Tue Apr 12 13:24:40 2022, Alexandre, Sebastian, Detectors, Sideband in Schottky
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Sometimes we see a broad sideband at lesser schottky frequencies to the high intensity thorium beam.
Pic 1 shows the relative broad sideband on the left.
Pic 2 depicts the vanishing of the sideband after ~1-2 minutes. |
Tue Apr 12 14:11:52 2022, Ragan, Detectors, Sideband in Schottky
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> Sometimes we see a broad sideband at lesser Schottky frequencies to the high-intensity thorium beam.
>
> Pic 1 shows the relative broad sideband on the left.
>
> Pic 2 depicts the vanishing of the sideband after ~1-2 minutes.
These are not the sidebands. Maybe some short-lived fragments survive even after the scrapers are used? |
Tue Apr 12 12:41:20 2022, Alexandre, Sebastian, Accelerator, no beam in SIS18
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Tue Apr 12 04:43:29 2022, Alexandre, Kristian, Sebastian, Runs, 322.01 - 321.60 nm
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We scan the wavelength scan range is 322.01 - 321.60 nm
before the first scan of the new wavelength range we changed the high voltage divider ratio in Labview from 248514 to 248517, which is the correct value for this voltage. This leads to slightly higher cooler voltages in the log.
Time | SIS-intensity | cooler-HV | LMD-DAQ2 file nr | LMD-DAQ1 file nr | scan range(nm) | step width(nm) | dwell time(s) | particles counted | comments
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04:40 | 1.9e9 | 209625 | 0203 | 7938 | 322.01 - 321.60 | 0.002 | 5s | 8830 |
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05:20 | 1.7e9 | 209626 | 0204 | 7939 | 322.01 - 321.60 | 0.002 | 5s | 7800 |
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06:00 | 1.6e9 | 209626 | 0205 | 7940 | 322.01 - 321.60 | 0.002 | 5s | 8500 |
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06:45 | 1.7e9 | 209620 | 0206 | 7941 | 322.01 - 321.60 | 0.002 | 5s | 9400 | cooler HV decreased slowly by a few V, jumped back at ~7:03
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07:25 | 1.8e9 | 209620 | 0207 | 7942 | 322.01 - 321.60 | 0.002 | 5s | 9300 |
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08:05 | 1.75e9 | 209620 | 0208 | 7943 | 322.01 - 321.60 | 0.002 | 5s | 9100 |
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08:45 | 1.7e9 | 209618 | 0209 | 7944 | 322.01 - 321.60 | 0.002 | 5s | 9000 | cooler HV decreased 5V to 209614 and jumped back to initial value after ~5s
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09:25 | 1.7e9 | 209618 | 0210 | 7945 | 322.01 - 321.60 | 0.002 | 5s | 8500 |
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10:05 | 1.9e9 | 209618 | 0211 | 7946 | 322.01 - 321.60 | 0.002 | 5s | 9200 | cooler HV decreased steadily to 209611 V during the run
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10:45 | 1.9e9 | 209611 | 0212 | 7947 | 322.01 - 321.60 | 0.002 | 5s | 7500 | After injecting into the ESR, we saw after cooling some tails left and right of the Shottky peak of Th. Was not there in the runs before. After some minutes it disappeared in the spectrum
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11:35 | 2e9 | 209611 | 0213 | 7948 | 322.01 - 321.60 | 0.002 | 5s | | it seems to be that much lesser ions are stored in the ESR - counter shows low rate - ABORTED laser didn't start scanning
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11:58 | 1.75e9 | 209615 | 0214 | 7949 | 322.01 - 321.60 | 0.002 | 5s | 7700 | cooler HV jumped to 209610 at 12:12 and stayed there
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12:53 | 1.85e9 | 209611 | 0215 | 7950 | 322.01 - 321.60 | 0.002 | 5s | 7155 | cooler HV increased slowly from initial value to ~209618
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13:32 | 1.9e9 | 209612 | 0216 | 7951 | 322.01 - 321.60 | 0.002 | 5s | 6638 |
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14:39 | 1.8e9 | 209610 | 0217 | 7952 | 322.01 - 321.60 | 0.002 | 5s | 6815 | Voltage was jumping around from 209610 up to 209624 and back
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15:20 | 1.75e9 | 209612 | 0218 | 7953 | 322.01 - 321.60 | 0.002 | 5s | 8400 | In contrast to the previous measurement, the cooler voltage was drifting by about 3V around 209612
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16:00 | 1.7e9 | 209612 | 0219 | 7954 | 322.01 - 321.60 | 0.002 | 5s | 7920 |
