 Tue May 10 11:59:45 2022, Simon, Christopher, Kristian, Sebastian, Laser, Labview VI checkups
|
The lower limit (to position) of the Cobra control VI has to be one increment smaller.
This means for moving from 601,95 to 601,74 the "to position" has to be 601.735.
|
Tue May 10 15:26:35 2022, Rodolfo, Max, Laser, Laser stabilisation running 
|
It is now possible to stabilize and move the laser with both stages.
The software and hardware settings are attached.
|
|
Wed May 11 01:09:07 2022, Patrick, Sebastian, Volker, Guy, Laser, Beam overlap
|
We overlapped the laser with the ion beam.
The ion beam positions are:
|
|
Wed May 11 03:10:55 2022, Patrick, Sebastian, Volker, Guy , Laser, Laser - bunch timing
|
We added the delay and gate generator in between the bunch trigger and the CFD to move the timing of the PMT middle signal relative to the photodiodes north
and south.
The center value of PD-North is at 19 bins, PD-South at 55 bins, the middle is therefore at 37 bins. The PMT peak should be half a revolution, ie 75 bins |
|
Wed May 11 14:59:01 2022, Rodolfo, Laser, Laser status
|
I have measured the output energy of the laser system. All values in [mJ] and over 500 laser-pulses average
[TABLE border="1"]
|
|
Wed May 11 22:19:17 2022, Max, Wilfried, Volker, Laser, laser bunch timing
|
We overlapped the laser and ion bunch in the time domain. The delay has to be set on the module above the laser and NOT in the ESR Messhütte!
The values are:
|
|
Thu May 12 15:21:23 2022, Sebastian, Simon, Laser, Flash lamps changed
|
We (Sebastian and I) changed the flash lamps of the Quanta Ray Laser and measured the output energy of the laser system afterwards (still during warm up).
All values in [mJ] and over 500 laser-pulses average
|
|
Mon May 16 15:57:37 2022, Rodolfo, Laser, Wavemeter calibration
|
I have calibrated our Wavemeter WS7 using the temperature stabilized He-Ne Laser (SIOS EN60 825-1:2014). In the screenshots below you can see the readout
of the wavemeter before (vor) and after (nach) calibration. |
|
Mon May 16 21:08:48 2022, Rodolfo & Max, Laser, Laser power
|
We checked the energy of the laser and optimized it a bit
[TABLE border="1"]
|
|
Fri May 27 14:57:23 2022, Rodolfo, Laser, Laser Energy
|
I have started up the laser system (Q-Ray & Cobra) again. Here some parameters*:
- Q-Ray's output energy (@532 nm: 547 mJ.
|
|
Mon May 30 00:56:33 2022, Max, Patrick, Laser, Beam overlap
|
The ion beam positions are (+- 1mm):
|
|
Mon May 30 19:42:20 2022, Rodolfo & Kristian, Laser, Changing laser wavelength
|
We have changed the laser wavelength, e.g. the dye for the Cobra to Fluorescein 27.
We get about 84 mJ out the main amplifier @ 548 nm.
|
|
Tue May 31 03:18:52 2022, Patrick, Konstantin, Laser, Laser timing
|
The final timings are (in bins +-1):
PD NO: 103
|
|
Tue May 31 21:58:55 2022, Max, Rodolfo, Laser, MRC Settings for 209Bi
|
We have change the laser settings for the spectroscopy of 209Bi.
We have now T-scraped the laser beam to the old position of the ion beam. The settings for the MRC system are shown in the screenshot below. |
|
Wed Jun 1 17:20:04 2022, Rodolfo, Laser, HeNe @ WS7
|
| |
|
Fri Jan 13 17:05:22 2023, Rodolfo, Laser, Testing WS6
|
| Testing the new Wavemeter (HighFinesse, WS6, SN3950) with the QRAY laser light @ 532 nm. Multimode fiber von High Finesse:FC/PC S (Corning, MM, OM2) |
|
Wed Jan 18 13:02:12 2023, Rodolfo, Laser, Testing WS6 with Cobra
|
Testing the WS6 (S.N. 3950) together with the Cobra.
Cobra operated with dye DCM in Ethanol + DMSO (Concentration 1:1)
|
|
Tue Jun 6 09:33:00 2023, Rodolfo, Laser, Fiber coupler
|
| Cobra's new fiber-coupling unit for wavelength reading. |
|
Mon May 9 11:45:57 2022, Wilfried, Jon, Sebastian, General, HV Divider position & DMM calibration
|
We performed an autocalibration (attached picture 1) of the Keysight 34465A DMM (TUD Keysight).
The position and the "cabling" to the cooler platform was also adjusted (picture 2,3). |
|
Tue May 10 23:53:42 2022, Rodolfo, General, shift change
|
| The night shift took over. They are trying now to overlap the ion and laser beams. |