Elli, Greg, Nutsinee

The ITMY HWS return SLED beam is slightly clipped at the moment so we are testing to see whether or not the HWS sees the similar result to alog14698 before we move on to do CO2Y alignment work. Elli turned on the ITMY HWS camera yesterday morning to let it warm up. We ran the HWS script this afternoon before and after turning on the ITMY ring heater for >30 mins (the ring heater was turned on at 21:42:18 UTC). We didn't see any significant changes in spherical power, prism X, or prism Y. We also tried to run the script on ITMX HWS to see if we could get any result but the return beam was so dim that the script crashed after taking 50 sample of centriods ("Not enough unique sample points specified"). We turned everything off and called it a day. Hopefully we can work on ITMY HWS optics alignment tomorrow.