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16:58 | 1.5e9 | 209612 | 0220 | 7955 | 322.01 - 321.60 | 0.002 | 5s | 4577 | PMT North voltage and threshold modified Entry 221, Ecooler voltage dcreased to 209609 V, weak injection
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18:09 | 1.62e9 | 209609 | 0221 | 7957 | 322.01 - 321.60 | 0.002 | 5s | | During the last injection the beam suddenly got lost during the scraping, File 7956 was discarded since go4 was still during the startup of mbs
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18:49 | 1.69e9 | 209609 | 0222 | 7958 | 322.01 - 321.60 | 0.002 | 5s | 6133 |
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19:49 | 1.6e9 | 209610 | 0223 | 7959 | 322.01 - 321.60 | 0.002 | 5s | 7035 |
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20:29 | 1.78e9 | 209611 | 0224 | 7960 | 322.01 - 321.60 | 0.002 | 5s | 4490 |
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21:12 | 1.86e9 | 209622 | 0225 | 7961 | 322.01 - 321.60 | 0.002 | 5s | 10296 | Note that the cooler voltage is increased. Particle number might be overestimated since it was read when the beam was already dumped.
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Mon Apr 11 22:33:16 2022, Carsten, General, Backup of data to the external RAID disks
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Mon Apr 11 22:14:51 2022, Konstantin, Sarper, Laser, Changing of the wavelength range
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It is planned to change the scan range of the laser wavelength from 322.41 - 322.0 nm to 322.01 - 321.6 nm @ 4 a.m. |
Mon Apr 11 18:57:18 2022, Rodolfo, Laser, New flashlamps
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We (Sarper, Konstantin and me) have changed the old flashlamps (with ~ 26 Mio. shots) by new "fresh" ones. We have also exchange the dye. Here are some parameters of the laser we measured with the new flashlamps and dye*:
- Output energy after the Quanta-Ray (@ 532 nm): 598 mJ.
- Seed energy for Cobra (@ 532 nm): 505 mJ.
- Correction factor for monitor; 15.9.
- Output energy after Cobra's main amplifier cell (@ 640 nm): 107 mJ.
- Output energy after SHG (@ 320 nm): 15.8 mJ.
* all values are average over 500 shots.
** below you can see a picture of the "old" flashlamps. |
Mon Apr 11 18:46:31 2022, Rodolfo, Sarper and Konstantin, Laser, Alignment-check
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We cross-checked the laser-ion alignment. The horizontal position was optimized. However,
since the laser beam is much larger than the ion beam, this was not an issue for measurements, which
have been performed during the last shifts.
The modified parameters of the stabilization system are attached. |
Mon Apr 11 14:45:11 2022, Paul, Konstantin, Sarper, David, Runs, Afternoon shift runs 11.04
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We continue scan the new wavelength scan range is 322.41 - 322.00 nm
Time | SIS-intensity | cooler-HV | LMD-DAQ1 file nr | LMD-DAQ2 file nr | scan range(nm) | step width(nm) | dwell time(s) | particles counted | comments
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14:45 | 1.9e9 | 209618 | 0189 | 7924 | 322.41 - 322.00 | 0.002 | 5s | 9100 |
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18:54 | 1.83e9 | 209616 | 0191 | 7926 | 322.41 - 322.00 | 0.002 | 5s | 7300 |
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19:34 | 1.7e9 | 209615 | 0192 | 7927 | 322.41 - 322.00 | 0.002 | 5s | 7110 |
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20:13 | 1.8e9 | 20961X | 0193 | 7928 | 322.41 - 322.00 | 0.002 | 5s | 6730 |
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20:53 | 1.8e9 | 209614 | 0194 | 7929 | 322.41 - 322.00 | 0.002 | 5s | 7550 | During the scan the ecooler voltage changed to approximately 209613
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21:43 | 1.7e9 | 209614 | 0195 | 7931 | 322.41 - 322.00 | 0.002 | 5s | 7000 |
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22:30 | 1.6e9 | 209612 | 0197 | 7932 | 322.41 - 322.00 | 0.002 | 5s | 7300 |
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23:10 | 1.4e9 | 209614 | 0198 | 7933 | 322.41 - 322.00 | 0.002 | 5s | 6100 | For this measurement, ESR_Ring went red, we realized only after completing the measurement. The sections went red are Dipole Correction Points (GE01KP17-18-19-20, 4 in total) @~23:45 and fixed @01:35...
