 Mon Apr 11 18:39:17 2011, Tom Davinson, , , Monday 11 April 
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TUDA was successfully re-installed on SEBT1 by LB, TD, AML and PM.
Alignment checked by pillar mounted telescope downstream of HERACLES
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Sat Apr 9 14:57:30 2011, Tom Davinson, , , MIDAS DAQ configuration 11x
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tuda2 (by TUDA chamber, SEBT1) was powered off on arrival
- this may have been due to a previous power outage between
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Wed May 25 22:45:42 2011, Jamie Brown, , , Leakage current in S2-1
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At approximately 7pm, noted that trigger rate in S2-1 had dropped by factor of ~20. Detector had tripped off due to leakage current reaching 8uA - spotting
this was delayed as camera (or web-browser) monitoring currents had frozen. Current trip point has been increased to 12uA, and the beam intensity lowered
to try to preserve the detector through out the night. |
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Thu May 26 12:53:48 2011, Jamie Brown, , , H2 fill and vent procedures
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Please note that these procedures are not perfect and other small operations not listed may need to be carried out. Some mistakes may still exist in
these procedures which could introduce significant risk if not spotted and corrected during the process. These should only be carried out by people confident
they understand the system and the purpose of each step, giving due consideration to each step to ensure it is appropriate and safe. |
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Fri Apr 15 11:00:17 2011, Tom Davinson, , , Friday 15 April
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11.15 See attachment 1 for overnight EPICS log of TUDA2.CG5
Downstream flange *not* secured by four bolts
Current pressure 0.97Torr - rate of increase ~0.2 Torr/5h
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Thu May 26 23:57:34 2011, Derek, Routine, General, Friday 00:00 - 08:00 Summary
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Sarah informed me that Jamie was performing the sorting and saving of spectra differently and didn't know what exactly to do so I will not be performing
any sorting.
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Wed May 18 08:58:53 2011, Alex Murphy, , , Foil energy losses
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I've analysed data from runs 4 to 12, which were the alpha irradiations
of PD1 and PD3 through the foils.
Time, 'target', which PD is being irradiated. |
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Mon May 23 09:59:23 2011, Mike Bentley, Routine, General, End/Dtart of Run Summary (BRF/MAB)
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Ran all night OK, currently 14epA, H2 stable, DAQ stable
ISSUES:
1. Analysis of S4200 in offline sort lead to conclusion that specttrum is dominated by protons, 8MeV punchthrough visible??.Not many events at |
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Wed May 25 07:09:17 2011, Brian, Routine, General, End of run summary (yes, a bit early, but done all I can think of!)
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Running status
Everything seems to be running OK. ADC and TDC spectra look OK. Chamber pressure has stabalised. Detector leakages stabalised
Beam now up to 60pnA with trigger rate about 4,000/s and accepts about 3,000/s |
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Mon May 23 02:16:32 2011, Jamie Brown, , , End of run summary
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Plan for shift was to increase trigger thresholds on S2-1 and S2-2 to cut out the low energy "stuff" which is dominating our trigger rate,
and preventing us from increasing the beam current. S2-1 thresholds were at 10mV and S2-2 at 25 and 30mV.
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Thu May 26 00:15:18 2011, Hicham and Sarah, Routine, , End of run summary
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still running at 3.98 MeV/u
19:08
S2-1 had tripped off due to leakge current going above 8uA |
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Mon May 23 15:58:30 2011, Mike Bentley, Routine, General, End of Shift summary
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OK - summary of events during this shift.
1.TDCs. We have been sorting offline, and we have now established that between run 66 and run 79, the TDC mode was incorrectly set (not in common |
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Mon May 16 21:14:19 2011, Jamie Brown, , , Broken solder on PD2
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| As you can see... |
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Sat May 21 18:25:36 2011, Jamie Brown, , , Beam spot
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Wed Jul 18 08:29:03 2012, Jessica Tomlinson, Other, General, Analysis update
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Energy calibration for S2-2 was done using the pulser data (set 6 of the pulser runs) to calculate the offsets and alpha run R186 to calculate
the gains and constant. For S2-1 pulser walkthrough 6 was also used to calculate the offsets and the gains calculated using run 31 which is 21Ne beam scattering
from Au/C target. The constants were then calculated by fitting a least squares fit to the alpha peaks from run 186 and the gold scattering peak from run |
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Mon Sep 24 07:16:18 2012, Jessica Tomlinson, Other, Other, Analysis update
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Energy vs Time plots
I updated the monte carlo written by Alex to include time and also created new SRIM tables for 250 Torr rather than |
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Sun May 22 11:45:03 2011, Tom Davinson, , , 4.11MeV/u 21Ne(5+)
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Fri Nov 16 07:12:32 2012, Jessica Tomlinson, Other, General, 4.11 MeV/u analysis 6x
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I have sorted the 4.11MeV/u data runs (the ones which had the common stop mode on the TDCs) and applied the following cuts:
There must be a hit registered in each side of the detectors.
equal energy must be deposited in both sides of the detectors.
Low energy cut is applied to each detector.
Must have a hit in the TDC for the front strips.
Must have multiplicity |
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Fri May 20 05:47:08 2011, Tom Davinson, , , 3.25MeV/u 21Ne(5+)
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Sat May 28 07:46:09 2011, Lars Martin, Routine, General,
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Beam current dropped to 85 epA at the start of the shift, operator checked for reasons and decided to change
stripper foil. That brought the current back up, but it started decreasing again, so from run to run slits were
gradually opened further to keep FC0 current at about 100 epA.
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