The beam is back as before since 11:02.

~ 20:00 changed E-SIS to 524.0 MeV/u to get 194Pb at the Brho of the primary beam before (=7.2008 Tm).
which corresponds to gamma = 1.400 for 194Pb82+. 
Before it was E-SIS = 480.5 MeV/u after Be-1839 mg/m^2 target Brho = 7.2014 Tm.
Keep target and beamlines and ESR the same, only SIS and TE-line before target is changed.

First a setting with orbit bump for injection on central orbit was tried.
- quadrupoles tuned and scrapers optimized

Then back to an ESR setting without this bump like last year.
- again quadrupoles tuned and scrapers optimized
This gave a good resolution in which the isomer should be resolved.

Just after this was achieved all resolution was lost.
Making the input for ESR setting again recovered it, now with slightly different scrapers.

Quads: K'L Q3D / Q6D = -0.3603263
Sext: K''L GE01KS2 = -0.14
           GE01KS3 =  0.05

scrapers: GEEXDS1HA =  -5 mm
          GE01DS3HG = -70 mm 

Details see paper scans below.

A Bio-REM detector on the roof of ESR caused an alarm and shut down the whole accelerator.
Too much primary beam going to ESR, noe we avoid it by catching the primary beam at TE4 slits.
The distribution on current grids looks liek in the LISE simulation, we cut at 5mm.
The beam come sin three charge states tehouter ones 82+, 81+ anyway do not make it to ESR, we need to cut also the 80+ at least half.
Then the dose rate on ESR roof is much lower 0.8 uSv/h -> 0.2 uSv/h.

the new scraper setting for good isochronicity but still acceptable intensity losses is:
Done at ~ 15:00 today.
GEEXDS1HA (outside)          =  -8 mm
GEEXDS1HG (ToF-det-aperture) =  20.5 mm
GE01DS3HG                    = -84.2 mm  (fully open is -130 mm)
in addition, a detector pocket is in GE01DD2IG = 1.7 mm

We set up the Genesys. Channel map:

tr0:
IO1: Trigger MBS
IO2: Trigger NTCAP
IO3: None
IO4: Trigger RSA01
IO5: Trigger RSA02

tr1: 
None

There was no beam from SIS between about 06:28 and 06:39.

Again from 07:02 to 07:11.

And again from 07:49 to 07:55.

The NTCAP computer and crate are switched off.
The triggers are disconnected from the RSAs, but they remain on.

new settings:
1.8 seconds recording on 245 MHz on RSA02

starting from file name:

2025.04.04.18.36.32.895


settings are in the attachment

RSAs had to stop because the cycle of 1.8 came too often, both analyzers could not catch up with the file transfer.


changed to 1.7 seconds

last file in the 1.8 setting:

RSA01-2025.04.05.18.20.46.005
RSA02-2025.04.05.18.20.43.346


new filenames from the 1.7 s settings:

RSA01-2025.04.05.18.28.12.146.tiq

new analysis settings:

[analysis]
nframes = 80
lframes = 131072
avg = 4




Explanation:

every file has 10625050 samples with 1.7 seconds length
sampling rate: 6.25 MSPS
this means every sample is worth: 1.6e-7 seconds
this means every frame with length of 2^17 samples will have a time length of: 21 ms
finally with an averaging of 4 frames into one, this means that every time frame in the NPZ file will have 80ms length



frequency setting

please see attached pictures.

HKR just called to say a power supply to the SIS18 extraction kicker has failed.
The service person has been called and is expected to take ~1h to arrive and approx. ~2h to carry out the repair.

Beam was returned to the ESR at 05:11.

HKR said there had been some problem with one of the dipoles and in order to restore it a power supply had to be reset, which took some time.

05:41 data are back in the RSAs. Files that contain data from:
RSA01-2025.04.02.05.41.14.938.tiq_spectrogram.npz
to:
RSA01-2025.04.02.06.24.01.530.tiq_spectrogram.npz


06:24 data not visible again, only noise.

06:43 data are ack in the RSAs. Files that contain data from:
RSA01-2025.04.02.06.43.43.580.tiq_spectrogram.npz

02:44 beam is back

screenshots of Lassie