aidan.brooks@LIGO.ORG - posted 13:11, Saturday 07 February 2015 - last comment - 13:32, Saturday 07 February 2015(16554)
ITM RH resistivity measurement for acceptance testing
I ran the ITM RHs for twenty minutes at 2W total input power this morning to measure the resistance of the segements and the change in resistance vs time due to an increase in temperature of them. This is to confirm they are working as part of the acceptance testing.
The resistance of the RH segments was around the nominal value of 42 Ohms:
- ITMX UPPER = 43.9 Ohms
- ITMX LOWER = 42.3 Ohms
- ITMY UPPER = 40.7 Ohms
- ITMY LOWER = 42.4 Ohms
The relative resistance vs time is shown in the attached plot. There is some (~20%) variation between the different segements.
Non-image files attached to this report
Comments related to this report
The RH RTDs over the same time show that ITMX RH RTD is not working, whilst ITMY RH RTD is working.
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