peter.king@LIGO.ORG - posted 04:50, Tuesday 30 January 2018 - last comment - 05:36, Tuesday 30 January 2018(40326)
Increased DB1 diode current
This morning the main laser screen reported an output power of ~152 W. This is significantly down from yesterday's value of
~180 W. Decided to increase the diode current of DB1 to the maximum. The reported power jumped up by ~20 W.
Other fine tuning might prolong the inevitable.
I adjusted the diode temperatures for DB1 a little. The power indicated on the MEDM screen went from 135.3 W to 141.3 W. The Beckhoff main screen indicates a power of ~184 W. D1 is 27.0 degC, was 24.5 degC D2 is 27.7 degC, was 24.5 degC D3 is 22.5 degC, was 21.5 degC D4 is 23.5 degC, was 23.5 degC D5 is 22.5 degC, was 23.0 degC D6 is 27.5 degC, was 24.5 degC D7 is 24.5 degC, was 24.5 degC Altering the temperature of D3 does not do much. D3 is pretty much dead in my opinion.