jeffrey.kissel@LIGO.ORG - posted 20:25, Thursday 18 May 2017 - last comment - 20:40, Thursday 18 May 2017(36279)
HVAC Upgrade vs. Suspensions -- The mid-upgrade Story at EX
J. Kissel, B. Gateley, Apollo Bubba and Apollo have been actively working on the upgrade of the EX HVAC system during the day today and will continue tomorrow, but since we've learn so much from EY (LHO aLOG 36271), I wanted to look at EX in the same light. No need to take any action other than planned thus far. Unfortunately it looks like, in the midst of the upgrade, EX is going to get even hotter than EY. The PCAL temperature sensors report a 4.1 [deg C] = 7.38 [deg F] change from where we were 5 days ago. As such, the suspensions are in quite a different place than when in observation. We look forward to the completion of the upgrade, but we should be aware that it will take quite some time for the SUS to recover.
Images attached to this report
Comments related to this report
J. Kissel
The relevant, functional temperature sensor channels for the XVEA are as follows:
Type Sub-System Channel Units Notes
Temp Sensor FMCS H0:FMC-EX_VEA_AVTEMP_DEG[C/F] [Celsius / Fahrenheit] Average of FMCS sensors below; error point for FMCS temp control servo
H0:FMC-EX_VEA_202A_DEG_[C/F] [Celsius / Fahrenheit]
H0:FMC-EX_VEA_202B_DEG_[C/F] [Celsius / Fahrenheit]
H0:FMC-EX_VEA_202C_DEG_[C/F] [Celsius / Fahrenheit]
H0:FMC-EX_VEA_202D_DEG_[C/F] [Celsius / Fahrenheit]
Temp Sensor PCAL H1:CAL-PCALX_TRANSMITTERMODULETEMPERATURE [Celsius] reports a few [deg C] higher temp because of the 2W laser inside
H1:CAL-PCALX_RECEIVERMODULETEMPERATURE [Celsius]
Temp Sensor CCG H1:PEM-EX_TEMP_VEA1_DUSTMON_DEGF [Fahrenheit]
Temp Sensor PEM H1:PEM-X_EBAY_RACK1_TEMPERATURE [Celsius] Heavily influenced by rack temperature, but shows gross trend
H1:PEM-X_EBAY_RACK2_TEMPERATURE [Celsius] Heavily influenced by rack temperature, but shows gross trend
Temp Sensor PEM H1:PEM-EX_TEMPERATURE_BSC9_ETMX_MON Uncalibrated!! Attached to BSC10 (ETMY's chamber)
Temp Sensor SEI H1:ISI-GND_BRS_ETMX_TEMPL Uncalibrated!! Inside the heavily insulated BRS enclosure
Disp. Sensor SUS H1:SUS-ETMX_M0_DAMP_V_IN1_DQ [um] -106 [um/(deg C)] LHO aLOG 15995
H1:SUS-ETMX_R0_DAMP_V_IN1_DQ [um] [um/(deg C)] is probably roughly the same as M0
H1:SUS-TMSX_M1_DAMP_V_IN1_DQ [um] -88 [um/(deg C)] LHO aLOG 15995
Disp. Sensor SUS H1:SUS-ETMX_M0_DAMP_P_IN1_DQ [urad] -270 [urad/(deg C)] LHO aLOG 15888
H1:SUS-ETMX_R0_DAMP_P_IN1_DQ [urad] [urad/(deg C)] is probably roughly the same
H1:SUS-ETMX_L1_WIT_P_DQ [urad] [urad/(deg C)] is probably less
H1:SUS-ETMX_L2_WIT_P_DQ [urad] [urad/(deg C)] is probably even less
(because it's -96 urad/(deg C) at the test mass)
H1:SUS-ETMX_L3_OPLEV_PIT_IN1_DQ [urad] shows pitch of ETM, but also sensitive to temperature itself
H1:SUS-TMSX_M1_DAMP_P_IN1_DQ [urad] [urad/(deg C)] hasn't been calculated yet.
I've created a dataviewer template with the above channels pre-selected for future ease of trending.
It now lives under version control here:
/opt/rtcds/userapps/release/pem/h1/dvtemplates/EXVEA_Temperature_Trends.xml
I attach the initial version, in case you don't want to remember where it lives.
Non-image files attached to this comment
