nutsinee.kijbunchoo@LIGO.ORG - posted 05:27, Thursday 03 November 2016 - last comment - 06:00, Thursday 03 November 2016(31159)
Locklosses at Increase Power
There were no sign of anything going unstable. It's just dropped. I tried engaing the new PRC1 filter that Sheila removed from the Guardian as IFO goes to high power but it's still causing instability at that point.
Comments related to this report
nutsinee.kijbunchoo@LIGO.ORG - 06:00, Thursday 03 November 2016 (31160)
Guardian won't move on, got a message telling me to check fast shutter trigger. The "Fast Shutter Plot" button doesn't work so I manually made some plots following alog29689 (at least one DQ channel didn't exist so I picked something close). It seems to me like the shutter did not close during the last lockloss at Increase Power. I couldn't find an alog explaining how to clear this message and make Guardian move on again. I found an instruction on how to test fast shutter on H1 Troubleshooting page. Follow the instruction by selecting LOW_ARM_POWER on LOCKLOSS_SHUTTER_CHECK guardian (had to be done manually, there's no path from SHUTTER_FAIL to LOW_ARM_POWER). Then I selected TEST_SHUTTER on FAST_SHUTTER Guardian. And got a message "Fast shutter failed tests! Do not power up!!"
Guardian won't move on, got a message telling me to check fast shutter trigger. The "Fast Shutter Plot" button doesn't work so I manually made some plots following alog29689 (at least one DQ channel didn't exist so I picked something close). It seems to me like the shutter did not close during the last lockloss at Increase Power.
I couldn't find an alog explaining how to clear this message and make Guardian move on again.I found an instruction on how to test fast shutter on H1 Troubleshooting page. Follow the instruction by selecting LOW_ARM_POWER on LOCKLOSS_SHUTTER_CHECK guardian (had to be done manually, there's no path from SHUTTER_FAIL to LOW_ARM_POWER). Then I selected TEST_SHUTTER on FAST_SHUTTER Guardian. And got a message "Fast shutter failed tests! Do not power up!!"I think I broke the interferometer =(