Fixed, e748, Wed Jul 5 14:34:15 2017, Marlene, RUN, General, CD2, Run summary 329,330 
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We thought the merge was broken, but the issue was the Raw Data gruscipt connecting to the wrong port.
Everything reestablished as before. |
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Fixed, e748, Wed Jul 5 15:30:03 2017, Freddy, OFFLINE, General, , MUST2 offline analysis of run 323
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Here is a plot of the MUST2 PID for telescope 3:
- dE - TOF with a veto on CsI_ to remove direct 12Be hitting the detector.
- dE - E ungated for a given crystal close to the beam axis
It concerns only 1 million events. |
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Fixed, e748, Wed Jul 5 17:15:57 2017, e748 DB, RUN, General, CD2, screenshot of scalers
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primary I = 6.9 uA
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Fixed, e748, Wed Jul 5 18:36:49 2017, Freddy, OFFLINE, General, , PID from NUMEXO merged (partially)
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Here is the PID(dE Vs E) plot obained using the IC energy from NUMEXO Vs the plastic energy coded in our acquisition for the long run of last night (323)
The resolution is indeed about 10% (estimated on the 12Be spot.
One can see another line around channel 185 in IC.
By looking at the merger code in more details, it seems obvious that we do not do the merge properly. Size of the file after the merge is much smaller than the input file and some event seems to be duplicated.
It has to be investigated and modified. |
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Fixed, e748, Wed Jul 5 18:47:25 2017, e748 DB, RUN, General, CD2, new run - 331
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primary I = 6.9 uA
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Fixed, e748, Wed Jul 5 19:05:13 2017, e748 DB & IS, RUN, General, CD2, tritons in the beam
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Tritons can be seen from the following plot. Some of them cross target frame and then lose 1.5MeV in the DSSDs.
12Be particles are stopped by the frame.
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Fixed, e748, Wed Jul 5 19:10:33 2017, e748 DB&IS, ONLINE, General, CD2, tritons in the beam
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Tritons can be seen from the following plot. Some of them cross target frame and then lose 1.5MeV in the DSSDs.
12Be particles are stopped by the frame.
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Fixed, e748, Wed Jul 5 21:13:14 2017, e748 IS, RUN, General, CD2, RUN 331 scalers
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primary beam I = 6.5 uA unstable in the last 30 minutes (20h20 - 20h45)
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Fixed, e748, Wed Jul 5 22:29:10 2017, e748 DB, ONLINE, General, CD2, trajectories
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Fixed, e748, Thu Jul 6 00:07:33 2017, e748 DB, ONLINE, General, CD2, Strips CATS raw
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Fixed, e748, Thu Jul 6 01:00:21 2017, Freddy, MUST2, Hardware, N/A, Problem with position of télescopes 6&7
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| Due to a cabling problem telescope 6 was seen as telescope 7 and inversly. |
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Fixed, e748, Thu Jul 6 01:26:15 2017, Franck et Valérian, CHIO, Hardware, N/A, UPDATE : CHIO's electronic scheme (valid from run 293)
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| Since Run 293 inspection line of NUMEXO 2 has been used as input signal of CAEN digitizer. |
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Fixed, e748, Thu Jul 6 01:34:42 2017, e748, RUN, General, CD2, Run 331 (file change)
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1:25 file change -> run_0331.dat.05-07-17_18h45m44s.2
18O beam: 6.6 uAe
CATS1: 40000 cps
CATS2: 44000 cps |
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Fixed, , Thu Jul 6 02:02:48 2017, Anastasia, OFFLINE, General, , First signs of the elastic
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Hereby you can see some first signs of the elastic scattering 12Be(d,d)12Be
with punch through events that will be later taken care of, after the calibration of CsI. |
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Pinned, e748, Thu Jul 6 02:41:13 2017, Freddy and the night shifters, CHIO, General, , CHIO analog treatment
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Interestingly, the bipolar output of the amplifier of the CHIO sent (and splitted) to check correlation on the channel 15 of the ADC CHIO (or on channel 29 of the ADC MUST2) provides a much better resolution (about 10%) than the one obtained using the unipolar output that we were looking since then (about 20% resolution).
This can be understood by the fact that the bipolar signal from the spectroscopic amplifier filters the baseline fluctuation by deriving the unipolar signal.
On the attached PID plot, it is easy to see the improvment. On the other hand, the beam spot extends also at lower channels and covers part of the other lines.
Since the unipolar signal will have some negative part (undershoot), it is possible for pile-up signals to arrive on top of this negative part and end up with lower energy.
With numexo, the energies extracted from the digitized signals, this undershoot issue is not visible. |
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Fixed, e748, Thu Jul 6 03:03:39 2017, iFreddy and the night shifters, CHIO, General, , CHIO analog (unipolar and bipolar) and digital
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Interestingly, the bipolar output of the amplifier of the CHIO sent (and splitted) to check correlation on the channel 15 of the ADC CHIO (or on channel 29 of the ADC MUST2) provides a much better resolution (about 10%) than the one obtained using the unipolar output that we were looking since then (about 20% resolution).
This can be understood by the fact that the bipolar signal from the spectroscopic amplifier filters the baseline fluctuation by deriving the unipolar signal.
On the attached PID plot, it is easy to see the improvment. On the other hand, the beam spot extends also at lower channels and covers part of the other lines.
Since the bipolar signal has a negative part, it is possible for pile-up signals to arrive on top of this negative part and end up with lower energy.
With NUMEXO, the energies extracted from the digitized signals, this pile-up issue is not visible (see other plots, with less stat).
With Caen digitzer, last plot, and a very basic algorithm.
We have explored all the possible way to extract signal from this detector. We are thinking of writting a Nature on this analysis, if collaborators have any comments on those plot, they are not welcome. |
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Fixed, e748, Thu Jul 6 03:35:32 2017, e748, RUN, General, CD2, Run 331 (file change)
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3:30 file change -> run_0331.dat.05-07-17_18h45m44s.3
18O: 7.2 uAe
CATS1: 40000 cps
CATS2: 44000 cps
CHIO: 40000 cps
Acq speed 110 events/s |
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Fixed, e748, Thu Jul 6 05:48:26 2017, e748, MUST2, General, CD2, SiLi 1/T5 trip
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Restart SiLi 1/T5 that reached 26 uA and tripped a few minutes ago.
Current = 21 uA when biased up again, and reaches 24 uA in a few minutes. |
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Fixed, e748, Thu Jul 6 06:23:18 2017, e748, RUN, General, CD2, Run 331 (file change)
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6:19 file change -> run_0331.dat.05-07-17_18h45m44s.4
18O 7.1 uAe
CATS1 : 36000 cps
CATS2 : 39000 cps
CHIO : 37000 cps
110 events/s |
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Fixed, e748, Thu Jul 6 07:17:05 2017, e748, MUST2, General, CD2, SiLi 1/T5 trip
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SiLi 1/T5 tripped at 7:16.
We turn it on again immediately -> 23 uA |
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