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01:52 | 1.6e9 | 209614 | 0199 | 7934 | 322.41 - 322.00 | 0.002 | 5s | 7151 |
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02:32 | 1.7e9 | 209616 | 0200 | 7935 | 322.41 - 322.00 | 0.002 | 5s | 8368 |
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03:22 | 1.8e9 | 209617 | 0201 | 7936 | 322.41 - 322.00 | 0.002 | 5s | 7005 |
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04:01 | 1.9e9 | 209616 | 0202 | 7937 | 322.41 - 322.00 | 0.002 | 5s | | Ecooler voltage increased 4 volts during the run
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Mon Apr 11 12:50:22 2022, Kristian, Accelerator, Th lifetime
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We used the counter to measure the lifetime. During the 30 min scan time dropped only slowly.
During a longer break, e.g., when the laser flash lamps are changed, one could take data over a longer time. |
Mon Apr 11 11:05:35 2022, Sebastian, Kristian, Laser, Check laser power
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we checked the UV laser power at 10:15 am. It was only 8.5 - 9 mJ. Pumping power was 460 mJ, which is the maximum output of the current system. We should change the flashlamps soon |
Mon Apr 11 10:31:07 2022, Kristian, Sebastian, Alexandre, Danyal, Paul, General, new laser wavelength scan range 322.41 - 322.00 nm
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new wavelength scan range is 322.41 - 322.00 nm
at 10:31
Time | SIS-intensity | cooler-HV | LMD-DAQ1 file nr | LMD-DAQ2 file nr | scan range(nm) | step width(nm) | dwell time(s) | particles counted | comments
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10:31 | 1.75e9 | 209617 | 0180 | 7915 | 322.41 - 322.00 | 0.002 | 5s | 2300 | ABORT ... no laser ... beam stabilization was off |
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10:40 | xxe9 | 209617 | 0181 | 7916 | 322.41 - 322.00 | 0.002 | 5s | xxx | ABORT ... laser did not start from 322.41 nm |
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10:42 | xxe9 | 209615 | 0182 | 7917 | 322.41 - 322.00 | 0.002 | 5s | xxx | ABORT ... laser did not start from 322.41 nm |
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10:45 | 2.1e9 | 209616 | 0183 | 7918 | 322.41 - 322.00 | 0.002 | 5s | 9236 | HV E-cooler fluctuates slowly over 3 V |
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11:22 | 1.7e9 | 209616 | 0184 | 7919 | 322.41 - 322.00 | 0.002 | 5s | xxx | |
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12:02 | 2.0e9 | 209616 | 0185 | 7920 | 322.41 - 322.00 | 0.002 | 5s | 9660 | |
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12:43 | 1.8e9 | 209618 | 0186 | 7921 | 322.41 - 322.00 | 0.002 | 5s | 6533 | HV E-cooler jump to ~209700k for ~10 seconds and than back to 209618 |
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13:24 | 2.0e9 | 209617 | 0187 | 7922 | 322.41 - 322.00 | 0.002 | 5s | 9500 | |
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14:05 | 2.0e9 | 209618 | 0188 | 7923 | 322.41 - 322.00 | 0.002 | 5s | 9220 | |
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Mon Apr 11 10:17:01 2022, Danyal, Accelerator, Interlock - reset
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10:17
Wie heutemorgen in der Sitzung (morning briefing) vereinbart,
führt Herr Florenkowski einen Interlock und danach einen Reset von E02MK durch.
