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David Notebook: Difference between revisions
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→Questions for Deniz
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==Questions for Deniz==
*When under vacuum, does it matter whether the cavity is cooled? Surely alignment will be slightly different, but just for getting the lock working well it would be easier to not have to add nitrogen all the time and to not have the cavity slowly warming up. '''No in principle, but it would probably change cavity mirror couplings and I don't want to have to adjust those and then change them back'''
*What's with the noise on the locking signal and DC error? Is that a problem? '''Fixed it--RF generator problem'''
*How much power do we typically transmit from 1555 when under vacuum? '''1W absolute best. 700-800 mW is pretty good'''
*Why do the locks drop in power--it doesn't usually lose a lock all of a sudden, but it will continuously decrease more or less (way more rapidly with the 1555) until no more power is being transmitted?
* Do we need integral and differential gain? Isn't error signal linear?
*Thoughts about why adjusting the phase delay line didn't seem to produce much effect on the error signal? '''Who knows. Ask Josh. This could be important, we should try to figure it out'''
==Daily Log==
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