For both PMC locking and injection locking, servo board and field box board were modified as per FRS 6500 (FRS id=6500 and alog 31047).

After the modified boards went in, we removed the 20dB attenuator on the PSL rack RF patch panel for 35.5MHz for PSL EOM.

This seems bump up the ILS and PMC length locking optical gain by about a factor of 10 (for ILS the analog gain was changed to compensate).

We also remeasured the demod phase for ILS and PMC length locking. For ILS we didn't see much change (1ns), but PMC was significant, we ended up changing 3ns, i.e. 39 degrees for 35.5MHz.

Demod setting are shown in the first two pictures, ILS (first attachment) and PMC (second). Third picture shows that the ILS is on the left bottom of the four delay lines, and PMC is on the right bottom.

The fourth picture shows the OLTF of PMC that is pretty close to the one we have now. Note that UGF is much much higher than before simply because of the optical gain and the demod phase (might have to change).

Unfortunately the floppy for SR785 failed, so we'll remeasure the ILS loop gain again tomorrow.

Robert called from EY to info me that he was going into the VEA area near the BRS

WP 6292

Installed Safety System Controls chasiss in MSR and LVEA chiller closet. Fiber is patched through MSR and LVEA patch panel (next to HAM 2). A new fiber was pulled from HAM2 to to the LVEA chiller closet. EtherCAT cable connecting to the EP1908 units (TwinSAFE digital inputs) was terminated. As of now, we are in a monitor state only.
 

(Patrick, Gerardo)

Degassed 2 nude ion gauges in the corner station, PT170 and PT180.  We did the degassing twice since the first time the degassing was terminated too early for both gauges, we sent second command before the 3 minutes were up, and it turns out that if you do send the command degassing stops.  As usual pressure went up to 10^-07 torr for both gauges while degassing then, trended down after.

Did not receive expected Grace test alert. Did receive SNEWS test alert at 16:03 UTC. TCSY laser tripped off around 15:52 UTC, cause unknown. Attempt to add an ADC card to h1oaf brought down the dolphin network and the TCS chillers. Bad Beckhoff terminals in corner chassis 3 found and replaced. Currently waiting for PSL work to complete.

Peter K in PSL enclosure
14:35 UTC Bubba to end X and end Y with Apollo to look at sensors. I set ISI config to VERY_WINDY_NOBRSXY.
14:37 UTC Hanford phone call notification of siren testing in 100K, 200E, 200W and 400 areas.
15:01 UTC Set IMC guardian to DOWN to disable MC locking per Peter's request
15:06 UTC Karen to end Y to clean
15:13 UTC Chris to escort pest control company to LVEA
15:23 UTC Mark P. to CER (WP 6246)
15:31 UTC Notification of remote login (Carlos)
15:32 UTC Jeff B. to LVEA West bay to look for 3IFO part and then to HAM3 clean room curtains
15:39 UTC Kyle to end X to run RGA scan
15:40 UTC Jim W. to end Y to recenter BRS
15:43 UTC Hanford phone call notification that siren testing is complete
15:43 UTC Joe to LVEA (eye wash stations, batteries)
15:46 UTC Jason to PSL enclosure
16:03 UTC SNEWS alert (test)
16:05 UTC Mat cleaning company through gate
16:09 UTC Gerardo and I finished degas of PT170 and PT180, but turned off the degas too soon.
16:22 UTC Gerardo to end X (WP 6290)
I restarted frozen video0
16:32 UTC Karen done at end Y
16:35 UTC Filiberto running fiber from HAM2 to chiller closet
16:35 UTC Betsy to LVEA West bay to store item on shelf and then to optics lab
16:45 UTC Kiwamu to LVEA to check TCSY front panel to diagnose laser trip
Dave to take down h1oaf frontend to add ADC card to IO chassis (WP 6287)
17:01 UTC LN2 delivery through gate
17:06 UTC Pratt electronics delivery for Richard through gate
17:07 UTC Betsy done
17:10 UTC Karen to LVEA to clean
17:12 UTC Joe done
17:14 UTC Hugh to end stations for weekly HEPI maintenance
17:20 UTC h1oaf frontend down. Dave to CER to add ADC card.
17:22 UTC Jeff B. done
17:25 UTC Pest control company done
17:45 UTC Jim W. back
17:48 UTC Richard to CER to check on Mark and LVEA to check on Filiberto
17:58 UTC Dave and Jim done in CER. h1oaf took dolphin network down.
18:07 UTC Bubba taking Apollo to LVEA to look at sensors
18:09 UTC Joe back to LVEA
18:10 UTC Dave and Jim removing ADC card that was added to h1oaf IO chassis
18:29 UTC Mark and Filiberto pulling Beckhoff corner chassis 3 from rack
18:32 UTC Ryan patching alog
18:33 UTC Dave rebooting guardian machine
18:39 UTC Hugh back
18:39 UTC Joe done
18:41 UTC Jeff restarted TCS chillers
18:43 UTC Hugh to HAM2 to plug STS2 back in
18:49 UTC Dave to end X
18:53 UTC Hugh back
18:54 UTC Chris opening rollup door for cardboard
19:11 UTC Gerardo done
19:12 UTC Dave back from end X
19:38 UTC Cheryl opening/closing ALS shutters from new medm screen
19:51 UTC Jim W. to end Y
20:32 UTC Set ISI back to VERY_WINDY_NOBRSXY again from INIT.
20:32 UTC Hugh taking HAM2 down
20:58 UTC Jim W. back
21:02 UTC Mark P. to mid Y to get parts
21:05 UTC Started degas of PT170
21:09 UTC Kyle back
21:10 UTC Stopped degas of PT170
21:11 UTC Started degas of PT180
21:15 UTC Stopped degas of PT180
21:47 UTC Mark done fixing Beckhoff chassis 3. TCS chiller flows are back.
21:51 UTC Gerardo to LVEA to turn on TCS lasers
21:58 UTC Filiberto to LVEA to continue WP 6292

