 Mon May 12 10:09:21 2025, Christopher, Nils, Accelerator, Intervention TK Chopper - no beam for one hour
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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).
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Mon May 12 14:47:52 2025, Christopher, DAQ, frequency counter 
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| FA-2 frequency counter |
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Mon May 12 21:39:49 2025, Zoran, Runs, DR running again with Bi209
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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 |
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Mon May 12 22:44:00 2025, Zoran, Runs, 209Bi bunched beam
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ntcap restarted (05-12_22-22-23), measuring with bunched beam
10 min breeding time |
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Mon May 12 23:34:39 2025, Carsten, Analysis, Sample DR Spectra
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See attachment - electron current 500 mA.
First spectrum DC,
Second spectrum bunched.
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Tue May 13 00:05:39 2025, Konstantin, Calibration, Cooler HV
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The DR measurement was repeated with proper electron cooler settings. Readout of electron cooler HV is not affected by the Grafana failure and can be displayed
in Medusa in the View "Log-Display". Measured voltages in Subchain 8 are:
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Tue May 13 00:36:27 2025, Finn, Simon, Konstantin, , DR measurements. Night shift.
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[TABLE border="1"]
Time |File | PTB 32 | PTB 33 | Ohmlabs | ESR intensity SC8 | Typical SIS injections | comments |-
00:18 | 27 | 205819 | 205819 | 205812 | 2.24e7 | 4e8 | |-
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Tue May 13 00:43:31 2025, Konstantin, General, Connection interrupt
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| Connection reset to all NUCs by accident manual power cut. |
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Tue May 13 12:59:49 2025, Carsten, Wilfried, Christopher, Nils, General, Setup of ESR for 208Bi
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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.
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Tue May 13 15:34:23 2025, Yuri, Calibration, Particle Identification
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Setting on 208Bi81+
Manipulation after accumulation and orbit shift, before slowing down
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Tue May 13 17:46:35 2025, Carsten, Runs, Start of DR measurements with 208Bi
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Same ramps as before, 8 repetitions.
ESR is set-up for breeding of 208Bi80+.
In order to reduce unwanted primary at injection to the ESR, in the transfer line scrapers are in use, presently GTE4DS5HL -5.0, GTE4DS5HR +7.0
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Tue May 13 21:37:09 2025, Carsten, Runs, DR run with bunched beam / 500 mA /208Bi80+
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Just changed settings towards a new scanning range and bunched beam.
Stopped and started NTCAP, now: IQ_2025-05-13_21-01-44
new ADC file
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Wed May 14 00:11:52 2025, Dimitrios, Simon, Runs, Night shift DR Bi-208
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[TABLE border="1"]
Time |File | PTB 32 | PTB 33 | Ohmlabs | ESR intensity SC8 | Typical SIS injections | comments |-
00:15 | 36 | 205860 | 205861 | 205853 | 0 | 8e8 | something killed the beam after deceleration, particle detectors look fine|-
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Tue May 13 01:21:16 2025, Konstantin, Simon, Analysis, Longitudinal bunch length
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We measured the longitudinal bunch length for all different detectors
[TABLE border="1"]
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 Wed May 14 02:19:46 2025, Dimitrios, Simon, Analysis, Longitudinal bunch length
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We repeated this measurement for 208-Bi. The bunch lengths are about half as long (due to lower space charge and consequently less heating?)
[TABLE border="1"]
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Wed May 14 06:31:28 2025, Dimitrios, Simon, Runs, DR scans @300mA
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We reduced the electron cooler current to 300mA and continued measuring the DR spectrum.
[TABLE border="1"]
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Wed May 14 08:24:39 2025, Danyal, Nils, Hendrik Day shift, Runs, DR scans @300mA
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Continuing with the measurements of the last shift, also at 300mA. Creating new file, as beam got killed during last run.
[TABLE border="1"]
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Wed May 14 11:59:39 2025, Nils, Analysis, Current DR spectra 208Bi
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| Results so far for the DR scans @300mA e-cooler current. |
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Wed May 14 12:43:43 2025, Danyal, Nils, Hendrik Day shift, Runs, DR scans @300mA
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Continuing with the measurements of the last shift, also at 300mA. Creating new file, as beam got killed during last run.
[TABLE border="1"]
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Wed May 14 19:06:51 2025, Carsten, Runs, Different pattern/ Fixes during the day new runs for 300 mA (increased intensities)
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During the day several things were discussed concerning intensity and the pressurized air devicees.
In total 6 to 7 different things are not ok for a proper opreation of the devices (not to be discussed here).
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Wed May 14 22:05:54 2025, Rodolfo, Laser, Laser settings
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Here are summarized some settings of the laser system.
[B]Dye:[/B] Pyrromethene 597 in Ethanol
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