aLIGO LHO Logbook

H1 PSL (PSL)

peter.king@LIGO.ORG - posted 13:47, Tuesday 05 July 2016 - last comment - 13:59, Tuesday 05 July 2016(28160)

Front end laser epilogue

As per alog entry 28145 a pair of diodes in the
front end laser were MIA this morning.  Suspect it was due to a faulty Beckhoff terminal as this terminal did not light up
with the front end diode box on.  We replaced the front end diode box and the corresponding module does light up.

    The SMA fibre connectors were all tweaked to maximise the diode power.  The fibre connectors were examined with an
infrared camera, typical temperatures were about 25-26 degC.

    The laser is up and running.  Should be okay for the engineering run.  We will need to tweak things after the run
however.




  Jason, Peter

Comments related to this report

peter.king@LIGO.ORG - 13:59, Tuesday 05 July 2016 (28163)

Link

I forgot to mention that the relock counter for the injection locking was reset in Beckhoff.
Currently reads at 1.

Front end operating hours currently reads 32319 hours, even though the front end diode box
is new.