Wed Jun 30 02:12:46 2021, Shahab, Runs, still no beam in ESR: quadrupole magnets are down
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still no beam in ESR: quadrupole magnets are down |
Wed Jun 30 01:38:20 2021, Shahab, Runs, beam is back from Linac but not in the ESR
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Wed Jun 30 00:20:10 2021, Rui-Jiu Chen, Analysis, ID of 70Se setting on May
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This is an old spectrum which was recoded on May. |
Wed Jun 30 00:12:55 2021, Rui-Jiu Chen, Analysis, the ID of 72Ge setting
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Tue Jun 29 21:15:01 2021, Kanika, Shahab, Runs, lost beam problem Unilac
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cooling water in UNILAC is out |
Tue Jun 29 21:12:15 2021, Kanika, Shahab, Runs, Moving the resonance frequency of the 245 MHz resonator
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moving in the plungers:
before: 400
after: 200 |
Tue Jun 29 21:10:30 2021, Shahab, Runs, 72-Ge setting
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the new setting is roughly 400 khz lower in frequency.
Previous beam time Ge was on 243.100 now it is on 242.74
we decided to use the higher harmonic:
expecting it on 244.66 MHz |
Tue Jun 29 20:40:55 2021, Rui-Jiu Chen, DAQ, start NTCAP
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Carrier Frequency:245MHz.
IQ rate 20MSamples/s
Reference level:-90 dBm
SC_2021-06-29_20-38-27
IQ_2021-06-29_20-38-27 |
Tue Jun 29 20:13:58 2021, Helmut, Sergey, Yuri, Accelerator, change to predrilling an 72Ge
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After optimisation of sextupoles we found a scraper position which makes a narrow peak and keeps 20% of the injected beam.
GEEXDS2HA = +2.0 mm (out is +130mm)
GE01DS_HI = -75 mm (out is -130mm)
removed scrapers again for predrilling.
We agree on gamma_t = 1.3956, E/m = 368.50 MeV/u.
Then for 78Kr at Brho = 6.79675 Tm of isoc 72Ge
E-SIS = 466.63 MeV/u, assume target of 1815 mg/cm² Be
after target E/m = 393.024 MeV/u
In ESR-Modi set for same E/m but different m/q (m=72, Z=q=32)
Injection looks good like before with isochronous 78Kr we go directly to the next step
72Ge with E-SIS = 440.16 MeV/u to get 72Ge at gamma_t. |
Tue Jun 29 10:32:10 2021, Sergey, Helmut, Accelerator, cooler curves for tuning of isochronicity
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Variation of quadrupole E01QS03D to change gamma_t in isoc. mode
measured with 78Kr at 368.5 MeV/u on 28.06.2021 evening.
The shape of the three curves looks very similar they would only require a different beam velocity.
But I suppose we stay with the value close to the old one (gamma_t ~ 1.3956). |
Mon Jun 28 18:32:49 2021, Ruijiu, Shahab, DAQ, trigger signal connected to NTCAP and analyzers
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Fri Jun 25 21:47:24 2021, Yuri, Analysis, Identification
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Attached are two files with a proposed particle identification.
Different colors indicate different harmonic numbers |
Thu Jun 24 22:05:11 2021, Helmut Weick, Accelerator, LISE files for 72Ge, 70Se, 52Mn settings
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This is just a Brho selection by the ESR based on SIS-energy used,
energy-loss in target with calibrated thickness and momentum spread by the reaction (Goldhaber formula).
Production cross sections are by EPAX 3.1 |
Mon May 10 08:49:01 2021, Kanika, Alex, RuiJiu, General, End of the measurement
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The beam was stopped at about 08:40. |
Sun May 9 17:39:21 2021, Guy, Analysis, Comparison between 72Ge: 7th 19h vs 8th 21h
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Following Xiangcheng Chen's analysis, I analysed 11 ms time slices separated by 25 ms to see the evolution of the potential isomer across the injection.
Attachment 1: Data from May 7th 19h-20h. -t 11ms progression from -s=5 to -s=5.175
Attachment 2: Data from May 8th 21h-22h. -t 11ms progression from -s=5 to -s=5.175
The extra resolution gained on the 8th (and potentially other settings too) make the isomer visible where it wasn't present on the 7th. |
Mon May 10 04:08:13 2021, Iris (Chris C., Jeff C.), Analysis, Comparison between 72Ge: 10th 1-2am on 245 MHz
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> Following Xiangcheng Chen's analysis, I analysed 11 ms time slices separated by 25 ms to see the evolution of the potential isomer across the injection.
>
> Attachment 1: Data from May 7th 19h-20h. -t 11ms progression from -s=5 to -s=5.175
> Attachment 2: Data from May 8th 21h-22h. -t 11ms progression from -s=5 to -s=5.175
>
> The extra resolution gained on the 8th (and potentially other settings too) make the isomer visible where it wasn't present on the 7th.
