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Entry  Wed Oct 30 01:56:38 2013, tara, DailyProgress, optic, table work oldPBS.jpgnewPBS.jpg
    Reply  Thu Oct 31 00:02:17 2013, tara, DailyProgress, Electronics Equipment, TTFSS offset.pngD040105C.png
       Reply  Thu Oct 31 18:10:07 2013, Evan, DailyProgress, Electronics Equipment, TTFSS 
       Reply  Sun Nov 3 19:37:32 2013, rana, DailyProgress, Electronics Equipment, TTFSS 
          Reply  Tue Nov 5 01:11:15 2013, tara, DailyProgress, Electronics Equipment, TTFSS 
             Reply  Wed Nov 6 01:14:58 2013, tara, DailyProgress, Electronics Equipment, TTFSS beat_2013_11_05.pngbeat_2013_11_05.fig
                Reply  Thu Nov 7 05:08:13 2013, tara, DailyProgress, NoiseBudget, photothermal noise in SiO2/Ta2O5 beat_2013_11_07.pngbeat_2013_11_07.fig
                   Reply  Wed Nov 20 18:19:01 2013, tara, DailyProgress, NoiseBudget, photothermal noise in SiO2/Ta2O5 beat_compare.pngbeat_compare.fig
Message ID: 1381     Entry time: Tue Nov 5 01:11:15 2013     In reply to: 1380     Reply to this: 1383
Author: tara 
Type: DailyProgress 
Category: Electronics Equipment 
Subject: TTFSS 

Quote:

 

 Do you guys have a plot that shows the required loop gain and the achieveable loop gain with this TTFSS on the same plot?

 Not yet, we will add this later. but we measured the noise at error point before and it is well below the estimated coating noise.

 

Plan for this week

Mon: (See Evan's entry for more detail)

  • minimize RFAM,
  • bring back the beat signal, optimized gain setup. A lot of improvement around 10 - 50 Hz.
  • measured error noise from each PDH loop, with slope of the error signal to calibrate it to frequency noise
  • measure RIN

Tue:

  • measure photothermal coupling from RCAV (may remeasure ACAV)
  • measure cavity pole, to check the cavities' finesses
  • check calibration on PLL

Wed

  • replace the broken air spring with a new one.
  • fix harmonic lines in the beat
  • update the calculation for the noise budget ( electronic noise, etc)
  • Turn on ISS

Thur

  • beat measurement
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