Ongoing, e744, Tue May 29 01:25:07 2018, Phil, Valerian, Franck, EXL-PPT, General, N/A, LaBr3 Background for reference 
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For reference, we include a picture of the LaBr3 background found by some random Google searching until we found a nice happy looking picture.
Remember (I'd forgotten despite having literally had this conversation with someone in the past) that the LaBr3 internal background lies at exactly the same energy as the 40K room background (which is why LaBr3 isn't good for environmental monitoring, innit) so you don't know whether the peak there is from the internal activity or the 40K from the energy (however, on the basis of how much activity of each is around it's from the internal activity). |
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Ongoing, e744, Tue May 29 01:33:58 2018, Phil, Valerian, Franck, EXL-PPT, General, , Gamma-ray spectra from PPT
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Attached are plots of gamma-ray energy spectra from PPT.
2-D plot is the PPT-CATS time (from PPT-MUST2 and MUST2-CATS time, obviously).
Two 1-D plots are PPT energy spectra gated on the two loci which can be seen in the 2-D plot.
Note that the 1.6-ish MeV line which may ordinarily expect to be due to the internal background from LaBr3 appears strongly in the prompt spectra and isn't really randomly time-correlated. We are suspicious, however, that the resolution is too good and that the peaks may be an artefact. We are checking this and will update this post accordingly. |
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Fixed, e744, Tue May 29 02:01:58 2018, Franck, Valerian, Phil, RUN, General, Carbon, Run 2104 - Target 1 Carbon
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Run 2104
Beam: 14O
Start @ 2:00 29 May 2018
Stop @ 4:01 29 May 2018
Target 1 Carbon
Franck, Phil, Valerian
Beam rate (CATS): 1.4e5 pps |
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Fixed, e744, Tue May 29 02:38:21 2018, Franck, Valerian, Phil, ONLINE, General, Carbon, Spectra and HV Start Run 2104 11x
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Fixed, e744, Tue May 29 04:08:52 2018, Franck, Valerian, Phil, RUN, General, Carbon, Run 2105 - Target 1 Carbon
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Run 2105
Beam 14O
Start 4:06 29 May 2018
Stop 6:06 29 May 2018
Target 1 Carbon
Franck, Valerian, Phil |
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Ongoing, e744, Tue May 29 05:07:33 2018, Valerian, OFFLINE, General, CH2, Fusion evaporation background and physics data
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| Comparison between the fusion evaporation background and the data for the telescope 5 ~0degree angles and rough subtraction of this background. |
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Ongoing, e744, Tue May 29 05:24:34 2018, Valerian, EXL-PPT, General, CH2, Comparison of background and physics data for gamma ray detectors
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| Gamma ray spectrum for both targets seem extremely close. Subtraction is then made but no gamma show. More statistic is needed |
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Ongoing, e744, Tue May 29 06:09:58 2018, Franck, Phil, RUN, General, Carbon, Run 2106 - Target 1 Carbon
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Run 2106
Beam 14O (CATS: 1.4e5 pps)
Start 6:08 29 May 2018
Stop 6:17 29 May 2018
Stopped because FAG rate low and ORDs low, "BAD MERGE" error messages
Target 1 Carbon |
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Ongoing, e744, Tue May 29 07:39:53 2018, Franck, Phil, RUN, General, Carbon, Run 2107 - Restart after Reboot of VXI - Same problem
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Low FAG rate: 30 /s
Low ORD rates: 0-10 /s, 15 /s on MM5 |
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Ongoing, e744, Tue May 29 08:09:02 2018, e748, RUN, General, Carbon, RUN 2108 - Target1 Carbon 11x
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Run 2019
Acq recovered
Beam: 14O
start: 8h04m40s
start: 8h15m07s
Target 1 Carbon
Stopped the run to enter and switch back to the CH2 target |
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Ongoing, e744, Tue May 29 08:59:18 2018, Freddy, Iulian, Pierre, RUN, General, CH2, Run 2109 - Target 4 CH2 - Tuning run
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Run 2109
Beam: 14O (1.5*10^5 pps)
start: 8h37m01
stop: 9h26
Target nbr 4: CH2 (104 um)
Remark:
- Telesecope 4 is tripping all the time during this run. Impossible to put more than 50V. Even at 40 V, the leakage current is fluctuating around 8 uA. It seems like it is dying.