Hi, attached is the sum of all spectra from 1-2am on May 10th, on the 245 MHz detector. Takes me forever to download everything...
I used the same parameters as Guy and Xiancheng: LFRAMES = 512 (in analyzer); -t 0.011 (= 11 ms) -s 5 ... 5.175 s.
Resolution looks good... :-) |
Mon May 10 05:25:29 2021, Iris (Chris C., Jeff C.), Analysis, Comparison between 72Ge: 10th 1-2am on 410 MHz 8x
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Same as before, but for 410 MHz detectors.
Peaks visible in the 3rd-5th slice.
> > Following Xiangcheng Chen's analysis, I analysed 11 ms time slices separated by 25 ms to see the evolution of the potential isomer across the injection.
> >
> > Attachment 1: Data from May 7th 19h-20h. -t 11ms progression from -s=5 to -s=5.175
> > Attachment 2: Data from May 8th 21h-22h. -t 11ms progression from -s=5 to -s=5.175
> >
> > The extra resolution gained on the 8th (and potentially other settings too) make the isomer visible where it wasn't present on the 7th.
>
> Hi, attached is the sum of all spectra from 1-2am on May 10th, on the 245 MHz detector. Takes me forever to download everything...
> I used the same parameters as Guy and Xiancheng: LFRAMES = 512 (in analyzer); -t 0.011 (= 11 ms) -s 5 ... 5.175 s.
>
> Resolution looks good... :-) |
Mon May 10 06:22:15 2021, Iris (Chris C., Jeff C.), Analysis, Comparison between 72Ge: 10th 1-2am on 410 MHz 9x
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Same as before but for 4-5am on 410 MHz detector. Peak visible.
> Same as before, but for 410 MHz detectors.
> Peaks visible in the 3rd-5th slice.
>
>
> > > Following Xiangcheng Chen's analysis, I analysed 11 ms time slices separated by 25 ms to see the evolution of the potential isomer across the injection.
> > >
> > > Attachment 1: Data from May 7th 19h-20h. -t 11ms progression from -s=5 to -s=5.175
> > > Attachment 2: Data from May 8th 21h-22h. -t 11ms progression from -s=5 to -s=5.175
> > >
> > > The extra resolution gained on the 8th (and potentially other settings too) make the isomer visible where it wasn't present on the 7th.
> >
> > Hi, attached is the sum of all spectra from 1-2am on May 10th, on the 245 MHz detector. Takes me forever to download everything...
> > I used the same parameters as Guy and Xiancheng: LFRAMES = 512 (in analyzer); -t 0.011 (= 11 ms) -s 5 ... 5.175 s.
> >
> > Resolution looks good... :-) |
Mon May 10 07:13:20 2021, Iris (Chris C., Jeff C.), Analysis, Comparison between 72Ge: 10th 5-6am on 410 MHz 9x
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Same as before for 5-6 am.
Peak still there, maybe a bit less than before.
> Same as before but for 4-5am on 410 MHz detector. Peak visible.
>
>
> > Same as before, but for 410 MHz detectors.
> > Peaks visible in the 3rd-5th slice.
> >
> >
> > > > Following Xiangcheng Chen's analysis, I analysed 11 ms time slices separated by 25 ms to see the evolution of the potential isomer across the injection.
> > > >
> > > > Attachment 1: Data from May 7th 19h-20h. -t 11ms progression from -s=5 to -s=5.175
> > > > Attachment 2: Data from May 8th 21h-22h. -t 11ms progression from -s=5 to -s=5.175
> > > >
> > > > The extra resolution gained on the 8th (and potentially other settings too) make the isomer visible where it wasn't present on the 7th.
> > >
> > > Hi, attached is the sum of all spectra from 1-2am on May 10th, on the 245 MHz detector. Takes me forever to download everything...
> > > I used the same parameters as Guy and Xiancheng: LFRAMES = 512 (in analyzer); -t 0.011 (= 11 ms) -s 5 ... 5.175 s.
> > >
> > > Resolution looks good... :-) |
Mon May 10 06:35:58 2021, Kanika, Alex, Shahab, Runs, going back to shot by shot recording with 410 detector
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going back to shot by shot recording with 410 detector |
Mon May 10 06:16:31 2021, Kanika, Alex, Shahab, Runs, Recording broad band spectra with 410
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doing some broadband spectra recording with the 410 MHz detector, for the purpose of future confirmation of identification lines. |
Mon May 10 03:37:53 2021, Chris C, Analysis, isomer? or wishful thinking?
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They are not easy to find, but we do occasionally see what might be the isomer. |
Mon May 10 01:34:37 2021, Chris C, General, Zoom screenshot
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How things look currently in Zoom-world. |
Mon May 10 01:01:59 2021, Kanika, Alex, RuiJiu, General, Beam is back
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The issue has been resolved and the beam is back since 00:56. |