At 11am there will be an intervention for about one hour related to the TK chopper - hence no beam for SIS as well as ESR.
During that time, the pneumatic drives within ESR will be mechanically checked (lubricated).

The ESR-colleagues re-checked the charge states in the ring. 

FA-2 frequency counter

Stronger spectra than before, probably due to a stronger overlap with the electron beam.
Open files starting with run_0022, finished with 0025, each one about 6 min charge breeding and 11 min ramp
ntcap stopped, electron current 500 mA, DC beam

ntcap restarted (05-12_22-22-23), measuring with bunched beam
10 min breeding time

See attachment - electron current 500 mA.
First spectrum DC,
Second spectrum bunched.
Resolution is slightly worse for bunched beam but not dramatically.
Please note, that the ratio DR/RR is 1:1. 
Spectra are about 4-5 injection cycles each. (and due to the shorter lifetime with 8 scans instead of 15 scans).
ion beam intensity : about 2e7 Li-like
Other settings as before.

-> Resonance is now at the correct energy!

• 500mA cooler current, file 25-26 (CR DAQ), NTCAP folder closed
  

  Ohmlabs	205854
  PTB 3.2	205861
  PTB 3.3	205862

  
  
  
• 250mA cooler current, file no.27 (CR DAQ), NTCAP folder "IQ_2025-05-13_00-18-48"
  

  Ohmlabs	205812
  PTB 3.2	205819
  PTB 3.3	205819

  
  

Connection reset to all NUCs by accident manual power cut.

In the morning the colleagues from ESR setup the beam for production of 208Bi81+, however the identification (via the schottky) of the correct fragments and charge states is still ongoing.

Issue with the pneumatic drives (scraper/detector) is still not solved yet, however we want to give it a try with the current limitations unless it becomes absolutely necessary.

Setting on 208Bi81+
Manipulation after accumulation and orbit shift, before slowing down

f(MHz) - A/Q <<< comment
243.031 - 209/80 <<< primary beam charge state
<<< missing @243.068 - 201/77 
<<< missing @243.111 - 206/79 
243.191 - 203/78
243.231 - 208Bi80+ ******
243.274 - 200/77
243.314 - 205/79
<<< missing @243.360 - 197/76 <<< probably under the bump of uncooled beam <<< has been seen in another manipulation
<<< missing @243.396 - 202/78 <<< probably under the bump of uncooled beam <<< has been seen in another manipulation
<<< missing @243.431 - 207/80 <<< probably under the bump of uncooled beam <<< has been seen in another manipulation
<<< missing @243.482 - 199/77 <<< probably under the bump of uncooled beam
243.516 - 204/79 <<< a_pi=-0.17
243.549 - 209/81 <<< primary beam charge state
<<< missing @243.604- 201/78 
243.634 - 206/80 <<< a_pi=-0.168
243.694 - 198/77
243.721 - 203/79 <<< a_pi=-0.170
243.746 - 208Bi81+ ***** 
243.784 - 195/76
243.811 - 200/78 <<< a_pi=-0.172
243.836 - 205/80
243.879 - 192/75
243.904 - 197/77
243.926 - 202/79
243.946 - 207/81 << a_po=-0.170

Results so far for the DR scans @300mA e-cooler current.

Continuing with the measurements of the last shift, also at 300mA. Creating new file, as beam got killed during last run.

[TABLE border="1"]
Time |File | PTB 32 | PTB 33 | Ohmlabs | ESR intensity SC8 | Typical SIS injections | comments |-
8:42 | 42 | 205826 | 205827 | 205820 | 4e5 | 4e8 | opened new file |-
9:07 | 42 | 205826 | 205827 | 205820 | 4e5 | 4e8 |-|-
9:34 | 42 | 205826 | 205827 | 205820 | 3e5 | 4e8 |-|-
9:59 | 42 | 205826 | 205827 | 205820 | 0 | 4e8 | DS3HG went to  position 20.4, killing the beam |-
10:24 | 43 | 205826 | 205827 | 205820 | 3e5 | 4e8 | opened new file |-
10:51 | 43 | 205826 | 205827 | 205820 | 0 | 4e8 | Beam in the ESR got killed again. DS3HG is at normal position though, so we don't know why |-
11:17 | 44 | 205826 | 205827 | 205820 | 0 | 4e8 | opened new file, DS3HG killed the beam again |-
11:41 | 45 | 205826 | 205827 | 205820 | 2e5 | 4e8 | opened new file |-
12:07 | 45 | 205826 | 205827 | 205820 | 0 | 4e8 | DS3HG killed the beam by going too far for just a second and then going to normal position. Maybe that was the reason some previous beams got killed even though when we looked at the scraper it was in the normal position. Stopped measurements so Sergey can maybe fix the issue with the scraper. Slightly adjusting the setpoints of the scraper should fix the problem of it going too far. Last file got closed. |-
[/TABLE]

• Detectors are moved in in SC9 and out in SC12. Due to the 3 internal beam processes (BP1 to BP3) the old SC7 was not suited for that.
  
• The waiting machine for measurements is now SC10
  
• The ranp file has now a 5 seconds waiting at the beginning to compensate for the longer time between ramping down and scraping.
  
• As a byproduct the deceleration decomes more efficient.
  
• Since the detector north 02DD2AG seems to drivemore reliable than the scraper 02DS3HG we now use the detecotr north for scraping.
  
• Positions in SC9: 01DD2AG: -55 (destroys beam at ~-25); 01DD1AG: 26; 02DD2_G: -60, all out positions (SC12) are 120 (-120)
  
• Due to the higher number of beam processes, changes of electron current or the delta voltage have to be performed in both, SC8 and SC10.
  
• The first 10 channels or so in the DR spectra might show some weird behaviour - don't worry that is "by design" (aka due to the changes above).
  
• We now had 2e6 208Bi80+ for 8e8 SIS current (15 injections, 45 cycles breeding at 10s) - thre still seems to be some headroom.