- LISE spectrometer adjustment during run - The attached plot show the final result of the beam tuning. |
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Pinned, e744, Tue May 29 09:30:42 2018, Freddy, Iulian, Pierre, RUN, General, CH2, Run 2110 - Target 4 CH2
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Run 2110
Beam: 14O (1.5*10^5 pps)
start: 9h27m29s
stop: 9h50m35s
Target nbr 4: CH2 (104 um)
Warning: Telescope 4 HV was at 40 V at the beginning of the run. The leakage current finally stabilized and decreased down to about 1.5 uA. We tried to increase the HV to the nominal voltage of 80 V but the leakage current suddenly raised to 10-15 uA again. We decide to let it to 60V for a while. In short Telescope 4 data can't be used for this run. |
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Pinned, e744, Tue May 29 09:54:01 2018, Freddy, Iulian, Pierre, RUN, General, CH2, Run 2111 - Target 4 CH2 8x
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Run 2111
Beam: 14O (1.5*10^5 pps)
start: 9h51m
stop: 10h30
Target nbr 4: CH2 (104 um)
Remark: T4 HV at 60 V during all the run.
Run stopped because something tripped in CSS1. |
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Fixed, e744, Tue May 29 10:42:00 2018, Francois, BEAM, General, , effective beam time
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In total, there were:
1.4 UT of 14O, average 2x10^5 pps
0.7 UT of 14N, calibration
0.7 UT of background subtraction (carbon)
+ plot of the beam current during the last day. |
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Fixed, e744, Tue May 29 12:06:05 2018, iulian maurycy, OFFLINE, General, CH2, Carbon substraction
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The scale factor for Carbon subtraction is 1.224. This means: RealCountsHidrogen=Counts CH2 - 1.224 * CountsCarbon
runs considered for the CH2 target
/home/e748/analysis/nptool/Projects/e744/conversion/rootdir/run_2013_0.root
/home/e748/analysis/nptool/Projects/e744/conversion/rootdir/run_2014_0.root
/home/e748/analysis/nptool/Projects/e744/conversion/rootdir/run_2015_0.root
/home/e748/analysis/nptool/Projects/e744/conversion/rootdir/run_2016_0.root
/home/e748/analysis/nptool/Projects/e744/conversion/rootdir/run_2017_0.root
/home/e748/analysis/nptool/Projects/e744/conversion/rootdir/run_2018_0.root
after the long interruption
/home/e748/analysis/nptool/Projects/e744/conversion/rootdir/run_2101_0.root
/home/e748/analysis/nptool/Projects/e744/conversion/rootdir/run_2102_0.root
run 2100 was not considered
runs considered for the Carbon subtraction:
after the long interruption
/home/e748/analysis/nptool/Projects/e744/conversion/rootdir/run_2103_0.root
/home/e748/analysis/nptool/Projects/e744/conversion/rootdir/run_2104_0.root
/home/e748/analysis/nptool/Projects/e744/conversion/rootdir/run_2105_0.root
the rest of runs was not considered |
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Ongoing, e744, Tue May 29 15:53:17 2018, Iulian Maurycy, OFFLINE, General, CH2, Angular distribution per telescope 1-4
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| Angular distribution per telescope 1-4 |
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Ongoing, e744, Tue May 29 16:23:56 2018, Valerian Iulian Maurycy, OFFLINE, General, CH2, Hint of a 2p peaks
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Fixed, e744, Tue May 29 17:14:41 2018, François, Freddy, Valérie, BEAM, General, , Beam back in D6
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At 17pm Tuesday 29th we have beam coming back in D6. Run (without storage)
NB: The current on T4 (with Hv set 60V) is fluctuating between 4 and 6.5 µA. |
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Ongoing, e744, Tue May 29 18:49:21 2018, Valerian, OFFLINE, General, CH2, Comparison of gamma prompt spectrum for EXL and PPT
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| Quick note, there is less data seen in EXL prompt. This should be investigated |
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Fixed, e744, Tue May 29 19:03:38 2018, Valérie (edit), RUN, General, CH2, Run #2112 BEAM BACK 14x
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run #2112
Beam back given by the machine.
Beam+ Lise team: Omar K and Pierre Delahaye, Jean-Charles T.
Evening shift team : Valérian, François, Iulan, Valérie
start @ 20h00
stop @ 21h35
Beam intensity from 8. 10**4 pps to around 10**5 pps
target n°4. CH2 104 µm
All triggers, (no LISE)
Divisions CATS1 3. 10**4. PPT 3000 ; EXL 10**4
cf current of T4 to be checked regularly. At present with the beam the current is around 10.5 µA (fluctuates between 9 and 11 µA) for HV set at 60 V.
Beam rate is reduced at the end of the run, around 4000-5000 pps.
The machine operators are trying to recover the initial rate.
Next run (2113) will be started in the low rate conditions. |
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