Displaying reports 51061-51080 of 86129.Go to page Start 2550 2551 2552 2553 2554 2555 2556 2557 2558 End
Reports until 11:14, Monday 08 May 2017
H1 PSL
nutsinee.kijbunchoo@LIGO.ORG - posted 11:14, Monday 08 May 2017 (36087)
weekly PSL status report

Laser Status: SysStat is good Front End Power is 34.06W (should be around 30 W)

HPO Output Power is 166.6W

Front End Watch is GREEN

HPO Watch is GREEN

PMC: It has been locked 0 days, 9 hr 50 minutes (should be days/weeks)

Reflected power = 16.83Watts

Transmitted power = 61.71Watts

PowerSum = 78.55Watts.

FSS: It has been locked for 0 days 3 hr and 10 min (should be days/weeks)

TPD[V] = 3.199V (min 0.9V)

ISS: The diffracted power is around 3.5% (should be 3-5%)

Last saturation event was 0 days 3 hours and 11 minutes ago (should be days/weeks)

Possible Issues: See alog36080

H1 CDS (TCS)
filiberto.clara@LIGO.ORG - posted 10:47, Monday 08 May 2017 (36086)
Hartmann Table Cabling Disconnected

All field cabling going into the enclosure have been disconnected. Only thing to note, cables connected to the Polarization PD Whitening Field Box inside the enclosure do not have a feedthrough panel. Signal cable had to be disconnected from inside the table and pulled out. Cable is labeled H1:Polar_Pos_ADC_1. 

The following chassis inside of TCS-R1 rack were powered off:
1. Hartmann Sensor Power Distribution D1002206
2. TCS SLED Driver D1200614

LHO General
corey.gray@LIGO.ORG - posted 08:21, Monday 08 May 2017 - last comment - 08:21, Monday 08 May 2017(36079)
OWL Operator Summary

TITLE: 05/08 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
INCOMING OPERATOR: Nutsinee
SHIFT SUMMARY:
PSL recovery & a little tough to get locked (but not that bad).  Rest of the shift was normal running.  H1 was then promptly taken down at the end of the shift & I handed off "May Vent" tasks to Nutsinee.  I covered the Ops Station briefly while Nutsinee shuttered PSL pipes and she locked out the TCS lasers.  Now she is taking over Ops.

It's looking like I wrote over my Transition alog here (hence the subentries attached to this).....a sleep-deprived mistake.  :-/

LOG:

Comments related to this report
corey.gray@LIGO.ORG - 00:59, Monday 08 May 2017 (36082)
Link

Broke lock at LOWNOISE_ESD_ETMY!  :(

corey.gray@LIGO.ORG - 01:09, Monday 08 May 2017 (36083)
Link

Just A Note:  PRMI_2_DRMI_TRANSITION hasn't worked for me the last two times I've tried.  (DRMI did lock up last time.)

LHO General (PEM, SEI)
corey.gray@LIGO.ORG - posted 05:17, Monday 08 May 2017 (36085)
7-10 Hz Noise in LVEA Tonight

On the 3-10 & 10-30Hz Seismic BLRMS there was a noticeable period of elevated seismic noise in the LVEA from roughly 3:15-4:00utc.  (On attached screenshot, the Seismic screenshot shows this period from -9 to -8hrs.).

Power spectra of LVEA seismometers & accelerometers show a comb of peaks during this noisy period primarily between 7-8Hz.

Images attached to this report
H1 AOS
corey.gray@LIGO.ORG - posted 02:30, Monday 08 May 2017 (36084)
9:12 Back to OBSERVING

4:46 - 9:12 CORRECTIVE MAINTENANCE due to PSL Trip (see 36078 & 36080)

Spent a couple of hours trying to get back to OBSERVING.  Early issues with alignment noted in my Transition alog.  

Troubles in latter steps of locking.  Not certain of what the issue was.  On third (& successful) attempt, I paused at various points to check Bounce, Roll, & Violin modes.  Ultimately did not take action.

