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| Nuclear hyperfine mixing in 229Th89+ |
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Message ID: 143
Entry time: Thu Apr 7 19:13:26 2022
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| Author: |
Konstantin, Patrick |
| Category: |
Calibration |
| Subject: |
How to find the correct laser position |
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In order to achieve the correct laser ion beam superposition one needs to do the following steps:
- If the laser stabilization is still running, turn both stages off and block the main amplifier.
- Ensure that the laser spot is centered on the paper screen, which is located in top of the laser tower in the south (ATTENTION: please only use the preamplifier and not the main amplifier!!! If you're unsure what you are doing please contact Rodolfo or Konstantin).
- If this is not the case and the beam is completely off, have a look at the MRC Stabilization system. If it is running, close the software and turn the hardware off and on again. The spot will leave its position and come back after the stabilization is turned on again.
- If it is still not centered, use and only use the piezo mirror (the one with red screws) to bring back the spot.
- Remove the paper screen and then turn on the main amplifier.
- Restart the software and put in the values from the file 07-04-2022(...).png. Start the two stabilization stages in the software. The laser spot should move back to the correct position.
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