled that out from a previous Tuda experiment elog
VT100 monitor readout:
S2-1 75 V - leakage current ~ 5 uA |
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Thu Dec 6 20:28:23 2012, Naomi Galinski, , , DAQ configuration
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VME crate (master): VME V430
1x MVME2431 VME processor module, slot 1
1x SBS master, slot 2 |
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Thu Dec 6 22:30:13 2012, Naomi Galinski, , , Beam current and Si triggers
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Thu Dec 6 10:58:31 2012, Naomi Galinski, , , Amplifier gain and thresholds
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Gain:
Max channel no. in Silena 9418 ADCs is 4096. We want the max channel correspond to just above 70 MeV.
We have the 241Am single source in front of the LEDA and the 3-alpha source in front of the S2. Therefore we want the 5.4856 MeV alpha peak |
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Thu Dec 6 10:41:35 2012, Naomi Galinski, , , 3-alpha source energies
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239Pu: Ealpha = 5.1055 MeV (11.94%)
Ealpha = 5.1443 MeV (17.11%)
Ealpha = 5.1566 MeV (70.77%) |
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Thu Dec 6 10:08:12 2012, Naomi Galinski, , , 16O 4+ stable beam tuning
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242 pA @ upstream FC
229 pA @ TUDA FC through 1 can hole
209 pA through 5 mm hole in target ladder |