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  nuclear two-photon decay, Page 12 of 12  Not logged in ELOG logo
ID Date Author Categoryup Subject
  195   Fri Jul 2 03:19:49 2021 IK, KKRunsdrop of intensity
And the intensity is back again to 5E9 at 03:20
  212   Fri Jul 2 14:18:04 2021 Pavlos, AlexandreRunsChange of the measurment to 72Br
Both resonators will now be retuned to look for the isomeric state in 72Br.

Last files for 70Se are:
245MHz-2021.07.02.14.17.14.507.tiq
410MHz-2021.07.02.14.16.48.528.tiq
  218   Fri Jul 2 19:57:12 2021 Shahab, Yuri, Wolfram, LilianaRunsstop DAQ
At 19:56 the DAQ is stopped. 
The plan is to go back to the setting for Se. 
Last files for the Br setting:
- 410MHz-2021.07.02.19.57.36.721.tiq
-245MHz-2021.07.02.19.58.03.216.tiq
  219   Fri Jul 2 20:01:16 2021 LilianaRunsSome plots from the Br setting
  2   Wed Apr 28 09:36:39 2021 Helmut WeickSimulationsLISE file for fragments from TE3UF into ESR
Uncooled beam on target at TE3UF with dispersion and slit in TE beamlne and realistic injection into ESR.
Now tuned for 72Ge but can easily be modified to other fragment settings. 
The target thickness may need adjustemet after measurement.
The attched powerpoint file explains the settup a bit more.
  3   Tue May 4 13:26:40 2021 YuriSimulationsExpected spectrum 72Ge
A       Z      M/q                Int    difference in kHz@245MHz
68	30	2.263614752	35	-933.1
70	31	2.255131564	124	-457.0
36	16	2.247394703	1	-21.2
45	20	2.24726171	1	-13.7
81	36	2.247136805	1	-6.7
72	32	2.247041397	376	-1.3
72	32	2.247018215	376	0
63	28	2.246941324	1	4.3
54	24	2.246906236	1	6.3
74	33	2.239572482	568	420.9
65	29	2.238342523	100	490.5
76	34	2.232371568	62	829.3
67	30	2.230357529	100	943.7
69	31	2.222859086	172	1370.7
60	27	2.219224118	100	1578.3
62	28	2.211179746	100	2038.7
77	35	2.197207311	116	2842.5
  4   Tue May 4 17:54:08 2021 Helmut WeickSimulationsupdated LISE file
This file really has the optics like used in the last ESR experiments.
Now the transmission is also a little bit better.
  5   Tue May 4 18:25:31 2021 Helmut WeickSimulationscutting of primary beam
The slits at TE4 and TE5 can be used to cut away the unwanted 78Kr beam (see pictures).
We do not want activation of the beamline. 78Kr35+ even has a chance of being injected.
  6   Tue May 4 21:49:04 2021 Helmut WeickSimulationscut Brho by scrapers
The dispersion from the production target into the ESR is not matched.
This is not good for momentum acceptance, but we anyway want to cut the acceptance.
Dispersion will oscillate with the tune of ESR. After 3 turns we expect a maximum dispersion. 
The picture shows in red the dispersion curve for dp/p=0.1% and beam envelopes of 10 mm mrad.
So we can use scrapers in north or south arc to cut Brho. It should be done from both sides.
How much? Watch the intensity drop.
Best positions look at plot. Straight section outside for low Brho, arc outside for high Brho.
Could be EEXDS2HA and E02DSH (outside).
  8   Thu May 6 00:32:57 2021 Helmut WeickSimulationsGICOSY file for TE beamline and ESR
This file has several options:
start in SIS, at TE3UF target or inside ESR, choose with GOTO LABEL (G L)after start system (S S).
Depending on the choice select different start beam parameters at top of file, others comment out.

There are also different optics setting with different quadrupoles:
- for TE beamline the standard and the mode by Hans for better focus on the target.
- for ESR a standard mode and variations of isochronous modes
also select by commenting in/out.

Input can be made also in units of K'L for fast import from parammodi, still by hand but with copy and paste.
One half of ESR is defined as a block, can be used more or less often (B I HALF ;)
  64   Sat May 8 01:33:25 2021 Helmut WeickSimulationsfrequency list for 70Se setting
EXCEL table with all possible fragments injected into ESR.
The path length in ESR, gamma_t and harmonic are adjusted to the 72Ge data. 
Some lifetimes are limited but all intense lines are >30s in lab system.
There are two versions (for cooled beam with fixed v or uncooled (isochronous) 
with fixed average Brho, take the second (grey) column.
For larger frequency shifts harmonics will overlap.
You can add more isomers.
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