Around VIOLIN MODE DAMPING1, ASC Pitc signal gets noisy (coinciding with tidal signals for ALS x & y REFL control).  Also see ASC SRC1_Y_INMON drifting down (But reduce rf9 took care of this).

Upon getting to NLN, had a few (small, i.e. e-11 & smaller) SDF diffs (attached) related to pointing slider offsets & HEPI BS setpoints.  I simply REVERTED them.

Images attached to this report
H1 PSL
jason.oberling@LIGO.ORG - posted 00:48, Monday 08 May 2017 - last comment - 11:17, Monday 08 May 2017(36080)
PSL 2017-5-8 Trip Early Forensics

Reported here by Jim.  This trip was caused by the 35W FE power watchdog tripping, there by shutting down the PSL.  It appears to have been caused by the NPRO shutting off.  Attachment 1 shows the output powers of the 35W FE and the HPO, as well as the power watchdogs for each laser.  It is clear that the FE watchdog trips several seconds before the HPO watchdog trips.  The second attachment shows the output power of the NPRO and the 35W FE power watchdog; it is clear the watchdog trip coincides with the NPRO shutting off.  At this time the cause of the NPRO shut-down is unclear.

The PSL itself was restarted without issue, but as Jim mentioned in his above-linked alog there was an issue relocking the ISS; this was resolved by locking the PMC (since the in-loop PD for the ISS is beyond the PMC, so if the PMC is unlocked, the ISS will not lock).  I had an issue with my remote login not being able to bring up a sitemap (command not found?), so I drove out to the site to investigate.  When I showed up onsite, the lock request for the PMC was OFF (this is obviously not the nominal configuration for a locked PMC).  When the laser was restarted I asked Jim if the PMC was locked and he indicated it was, but when I arrived onsite it was not.  Not sure what happened here.  I know there is a script responsible for turning the PMC and FSS off in the event of laser power loss, but I believe this script also turns them back on once power is restored; I will follow up with TJ, the script's author, about this functionality.  In the previous 2017 laser trips this issue has not been encountered (i.e. open the HPO external shutter and the PMC and FSS have locked right up, no further action required).  Maybe this script didn't quite work right this time?  At any rate, everything is functioning normally now and the IFO is currently relocking (engaging ASC as I type this).  I will investigate more in the morning, for now I'm going to try to get some sleep.

Images attached to this report
Comments related to this report
jason.oberling@LIGO.ORG - 00:53, Monday 08 May 2017 (36081)
Link

Submitted FRS 8049 for the PSL trip.

david.barker@LIGO.ORG - 11:17, Monday 08 May 2017 (36088)
Link

Jason's remote SSH execution of the MEDM sitemap highlighted a problem that some CDS accounts are missing the standard .profile (or .bash_profile) files in their home directories. I have corrected this by copying in the template .profile file into home directories of those affected accounts.

We will go through Jason's script problem with TJ.

H1 General
jim.warner@LIGO.ORG - posted 00:05, Monday 08 May 2017 (36078)
Shift Summary

TITLE: 05/08 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
INCOMING OPERATOR: Corey
SHIFT SUMMARY:
LOG:

It was quiet until a PSL watchdog trip broke the 30 hr lock. Called Jason ~5:00 UTC for remote help, but ISS wouldn't lock. He drove in, and it turned out the PMC wasn't requesting Lock. As soon as he hit that button, PMC locked and ISS locked. I didn't change the state of the PMC, so I don't know what happened here. Sad.  

We're back trying to lock now.
 

LHO General
thomas.shaffer@LIGO.ORG - posted 16:03, Sunday 07 May 2017 (36076)
Ops Day Shift Summary

TITLE: 05/07 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 59Mpc
INCOMING OPERATOR: Jim
SHIFT SUMMARY: Quiet shift, locked for over 24hrs. Range is still down at like 60Mpc, could be from the rising usiesm?
LOG:

H1 General
thomas.shaffer@LIGO.ORG - posted 11:42, Sunday 07 May 2017 (36077)
Ops Mid shift report

Locked for almost 20hrs but the range has been trending down slowly for the past ~10hrs, with the exception of Cheryl's IM alignment change ~5hrs ago.

