Mew numbers for 245 MHz plunger is 190 (both)

now making shorter shots with 98-Mo
3 seconds each
50 MSPS

98Mo
13:57  RSA01-2024.05.18.13.57.32.674.tiq, RSA02-2024.05.18.13.57.32.472.tiq
13:58 RSA01-2024.05.18.13.58.32.760.tiq, RSA02-2024.05.18.13.58.32.552.tiq
14:00 RSA01-2024.05.18.14.00.23.759.tiq, ../RSA02/RSA02-2024.05.18.14.00.23.551.tiq
14:01 RSA01-2024.05.18.14.01.09.543.tiq, ../RSA02/RSA02-2024.05.18.14.01.16.038.tiq
14:01 RSA01-2024.05.18.14.01.54.049.tiq, ../RSA02/RSA02-2024.05.18.14.02.05.544.tiq 


last long shot :
14:05 RSA01-2024.05.18.14.05.14.375.tiq, ../RSA02/RSA02-2024.05.18.14.08.54.672.tiq

1 second each 


RSA01-2024.05.18.14.08.54.879.tiq

Since around 11:30, Lustre is down, therefore in https://sparc-daq-02.gsi.de/, the spectrograms are not being updated. Expected time to recovery > 2 hours.
The data will still be stored on the local hardisk. Whenever Lustre is online, we start file transfer and analysis.

Attached can be found an information email sent:
-------------------
Dear Lustre-users,

the main metadata server of the Lustre file system shows repeated errors that break I/O on at least
some clients.

We will have to restart the server, which will cause a downtime of min. 2 hours.
-----------------------------------------------------------------------

The cooler curve measured during May 14 afternoon.

Important - analysis 
-> we are trying to get PID with a new setting to see if 98Zr decays with 30s half-life
--> we are taking 1 min cycles 
---> strongest line does not corespondents to 96Sr38+ as it decays very fast (few seconds) and we observe long-lived one - still we have to confirm this 

----> analysis is still ongoing 

We lost the beam at 19:35

 

Sergey started with a setting with quadrupoles already changed like in 2021.
Ths was used for the first isochronicity curves.
It also gave soem, however, not good peak shapes with scrapers closed.
But after a failure only a new setting of quads could revover the peaks.

Then more cooler curves were measured and found to have quite a slope.
Changing ESR energy does not change the curves much, but changing the quads does.
With the stronger variation of quads (+1.65% on two quadrupole families) the curve tilts to opposite side.

All curves in EXCEL.
Cooler voltage converted to Brho with gamma ~ 1.4 and curves in relative frequency spread shifted on top of each other.
In new injections the quads are set new, which causes a frequency jump. Pasted parts of curves to remove jump.

two pages of log book on paper for teh first setup,
injection into ESR and tuning primary beam 100Mo and fragment 98Mo.

After the orbit correction on the target straight section the scrapers work better.
One pair of scrapers works best:
GEEXDS2HA (outside straight section =  low Brho side) = -4.0 mm
GE02DS3HG (outside arc              = high Brho side) = -71.4 mm
All other scrapers are open (finished playing with scrapers ~18:20)
When one side is opened more one can cut more on the other.
We can attack the beam from both sides.
With scrapers good resolution, David already posts lifetimes of the isomer.
Details in paper log book.

After the Beam position tuning but before the scraper tuning two more cooler curves were taken.
The first with all scrapers open shows a similar shape to before with the same quadrupole setting.
Afterwards the ESR ebergy was shifted by -0.8 MeV/u to get the beam more on an outer orbit.
The curve then is shifted and has a bit less acceptance.

Apparently fewer spills coming from SIS18, see attached.

Beam was lost at 20:17:52. 

Injection Beam Process: 100ms
Bunching Beam Process: 16ms
Intermediate Beam Process: 100 ms, which is repeated 140 times
Intermediate Beam Process: 16 ms

- stop longer measurements
- change quadrupole and sextupole magnets
- rescale SIS-TE-ESR

plunger motors were set

to +/-390 mm for 245 MHz resonator
and +/-55 mm for 410 MHz resonator

HHT sees radiation from us. We stop for 10 min for them to see the speed with which the radiation level decreases.

Only 96Sr would yield very few line with only ions from tiem to time.
So we went a bit lower in Brho 7.69 Tm -> 7.65 Tm.
The setting is calculated as a 98Mo39+.
E-SIS = 455.3 MeV/ for 100Mo.
after target 98Mo now with 39+ gives 7.6500 Tm.
In ESR also 39+.
In LISE we get the same average gamma as before for 98Zr (gamma = 1.40082).

Only 96Sr would yield very few line with only ions from time to time.
So we went a bit lower in Brho 7.69 Tm -> 7.65 Tm.
The setting is calculated as a 98Mo39+.
E-SIS = 455.3 MeV/ for 100Mo,
after target 98Mo now with 39+ gives 7.6500 Tm.
In ESR also 39+.
In LISE we get the same average gamma as before for 98Zr (gamma = 1.40082).

The 98Zr was also entered as a 98Mo40+-

We are optimizing setting for 96Sr
start time: 21:52

ESR is down