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Nuclear hyperfine mixing in 229Th89+, Page 8 of 12

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ID	Date	Author	Category	Subject	Text
63	Sat Apr 2 05:08:00 2022	Kristian	General	Morning shift	I see no updates in the log. Is the morning shift taking place?
97	Tue Apr 5 13:24:40 2022	Kristian	Detectors	PMT Cu	HV cable was in wrong channel in power supply. Now it is back to the correct position. Checked connection at the PMT.
98	Tue Apr 5 13:28:06 2022	Kristian	DAQ	Spikes in PMT signal	Occasionally, we noticed a spike in the PMT signal. No ions in the ring and at PMT Cu was not even supplied with HV. Has to be
99	Tue Apr 5 14:51:51 2022	Kristian	DAQ	dark counts	We shielded the PMTs, i.e., the N2 tube, which improved the Cu PMT background rate.
160	Fri Apr 8 11:16:57 2022	Kristian	Laser	Wavemeter	We changed the fiber to the wavemeter. The third fiber worked best and we could operate the WM at low exposure times, i.e., below
163	Fri Apr 8 14:14:28 2022	Kristian	DAQ	Delay of bunch RF	The bunch HF is now fed through a delay to shift the stop trigger relative to the PMT signal. The delay generator is placed directly
182	Sat Apr 9 06:42:23 2022	Kristian	Laser	Laser step size	We changed the laser step size to 0.002 nm which corresponds to 5.75 GHz.
209	Mon Apr 11 12:50:22 2022	Kristian	Accelerator	Th lifetime	We used the counter to measure the lifetime. During the 30 min scan time dropped only slowly.
213	Mon Apr 11 22:14:51 2022	Konstantin, Sarper	Laser	Changing of the wavelength range	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.
143	Thu Apr 7 19:13:26 2022	Konstantin, Patrick	Calibration	How to find the correct laser position	In order to achieve the correct laser ion beam superposition one needs to do the following steps:
82	Sun Apr 3 18:41:11 2022	Konstantin and Rodolfo	Laser	Beam Position Stabilization	We (Konstantin and I) have optimized the TEM "laser-beam position stabilization".
40	Thu Mar 31 11:49:54 2022	Konstantin	Detectors	HV-Supply of particle detectors	We cross-checked the cabeling of the particle detectors north and south. Particle detector south is connected to channel [B]HV5[/B]
42	Thu Mar 31 15:53:50 2022	Konstantin	Detectors	Control software for XUV and copper mirror detector	> Attached you find a manual for the software used to control the movement of the XUV detector and the copper mirror detector.
43	Thu Mar 31 17:56:32 2022	Konstantin	DAQ	Photodiode test signal	We used a signal generator to provide a 4MHz dummy-RF signal. This was divided by a factor of 2 for laser-"bunch" synchronization and
58	Fri Apr 1 22:01:14 2022	Konstantin	Detectors	PMT operating voltages	> During the testing of the PMTs the following operating voltages were applied: >
83	Sun Apr 3 18:52:30 2022	Konstantin	Calibration	Laser ion beam overlap	We measured vertical and horizontal ion beam positions. Unfortunately, the horizontal scraper positions can not be manipulated
142	Thu Apr 7 16:50:22 2022	Konstantin	Calibration	Spacial laser-ion overlap	Laser-ion-beam overlap was achieved after measuring the ion beam positions (compare [URL=https://elog.gsi.de/esr/E142/83]Entry
169	Fri Apr 8 17:44:25 2022	Konstantin	Calibration	Final Timing	We measured the timing for the laser bunch synchronization. A summary is given below.
170	Fri Apr 8 17:57:45 2022	Konstantin	DAQ	Laser scanning	[TABLE border="1"]
221	Tue Apr 12 17:01:30 2022	Konstantin	Detectors	Voltage PMT North	Voltage of PMT North has been increased from 2500 V to 2600 V. Additionally the threshold was adapted from 25 mV to 12 mV.

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