As Sheila pointed out, back in May we had a 25W lock that lasted >5h and never showed any indication of jitter peaks.
The attached plot 1 shows spectra from May 17 (25W), July 16 (40W) and Nov 3 (25W). Note that the May 17 spectrum is taken 4h into the lock.
Plot 2 shows inputy power and range of the May 17 lock.
Plot 3 shows all TCS settings of the May lock.
Plot 4 shows all TCS settings currently used.
Based on this, I would like to turn off the ITM ring heaters.
Yes, we should probably try this, and we will set them soon.
In the attached screenshot the red traces are from the short lock right before we turned on the ITM ring heaters on June 28th, the black traces are from a longer lock July 1st, and we do have worse noise at a few hundred Hz.
At this time we had the same ETM ring heater settings as now (1.5Watts on each), CO2X was at 0.4 Watts (we currently are at 0.2 but Kiwamu thinks it should be increased), and CO2Y was at 0.3W.
