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  nuclear two-photon decay, Page 12 of 12  Not logged in ELOG logo
Entry  Thu Jul 1 20:35:21 2021, Andrew Nic Shahab, DAQ, Acquisition stopped  
Checking if signal can be further amplified 

Last files:
245MHz 2021.07.01.20.36.11.218
410MHz 2021.07.01.20.35.46.847
Entry  Thu Jul 1 20:48:58 2021, Shahab Andrew Nic, DAQ, Acquisition started 
15dB amplifier on 410MHz 
Entry  Fri May 7 08:04:22 2021, Carlo Bruno, Desislava Kalaydjieva, Analysis, 7:00 - 14:00 analysis shift 15x
(See
https://triumfoffice365-my.sharepoint.com/:w:/g/personal/dillmann_triumf_ca/Eb_LCp7yTx5Bgc8TO8khJmEBWeS-ycdPRnG02wQout-fgQ?rtime=3n3A3xMR2Ug
for remote shifter instructions. To be updated/corrected by the experts)

08:00 Analysed data from 6 am to 7 am  (Note file names are one hour behind).
Using e143_analyzer.py -t 0.5 E143-245MHz-2021.05.07.05.*
See attachments 1,2,3

08:17 Analysed data from 7am to 8am (Note file names are still one hour behind)
As above.
See attachments 4,5,6

Analysed data from 8am to 9am (Note file names are still one hour behind)
As above.
See attachment 7

At 8:50 Yury changes trigger on scope from 50% to 1% (minimum value).
We should now have the beginning of the injection as well, and isomers should appear at 0.1 s

9:35 Lost beam from SIS

09:45 Analysed data from 9am to 9:30 am (Note file names are still one hour behind)
These are the first data with the new trigger settings
As above
See attachment 8

11:50 Beam is back, scraper being optimised.
12:30 Scraper optimisation complete.

13:00 Analysed data from 12:30 to 12:45 roughly.
Attach 9 - default code. -t 0.5
Attach 10 - new untested code with skip function. See Slack#analysis. -t 0.5 -s 0.2
Attach 11 - as 10, log scale on the y

13:48 Analysed data from to 12:30 to 13:35
-t 0.5 Attach 12
-t 1 Attach 13 (log y) 

14:05 Lost beam in ESR

14:30 Analysed data from 13:00 to 14:00 before we lost beam.
-t 0.2 -s 0.1
Attach 13 & 14

14:35 Beam is back 

15:00 Shift handed over to AG and CJC
Entry  Tue Jun 29 21:10:30 2021, Shahab, Runs, 72-Ge setting 
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
Entry  Fri Jul 2 20:33:44 2021, Yuri, Accelerator, 70Se setting with closed scrapers 
We tune back to 70Se.
The scrapers stay closed at EEXDS2HA=0 mm, EEXDS1HG=+5 mm
"Single"-particle run
Entry  Sat May 8 01:43:23 2021, Helmut Weick, Accelerator, 70Se setting 
If gamma_t = 1.3955 Tm stays, we will need Brho = 6.21902 Tm for 70Se.
The corresponding ESR Brho setting will be a bit shifted.
It then requires E-SIS = 446.55 MeV/u to get 70Se to this Brho and gamma_t.

For pre-drilling with 78Kr beam at same Brho use 416.70 MeV/u.
But we could also make a quick try without tuning before, just change all energies.
Entry  Wed Jun 30 08:59:37 2021, Yuri, Accelerator, 70Se setting 
X(9Be)=1.815 g/cm2 (adjusted in primary beam setting)

Gamma_t=1.3956
E(70Se)=368.499 MeV/u
Br(70Se)=6.21993 Tm

Pre-drilling:
E(78Kr)@Br(70Se)=337.461 MeV/u
E(SIS) = 415.792 MeV/u

Fragment Setting:
E(SIS) = 445.68 MeV/u
Entry  Fri May 7 04:26:54 2021, Shahab, Runs, 245 MHz resonator extra 20dB gain off 
made sure that the extra 20dB amplifier is off.
Entry  Wed Jun 30 13:04:40 2021, Shahab, Runs, 245 Amplifier on amplification_on245.png
turned on extra 20dB amplifier for the 245 Resonator around 12:32 
Entry  Fri Jul 2 07:31:44 2021, The remote Canadian eager beavers (Iris and Guy), Analysis, 00h to 05h Summed Spectra 245MHz-07.02.00-05h-sum_10ms.png245MHz-07.02.00-05h-sum_10ms_zoom.png410MHz-07.02.00-05h-sum_10ms.png410MHz-07.02.00-05h-sum_10ms_zoom.png
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 
full 5 hours, let me know.
I've attached the spectra from 0s to 4s  for the 410MHz and 0s to 2s for the 245MHz, including zooming in on the injection timing. 

Given that we are summing 5 hours of data so the background is very smooth, I can only conclude that either the isomer doesn't exit, we cannot resolve it, or we are 
producing incredibly low amounts such that the search needs to be needle in a haystack. 
Entry  Sat May 8 21:42:51 2021, All, Accelerator, Set up for 52Mn 
Details will follow
E(Mn) = 368.41 MeV/u
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