 Thu May 6 17:48:48 2021, W. Korten, Helmut, General, ESR setting for 72Ge ions with primary beam
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Setting the 78Kr (after the target) to the Brho of the 72Ge beam at 368.4 MeV/u (gamma=1.3955), i.e. 6.79575 Tm, which leads to an energy of 392.93 (of
78Kr).
With the 10mm Be target the beam energy should then be 467.8 MeV/u .
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Thu May 6 14:30:23 2021, W. Korten, General, Target thickness
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Thickness of the Carbon target in the TE line has been measured by centering the primary 78Kr beam in the ESR:
Beam energy 370 MeV/u, with thin stripper, ESR energy 368.65 MeV
Adjust beam with "thick" target to keep ESR energy at 368.65 MeV/u -> Beam energy 445 MeV/u
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 Fri Jul 2 06:52:11 2021, The remote Canadian eager beavers (Iris and Guy), Analysis, Summary of spectra 0:00-6:00 (410 MHz) 
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Same as before but for 0-6h, 25ms time slices starting at 1.04s.
> Same as before for 4-5h and 5-6h.
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Fri Jul 2 07:31:44 2021, The remote Canadian eager beavers (Iris and Guy), Analysis, 00h to 05h Summed Spectra
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Using the scripts I posted previously, I summed 5.5 hours of data from midnight to 5:30 July 2nd CEST.
I used 10ms time steps for better time resolution, but that did leave questionable frequency resolution. If anyone would like to see higher resolved frequency
plots for the
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Sat Jul 3 01:28:08 2021, The remote Canadian eager beavers (Guy and Iris), Analysis, Summed spectra 410 MHz from 21:00-23:59 (70Se)
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Here's a picture with all injections with an ion in the spectrum (empty ones were removed- list below). The time slices are 0-0.5-1-1.5-2s, then in 0.2s
steps up to 3s. Not really anything to see :-( The previous shift was right, looking at single spectra might be more useful. I'll group the pictures and
upload some "interesting" ones.
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Sat Jul 3 06:49:55 2021, The remote Canadian eager beavers (Guy &Iris), Analysis, List of possible spectra with isomer decay
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Attached is an example for the possible isomer (on the left) next to the 70Se (right).
Here's the list with the files to look at, btw 21:00-6:30. Further analysis needs to be done offline. The slight frequency shift overnight made it a bit |
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Sat Jul 3 03:07:43 2021, The remote Canadian eager beavers (Guy & Iris), Analysis, Some single spectra (410 MHz) from 21-24h
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| Attached are some single spectra with a rough attempt to group them according to the different ions that appear. |
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Sat Jul 3 03:41:48 2021, The remote Canadian eager beavers (Guy & Iris), Analysis, Summed Spectra Summary
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To summarise the method of bulk summing the spectra, I've created frequency vs time spectra by using the e143_analyser.py script to stack a series of -s
slices. I applied it to some of last runs data with 72Ge, to the 72Br data, last night's less-scraped 70Se, and tonight's more-scraped 70Se, respectively.
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Sat Jul 3 04:33:50 2021, The remote Canadian eager beavers (Guy & Iris), Analysis, Slight shift in 70Se frequency
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Looks like the beam is slightly drifting...the 70Se peak frequency is slightly shifted to the left, by ~0.5 kHz compared to earlier spectra. Might be a
problem with the analyzer (?) or the storage ring energy (slightly lower?)... nothing drastical but to be observed. |
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Sat Jul 3 06:48:38 2021, The remote Canadian eager beavers (Guy & Iris), Analysis, Closer potential isomer tracks
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After looking through >800 shots from Jul 2nd 21h to Jul 3rd 05h, we couldn't find a single example of a "smoking gun" isomer decay. I.e. I'm talking about
the examples Liliana posted earlier. We did find many examples (roughly 10%) where the ion track spontaneously
disappeared, but this shouldn't be the isomer as there was no frequency shift.
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Sat Jul 3 07:35:31 2021, The remote Canadian eager beaver (Iris), Analysis, Closer potential isomer tracks
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Here's a list of the spectra to look at for the potential isomer, taken btw 21:00 on July 2nd and 6:30 on July 3rd. Two examples attached.
Name Comment
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Fri Jul 2 01:31:35 2021, The remote Canadian beavers (Iris, Guy), Analysis, First spectra after bottle change
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| The first good spectra after the gas bottle change is from 23:38:25 (on the 410 MHz Analyzer) |
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Fri Jul 2 01:34:03 2021, The remote Canadian beavers (Iris, Guy), Analysis, Summary of spectra 22:00-23:00
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The last hour before the gas bottle change is summarized here.
The first pic shows the 410 MHz spectra taken from 22-23h on the 410 MHz analyzer, in time slices of 0.1 sec from 0s-2s.
The second pic shows the spectra in 20ms slices from 1s-1.16s.
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Fri Jul 2 02:03:36 2021, The remote Canadian beavers (Iris, Guy), Analysis, Summary of spectra 0:00-1:00
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Same as before, for 0-1h on July 2nd
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Fri Jul 2 04:27:38 2021, The remote Canadian beavers (Iris and Guy), Analysis, Summary of spectra 0:00-4:00 (410 MHz)
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Same as before for 0-4h on July 2nd.
> Same as before, for 0-1h on July 2nd
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Fri Jul 2 06:33:48 2021, The remote Canadian beavers (Iris and Guy), Analysis, Summary of spectra 4:00-6:00 (410 MHz)
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Same as before for 4-5h and 5-6h.
No isomer, I think :-( (Sorry, Wolfram!)
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Fri Jul 2 19:57:12 2021, Shahab, Yuri, Wolfram, Liliana, Runs, stop DAQ
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At 19:56 the DAQ is stopped.
The plan is to go back to the setting for Se.
Last files for the Br setting:
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Thu Jul 1 20:48:58 2021, Shahab Andrew Nic, DAQ, Acquisition started
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| 15dB amplifier on 410MHz |
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Fri May 7 03:51:56 2021, Shahab, Analysis, peak frequencies
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| a reference schematic of the peaks on 410 MHz (211th harmonic) and 245 MHz (126th harmonic) |
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Fri May 7 04:01:51 2021, Shahab, Runs, Picture after scraping
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this picture is after scraping by helmut, showing the 410 MHz detector, that is we would expect an isomer where the marker M1 is, i.e. at 2.2kHz on the
left side, which we unfortunately don’t see (yet). |