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Reports until 16:32, Wednesday 03 March 2021
H1 TCS
camilla.compton@LIGO.ORG - posted 16:32, Wednesday 03 March 2021 (58074)
HWS ITMY SLED swapped, Ring Heater tests tonight.

WP 9434 

Following the proedure in T1500193 and with TJ remote help, the HWS ITMY SLED was swapped this morning. This happened before the PSL light pipe was opened so we stayed in Laser safe.

Old SLED QSDM-840-5 S/N 07.14.266, chnaged to new S/N 11.17.126 (ICS link with data sheet). This SLED swap was not unexpected as it was last swapped 2017 (alog 41411) and they have expected lifespans of ~8 months.

The old reported SLED PD power was 1.13e-3mW, new is 2.71mW. Set current set to 123.5mA (95% of max current 130mA). HWS photos are attached with and without plate.

We plan to do ring heater tests for centering tonight: 0.5W on ITMY 12 midnight to 3am using automated timing script: /opt/rtcds/userapps/release/tcs/common/scripts/power_adj_scripts >> python3 ring_heater_schedule.py ITMY -s 1298880018 -d 3 -p 0.5

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