Das dauert nur ca. 15 min.
nach dem interlock wurde der ESR "rot"
Um 10:21 war das problem gelöst und der ESR war wieder "blau" |
Mon Apr 11 07:54:37 2022, Danyal, Alexandre, Kristian, Sebastian, Accelerator, Jump in E-cooler voltage
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We saw a jump in the E-cooler voltage at about 7:50.
jump from 209619 to 209610 V
At 7:56 it jumped back to 209619 V
seems stable now |
Mon Apr 11 04:26:53 2022, Patrick, DAQ, Next wavelength range
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Measurements with the next wavelength scan range should be started roughly around 10:00 am.
The next wavelength scan range is planned to be 322.41 - 322.00 nm, again with a step size of 0.002 nm, 5s dwell time and 2 loops.
This range includes roughly a third of the first scan range. |
Sun Apr 10 22:47:05 2022, Patrick, Volker, Prannay, Danyal, Alexandre, Sebastian, Kristian, Runs, Runs night shift 10.04 + morning shift 11.04
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These are the measurement runs of the night shift (10/11.04.).
Wavelength range is still 322.81 - 322.40 nm.
Time | SIS-intensity | cooler-HV | LMD-DAQ1 start-end | LMD-DAQ2 start-end | scan range(nm) | step width(nm) | dwell time(s) | particles counted | comments
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23:05 | 1.75e9 | 209620 | 0165 - 0165 | 7901-7901 | 322.81 - 322.40 | 0.002 | 5s | 8500 |
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23:57 | 1.?e9 | 209620 | 0166 - 0166 | 7902-7902 | 322.81 - 322.40 | 0.002 | 5s | 8500 | The HV of PMT south was changed from 2.5kV to 3kV
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00:35 | 1.4e9 | 209620 | 0167 - 0167 | 7903-7903 | 322.81 - 322.40 | 0.002 | 5s | 4100 |
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01:18 | 1.75e9 | 209620 | 0168 - 0168 | 7904-7904 | 322.81 - 322.40 | 0.002 | 5s | 4400 |
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01:58 | 1.4e9 | 209620 | 0169 - 0169 | 7905-7905 | 322.81 - 322.40 | 0.002 | 5s | 7700 | The ESR went red after this run. The on-call service was called because of some power supply failure, ETA: 45min.
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04:12 | 1.75e9 | 209620 | 0171 - 0171 | 7906-7906 | 322.81 - 322.40 | 0.002 | 5s | 7600 | With the start of this run, the wavemeter, labview and the python script were restarted. The python script was slightly adjusted.
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04:50 | 1.6e9 | 209620 | 0172 - 0172 | 7907-7907 | 322.81 - 322.40 | 0.002 | 5s | 8300 |
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05:31 | 1.6e9 | 209619 | 0173 - 0173 | 7908-7908 | 322.81 - 322.40 | 0.002 | 5s | 8100 |
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06:09 | 1.6e9 | 209615 | 0174 - 0174 | 7909-7909 | 322.81 - 322.40 | 0.002 | 5s | 8000 |
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06:52 | 1.8e9 | 209615 | 0175 - 0175 | 7910-7910 | 322.81 - 322.40 | 0.002 | 5s | 8800 | at 07:08 the cooler voltage jumped from 209615 V to 209619 V
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07:30 | 1.9e9 | 209619 | 0176 - 0176 | 7911-7911 | 322.81 - 322.40 | 0.002 | 5s | forgotten | at 07:50 the cooler voltage jumped from 209619 to 209610 V and back again at to 209619 V
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08:18 | 1.8e9 | 209619 | 0177 - 0177 | 7912-7912 | 322.81 - 322.40 | 0.002 | 5s | 9100 | 08:47 the cooler voltage jumped from 209618 to 209614 V and back again at to 209618 V
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08:55 | 1.75e9 | 209619 | 0178 - 0178 | 7913-7913 | 322.81 - 322.40 | 0.002 | 5s | 8300 |
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09:36 | 1.6e9 | 209619 | 0179 - 0179 | 7914-7914 | 322.81 - 322.40 | 0.002 | 5s | 8194 |
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The SIS intensity is taken directly before injection to ESR. Not the SIS peak intensity as in yesterday's table. |
Sun Apr 10 15:29:53 2022, Rodolfo, Laser, Status - Laser system
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We have checked the laser system.
