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| Nuclear hyperfine mixing in 229Th89+ |
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Message ID: 222
Entry time: Tue Apr 12 21:56:54 2022
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| Author: |
Volker, David, Pierre-Michel & Danyal, Alexandre, Sebastian |
| Category: |
General |
| Subject: |
new laser wavelength scan range 321.62 - 321.10 nm |
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New wavelength scan range is 321.62 - 321.10 nm. Before the new scan range (compare old scan range in Entry 215) was applied,
the cooler settings were slightly modified. Current was changed from 50 mA to 40 mA, correction voltage was changed from 3943 V to 3948 V. Additionally, the positions
of scraper NA was changed from -10 mm to -8 mm and scraper NI from +10 mm to +8 mm.
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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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21:57 | 1.55e9 | 209621 | 0226-0227 | 7962 | 321.62 - 321.10 | 0.002 | 5s | 7835 |
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22:54 | 1.4e9 | 209612 | 0228 | 7963 | 321.62 - 321.10 | 0.002 | 5s | 3326 | PMT south voltage reduced to 2400 V before run, Threshold now 80, Cooler Voltage changed to 209628 V at 23:19
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23:45 | 2.0e9 | 209628 | 0229-0230 | 7964 | 321.62 - 321.10 | 0.002 | 5s | 8560 |
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00:34 | 1.7e9 | 209626 | 0231 | 7965 | 321.62 - 321.10 | 0.002 | 5s | 7169 |
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01:29 | 1.1e9 | 209624 | 0232 | 7966 | 321.62 - 321.10 | 0.002 | 5s | 6412 |
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02:19 | 1.75e9 | 209626 | 0233 | 7967 | 321.62 - 321.10 | 0.002 | 5s | 7590 |
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03:06 | 1.6e9 | 209630 | 0234 | 7968 | 321.62 - 321.10 | 0.002 | 5s | 6329 |
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03:58 | 1.7e9 | 209629 | 0235-0236 | 7969 | 321.62 - 321.10 | 0.002 | 5s | 7710 |
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04:43 | 1.8e9 | 209629 | 0237 | 7970 | 321.62 - 321.10 | 0.002 | 5s | | Electron cooler went red @04:48
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05:48 | 1.5e9 | 209623 | 0238 | 7971 | 321.62 - 321.10 | 0.002 | 5s | 9420 |
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06:42 | 1.6e9 | 209616 | 0239 | 7972 | 321.62 - 321.10 | 0.002 | 5s | 8250 |
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07:32 | 1.7e9 | 209621 | 0240 | 7974 | 321.62 - 321.10 | 0.002 | 5s | 8840 | file 7943 was started accidentally too early and killed
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08:22 | 1.85e9 | 209622 | 0241 | 7975 | 321.62 - 321.10 | 0.002 | 5s | | ABORTED: laser did not start scanning
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08:33 | 1.90e9 | 209624 | 0242-243 | 7976 | 321.62 - 321.10 | 0.002 | 5s | 9955 |
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09:23 | 1.7e9 | 209624 | 0244-0245 | 7977 | 321.62 - 321.10 | 0.002 | 5s | 9021 | 09:50 Ecooler 12V drop for a few seconds; 9:52 again 12V E-cooler drop
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10:12 | 1.85e9 | 20962x | 0246 | 7978 | 321.62 - 321.10 | 0.002 | 5s | 8067 |
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11:10 | 1.7e9 | 209615 | 0247-248 | 7979 | 321.62 - 321.10 | 0.002 | 5s | 8905 |
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11:59 | 1.94e9 | 209612 | 0249-0250 | 7980 | 321.62 - 321.10 | 0.002 | 5s | 8203 | drop in E-cooler voltage of 8V at about 12:16 (before there was a slow increase from .612 to .620)
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12:48 | 2.0e9 | 209612 | 0251-0252 | 7981 | 321.62 - 321.10 | 0.002 | 5s | 8018 | E-cooler is not very stable (varies between .604 and .613) ; ~13:18 E-Cooler 18V jump to 209622V
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13:36 | 1.7e9 | 209621 | 0253 | 7982 | 321.62 - 321.10 | 0.002 | 5s | 8170 |
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