We had strange ring heater test results (alog62390) after the ETMX HWS alignment Vicky and I set last week. Today we tweeked the collimating lens alignment realigning the beam closer to the iries. We had moved away from the irises a little when trying to get rid of the ITM reflection. We also used the beam scan to ensure the beam was focusing ~100mm from the L2. Photos attached.
Vicky has set a 2W ETMX ring heater test for 8pm-2am tonight.
Looks like our exposure time was set too high during our ring heater test, see attached. We lowered it using serial_cmd (wiki link) but we finding that it kept getting reset to 1Hz. will look into which channel we need to use to specify camera sync frequency and exposure.