- The pump laser has ~ 23Mio shots. The total output energy has dropped to about 475 mJ. Maybe it is time to install new fresh flashlamps. In case the accelerator is going to have any mantainance tomorrow (Monday) then we can take the oportunity to exchange the flashlaps.
- The dye laser is pumped with 470 mJ (angle of lambda/2 plate = 112°).
- The energy after the second harmonic is 11,3 mJ @ 646 nm. We are using the Sarper's calibration table (635 nm - 646 nm) |
Sun Apr 10 15:29:37 2022, Carsten,Sarper, Accelerator, Ecooler failed
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Ecooler failed @15:23 Carsten is fixing it
Fixed @16:00 |
Sun Apr 10 15:16:19 2022, Carsten, Rodolfo, Sarper, Runs, Runs afternoon shifts 10.04
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These are the measurement runs of the afternoon shift (10.04.).
Wavelength range is changed from 323.2 - 322.8 nm to 322.81 - 322.40 nm.
Time | SIS-intensity | cooler-HV | LMD-DAQ1 start-end | LMD-DAQ2 start-end | scan range(nm) | step width(nm) | dwell time(s) | comments
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16:26 | 1.95e9 | 209620 | 0155-0155 | 7891-7891 | 322.81 - 322.40 | 0.002 | 5s | laser scan did not work, labview (Thorium_main.vi) communication issue
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16:51 | 1.8e9 | 209620 | 0156-0156 | 7892-7892 | 322.81 - 322.40 | 0.002 | 5s |
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17:33 | 1.6e9 | 209618 | 0157-0157 | 7893-7893 | 322.81 - 322.40 | 0.002 | 5s | 7894 particles on the counter
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18:17 | 1.6e9 | 209618 | 0158-0158 | 7894-7894 | 322.81 - 322.40 | 0.002 | 5s | 8200 particles on the counter
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19:06 | 1.8e9 | 209618 | 0159-0159 | 7895-7895 | 322.81 - 322.40 | 0.002 | 5s | 8650 particles on the counter
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19:44 | 1.9e9 | 209618 | 0160-0160 | 7896-7896 | 322.81 - 322.40 | 0.002 | 5s | 8600 particles on the counter
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20:24 | 1.7e9 | 209620 | 0161-0161 | 7897-7897 | 322.81 - 322.40 | 0.002 | 5s | 4200 particles on the counter
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21:04 | 1.7e9 | 209619 | 0162-0162 | 7898-7898 | 322.81 - 322.40 | 0.002 | 5s | 8380 particles on the counter
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21:45 | 1.8e9 | 209619 | 0163-0163 | 7899-7899 | 322.81 - 322.40 | 0.002 | 5s | 8550 particles on the counter
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22:24 | 1.8e9 | 209619 | 0164-0164 | 7900-7900 | 322.81 - 322.40 | 0.002 | 5s | 8016 particles on the counter |
Sun Apr 10 15:08:42 2022, Carsten, DAQ, Backup of Data from 1rst Scanrange to extrenal RAID1 HDDs
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I just performed a backup of all data (+log-Files) that were collected until now to the two RAID HDDs.
For DAQ1: /media/sdc2 - last file 229Thor7889.lmd. Please note, that the naming sceme on DAQ1 is inconsistent - please look for the filenumnbering
For DAQ2: /media/sdd2 - last file 229Th0153.lmd |
Sun Apr 10 13:17:53 2022, Kristian, Max, DAQ, Wavemeter readout
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We changed the Labview code in order to reduce the amount of data that was overfilling the WM data queue. We removed the temperature and intensity values and added an additional 250ms wait.
We have the same wait in the Krypton VI and believed that it also slowed down the WM reading but this was obviously not the case.
Everything seems to work fine now!
Starting with the .lmd files 0151 / 7887 also the WM reading values are correct |
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