Today, Daniele and I cleaned mirrors one by one using pure water, alcohol, and the spin coater. Here are the measurements of finesse each time:
1. Initial value: 14,076
2. Clean Mirror 2: 20,606
3. Clean Mirror 4: 18,750
4. Clean Mirror 3: 18,762
5. Clean Mirror 1: 18,563
6. Reclean Mirror 4: 15,226 (unstable lock)
7. Reclean Mirror 4 again: 16,563 (unstable lock)
The finesse reached a maximum of 20,606 but finally was down. For the last two measurements, the locking state was unstable and noisy. Tomorrow we will optimize the locking status and re-measure.
| Xinyi Lu wrote: |
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- Today we cleaned the environment and put the spin coater and microscope inside the airflow.
- Tomorrow, Daniele and I will clean the mirrors one by one using pure alcohol and water, and measure the finesse each time. If it does not improve, we will clean them with plasma.
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