Compressors #1 and #2 were greased and pressure tested.

Compression test results:  #1 at 135 psi, and #2 at 125 psi.
All compressors and electrical motors were greased.

Replaced the pressure relief valve for compressor #2, the valve for compressor #1 was OK and it passed its test.

All compressor assemblies were run tested after service was performed.

Work performed under WP#6290.

After some confusion in understanding who did what, here is the actual history of what transpired this morning in TCS land:

~9am  TCSY mystery laser-off issue (alog 31064) - chillers all reporting ok, easy restart of laser at panel by Kiwamu.  I add water to TCSY and log for the day.

~Shortly after 9am CDS performs OAF model work, which does something bad to the dolphin network, sending both TCSX and TCSY chillers into FAULT.

~Dave looks at chiller front panels and finds fault, sends Jeff B. to clear fault.  Jeff does so and adds another 250mL of water to chiller (didn't know I had already been there).

~12:30-1:30pm discover TCSX and TCSY lasers at 0.  Chillers look ok, determine it is a Beckhoff issue which is reporting errors.

~2:45pm EE fixed issue with some Beckhoff board (alog 31081 below).

Lasers back.

M. Pirello, E. Castrellon, F. Clara, R. McCarthy

Per FRS Ticket 6059 and Work Permit 6284 we investigated and repaired the bad channel and restored the unit to operation.

We initially suspected the 5V linear voltage regulator in the Slow Controls Contentrator #2 (S1103451) and pulled it for inspection, but found that its outputs were working correctly.  We replaced the suspect regulator and added a heat sink to help dissipate heat from this regulator.

Upon reinstallation, most of the bad channels were working, and only one set of related channels were not working.  We traced this failure back to a bent pin on the EtherCAT Corner Station Chassis #3 (S1107447).  This pin corresponds with channel DIV40M which Daniel says was not working since its installation.  The Beckhoff Module associated with these signals was behaving poorly, acting like it had an internal short.  We pulled the Chassis #3 and replaced the Beckhoff module #11 on panel #9, with a brand new E1124 Digital IO Module.

After installation other problems with this chassis surfaced so we replaced one of the computer modules and after much testing we were satisfied that the chassis would work when installed.  I attached an image of all blocks green as seen from the CER.

