 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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Wed May 25 03:15:44 2011, Brian, Routine, General, Start of run summary and TDC problems
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Summary at start of run
Read through the runbook and end of run summar and the situation appears to be:
1. The check of the tune showed it was OK, although a bit of beam (or halo) clipping 4mm collimator |
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Tue May 24 23:59:16 2011, Jennifer Fallis, Lars Martin, Routine, General, Shift summary
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Buncher problem was resolved around 22:00 (driver module needed to be replaced).
Checked current on FC0 and trigger rate, around 4000 presented. We then started a run, only got 20 acquired,
stoped and restarted a run, then all relevant numbers seemed normal.
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Tue May 24 20:45:12 2011, Mike Bentley, Other, General, Update for during the day 24th May, wednesday 
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Update:
W decided at 8.00 to stop, check the tune, retune and get back going. This has nearly, finished but it is a very long process indeed - note for
future - this takes AT LEAST 12 hours, if one is systematic about it. |
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Tue May 24 08:18:23 2011, Mike Bentley, Routine, General, end of shift summary
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We have been running smoothly all night. Only problem is that the DAQ occasionally does not start properly after a stop-go. The dead-time goes
to nearly 100%. This happened twice in the night,. and a second stop-go did the trick. Needs looking at.
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Tue May 24 01:47:17 2011, Anonymous, , , Shift schedule, as of 1am Tuesday 24th
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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 |
 Tue May 24 01:16:37 2011, Tom Davinson, Routine, General, Re: End of Shift summary
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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 stop mode) after a DAQ crash causing broad loci in the E vs T spectra and
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Tue May 24 00:01:03 2011, Oliver and Hicham, Routine, , end of shift summary
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Things have been running smoothly from 4 pm to midnight.
Reading in FC0 = 120-130 epA
Total trigger (accepted trigger) = 7500 (4000) Hz |
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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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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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Mon May 23 02:12:14 2011, Brian, Routine, , Start of Run summary
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Handover from last shift was...
1. Running at 4.11 MeV/u at about 15enA (5+)
2. Would like to take more beam but already at situation where deadtime about 50%. They have been raising thresholds on the inner strips |
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Sun May 22 11:45:03 2011, Tom Davinson, , , 4.11MeV/u 21Ne(5+)
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Sat May 21 18:25:36 2011, Jamie Brown, , , Beam spot
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Fri May 20 05:47:08 2011, Tom Davinson, , , 3.25MeV/u 21Ne(5+)
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Wed May 18 09:09:02 2011, Alison Laird, , , Status update
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Wednesday morning:
4 new windows were tested last night. 2 very good.
Now venting to install and test Faraday cup, install and test camera. |
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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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Wed May 18 08:54:08 2011, Alex Murphy, , , Photodiode data from target thickness measurements
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| In attachment are the peak position in the photodiodes (with high gain setting) for the target thickness measurements. |
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Tue May 17 12:32:13 2011, Jamie Brown, , , Thick carbon target
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The thick carbon target, to be used for background runs for the thick CH2 measurement was supplied by Marek.
He measured it to be 120um thick (with a micrometer), and says it's low density carbon (1.03g/cm3).
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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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Sun May 15 13:07:12 2011, JB, , , W detector V-I curve
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York W detector 2635-19
1037um |
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