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 Thu Sep 5 16:59:36 2019, anchal, DailyProgress, BEAT, Beatnote Frequency long time series data 
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 Wed Oct 2 12:22:44 2019, anchal, DailyProgress, BEAT, Beatnote Frequency long time series data
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Tue Oct 8 16:48:07 2019, putInYourRealName, DailyProgress, BEAT, Beatnote Frequency long time series data
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Wed Oct 9 16:08:39 2019, anchal, DailyProgress, BEAT, Beatnote Frequency long time series data
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Message ID: 2449
Entry time: Wed Oct 9 16:08:39 2019
In reply to: 2448
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| Author: |
anchal |
| Type: |
DailyProgress |
| Category: |
BEAT |
| Subject: |
Beatnote Frequency long time series data |
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Whoever commented last, suggested a good idea. So I've here plotted the NPRO slow control voltage signals, converted into the inferred temperature of the cavities (see CTN:2415). I'm not so sure which CMRR the anonymous commentator is talking about. More clarification on that would be helpful.
Conclusions:
- As the anonymous commentator said, the ideal temperature difference between the cavities would be around 20 uK, but that is clearly not the case as North Cavity varies more than 0.1 K while the South Cavity is relatively more stable.
- This could also indicate that some external low-frequency noise source drifts the North Lasers frequency by corrupting the FSS.
- The thermal dynamics of the two cavities should be similar unless same driven current causes starkly different emission of heat from the coil heaters (which are supposedly of same length).
- Some more help in understanding these results are required, or atleast a person who can bounce back ideas with me.
- So the can upgrade might be useful afterall. If anything, it will reduce the mysteries related to the cavities locked inside there for the last 5 years.
Code and Data |
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