Looking through the summary pages for clues, the only thing I could find are the strain seems a bit noisier around 12/13hz and the CAL accuracy ASD ratio seems to also be a bit worse as well. Roll modes don't see any higher than usual so I don't know where this 13hz noise is coming from, and the CAL ratio I'd guess is a most likely a symptom way down a chain that could have come from many places.

Images attached to this report
H1 General
cheryl.vorvick@LIGO.ORG - posted 08:05, Sunday 07 May 2017 (36074)
Ops Owl Summary:
LHO General
thomas.shaffer@LIGO.ORG - posted 08:03, Sunday 07 May 2017 (36073)
Ops Day Shift Transition

TITLE: 05/07 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 62Mpc
OUTGOING OPERATOR: Cheryl
CURRENT ENVIRONMENT:
    Wind: 13mph Gusts, 11mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.18 μm/s
QUICK SUMMARY: Going on 16hrs at 63Mpc.  Calm environment.

H1 General
cheryl.vorvick@LIGO.ORG - posted 06:03, Sunday 07 May 2017 - last comment - 13:10, Friday 26 May 2017(36071)
Ops Owl Mid-shift Update

H1 Status:

SITE:

Comments related to this report
sheila.dwyer@LIGO.ORG - 13:10, Friday 26 May 2017 (36452)
Link

Patrick Kiwamu and I reversed these IM moves this morning.  It looks like after this move the recycling gain dropped by about 2%, the reflected power dropped by about 13% (which is not necessarily a bad thing), and for some reason MC2 trans sum became more noisy.  I do not understand why MC2 trans sum would become more noise, the mode cleaner alignment didn't change during this time.

Right now we are having trouble locking because of low recycling gain, which is why we have reverted.  

Images attached to this comment
H1 General
jim.warner@LIGO.ORG - posted 00:04, Sunday 07 May 2017 (36070)
Shift Summary

TITLE: 05/07 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 64Mpc
INCOMING OPERATOR: Cheryl
SHIFT SUMMARY:
LOG:

Nothing much happened. Winds picked up for a little while, there was a small earthquake, both affected range some. 
 

LHO General
thomas.shaffer@LIGO.ORG - posted 16:00, Saturday 06 May 2017 - last comment - 07:47, Sunday 07 May 2017(36069)
Ops Day Shift Summary

TITLE: 05/06 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 67Mpc
INCOMING OPERATOR: Jim
SHIFT SUMMARY: One liock loss for an unknown reason. The PSL seem to struggle and the FSS would lose lock repeatedly so bringing it back up took a bit longer than usual.
LOG:

Comments related to this report
peter.king@LIGO.ORG - 07:47, Sunday 07 May 2017 (36072)
Link 

This is pure speculation on my part but if the input modecleaner is swinging around for whatever
reason - which means that it is pulling the laser frequency around - it might be that the
injection locking of the oscillator may have saturated.  Unfortunately there is no monitor of the
saturation status of the SR560 that was added to the injection locking servo.  But I have seen
occasions where the system indicates that it is locked but the SR560 red indicator light is on.

    A trend of the oscillator PZT output, or of its injection locking status at the time(s) that
the FSS is having a hard time might indicate this.

    The other reason might be that with the change of input modecleaner alignment, the alignment
onto the second loop ISS photodiode array may also have changed.
H1 General
thomas.shaffer@LIGO.ORG - posted 14:35, Saturday 06 May 2017 - last comment - 15:40, Saturday 06 May 2017(36067)
Lockloss @ 21:14 UTC

Not obvious cause. I will move the IM's back to where Cheryl suggested and then align and lock.

Comments related to this report
thomas.shaffer@LIGO.ORG - 15:40, Saturday 06 May 2017 (36068)
Link

Back to Observing at 22:39UTC

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