Need also to move (1) ea. EDP200 BT roughing pump from CS Mechanical Room to Y-mid (Part of mid-term - next 6 months - effort to establish an emergency Beam Tube rough pumping option)

WP#6255 and WP#6293 completed  

0930 hrs. local -> Valved-in RGA turbo to RGA volume and energized filament.  

1130 hrs. local -> Took scans of the RGA volume with and without cal-gases -> isolated RGA turbo from RGA volume -> combined RGA volume with X-end volume and took scans of the X-end with and without calibration gases (inadvertently dumped ~5 x 10-4 torr*L of Krypton or 2 hrs accumulation @ 5 x 10-8 torr*L/sec into site) -> vented RGA turbo and removed from RGA hardware -> installed 1 1/2" UHV valve in its place -> Pumped volume between two 1 1/2" valves to 10-4 torr range before decoupling and de-energizing all pumps, controllers and noise sources with the exception of the RGA electronics which was left energized and with its fan running 24/7.

Leaving RGA exposed to X-end, filament off and cal-gases isolated.  Will post scan data as a comment to this entry within next 24 hrs..

I have updated the SEI_CONF configuration table to more accurately reflect our experience with higher microseism. The extremes of this table (i.e. any version of very high wind and/or microseism) are still being explored as we roll into winter, but so far the nominal "WINDY" state has been sufficient up to 1+ micron/s RMS microseism and 40 mph winds. I have also made a few of the states in SEI_CONF not "requestable", mostly states that had "microseism" in the name. These states are all versions of our high microseism configuration from O1, which only worked in low winds. These states are still available, but you will have to hit the "all" button on SEI_CONF, they no longer show up on the top level drop-down. 

We also might be close to getting some epics earthquake notifications, so that information might get included on this screen in the future.

Operators should reference Jeff's alog yesterday (31029), and my alog 30848 when trying to make decisions about seismic configuration.

Temporarily installed a 2 in. diameter, 45 degree thin film polariser in the output of the pre-modecleaner.
Measured 0.342 W reflected from the polariser with the 10A-V2-SH power meter.  Measured 92.5 W transmitted
through the pre-modecleaner with the polariser removed, and with the L300W-LP power meter.  The power
stabilisation was on for both measurements.

    The output polarisation is calculated to be (1 - 0.342/92.5)*100 =  99.6% linearly polarised.

    Using the same thin film polariser in the input beam to the pre-modecleaner, 15.0 mW was measured in
reflection.  1.51 W was measured in transmission.  The power stabilisation was off for this measurement.
The input polarisation is calculated to be (1 - 0.015/1.51)*100 = 99%.  It's not obvious why it would be
this low.  Other than perhaps the angle of incidence alignment is off a little - a degree of freedom we
do not have - because typically thin film polarisers are somewhat sensitive to input angle.

    Another high power attenuator was installed in the beam between the two Picomotor equipped mounts.
We confirmed that we could re-lock the pre-modecleaner prior to turning off the high power oscillator to
allow for modifications to the field box(es) by Daniel and Keita.




Jason/Peter

WP6288 Dave, Jim:

We cleanly power cycled h1iscex and its IO Chassis this morning between 11:45 and 12:06 PDT. We were not able to reproduce the slight offset on an ADC channel (see attached). Note this channel is actually only seeing ADC bit-noise, so the offset is in the micro-volt level.

BRSY has been continuing its slow drift off of the photodiode, and was about 2-300 counts from the edge, so this morning I went to EY to try to recenter it. I think I was successful, but will need a couple hours to tell. Right now it's still rung up pretty bad, so we will need to wait for it to damp down on it's own a bit before trying to re-engage it. For now, operators should use one of the seismic configurations that doesn't use BRSY.

J. Kissel

Admiring the work of the SEI and ASC teams, we've just lost lock on a really impressive lock stretch in which we had ~40 mph winds, ~70th percentile microseism, and a 5.4 Mag earhtquake in the horn of Africa and survived. It would be most excellent it DetChar can compare amplitudes of ISC control signals, check out the beam rotation sensor tilt levels, the ISI platform sensor amplitudes, take a look at optical lever pitch and yaw compared with ASC signals etc.
    Start: Oct 31 2016 16:15:05  UTC
    End:               17:37-ish UTC