Reports until 11:25, Monday 17 February 2014
H1 SEI
hugh.radkins@LIGO.ORG - posted 11:25, Monday 17 February 2014 (10122)
SEI Status mid morning Monday--All on sans BS-ISI

All the SEIs are operating as left Friday evening except the BS.

The BS ISI is tripped with a GS13 trip at 1076474647 followed by an Actuator limit trip 44 seconds later.  So this ISI only lasted for a few hours (til 2043 pst Friday evening.)  The watchdog plotting tools are not functional at this time, and its a holiday.

Taking the ISI back up, I see the current location and target for Rx is a mear 900nrads but this is too much tilt to start with the Trilliums in the loop.

Can a ISC/PRMI Commissioner confirm that we must servo to this value?  Certainly would make getting the IS back on easier if we could reset these targets.

So going up with the 250mHz blends ( with the T240 watchdog trigger level increased the second time.)  Have moved the Stage1 to nominal blends (T250 everywhere with the T100.44NO for X & Y)  Stage2 is also on with the 250mHz blends.  I notice the signal for Z is large on stage2 so I've turned off the Z boost.  It still has some pretty large swings though...  Seems to be some large low frequency oscillation comes and goes.  Will still likely trip I'm thinking.  If it doesn't hold maybe the blend shold be moved back to 750s.  I know Jim is still working on the loops here.

I was starting to see the Epics readouts for the output filters get into the 1000s for the horizontals (already doing the vertical s for a while,) so I switched Stage2 to the 750mHz blends.  This certainly reduced these readback's magnitude right away.  I've reenabled the Z boost now as a result.

I'll leave the ISI at this for the moment: Stage2 Lvl2 with 750mHz blend, Stage1 is Lvl2 with T100mHzNO.44 blends on X & Y and T250mHz elsewhere.  Sadly, the BLRMS needs a lot more green.