While installing the north door on BSC 1 this morning, as we were inspecting the flange,  I saw what appeared to be a rust spot on the flange in the sealing area of the inner O-ring at roughly the 5 o clock position (facing the BSC from inside the biergarten). 

I wiped, rubbed, and wiped again. I repeated this several times.  There was no drag felt on the alcohol wipe, or on my clean gloves, no "rust residue" or any other foreign material came off on the wipe or glove. 

I put a piece of tape on the bolt head located near this position and showed Kyle the picture. Kyle said he would make a comment on this post.

WP7230

Sheila, Dave:

I have modified h1asc.mdl to reassign the ADC inputs. This model was compiled and installed, and is waiting for a restart tomorrow morning.

WP7230 also covers fixing a PSL bulls-eye channel issue. We believe this was resolved in hardware. Sheila will check if a software change is still needed. If it is, she will add it to her model changes (WP7227).

J. Kissel

I've taken standard transfer functions of the IMs as we begin close-out of the HAM2 chamber. 
All IMs -- IM1, IM2, IM3, and IM4 -- are free of rubbing, and their dynamics look virtually identical to just-prior-to-vent measurements.
We've still got plenty of other things to do, but the IMs are ready for HAM2 door closure.

Huzzah!

Attached are the results and comparisons.

Raw data templates live in 
/ligo/svncommon/SusSVN/sus/trunk/HAUX/H1/
    IM1/SAGM1/Data/2017-12-20_2122_H1SUSIM1_M1_WhiteNoise_L_0p01to50Hz.xml
    IM1/SAGM1/Data/2017-12-20_2122_H1SUSIM1_M1_WhiteNoise_P_0p01to50Hz.xml
    IM1/SAGM1/Data/2017-12-20_2122_H1SUSIM1_M1_WhiteNoise_Y_0p01to50Hz.xml

    IM2/SAGM1/Data/2017-12-20_2124_H1SUSIM2_M1_WhiteNoise_L_0p01to50Hz.xml
    IM2/SAGM1/Data/2017-12-20_2124_H1SUSIM2_M1_WhiteNoise_P_0p01to50Hz.xml
    IM2/SAGM1/Data/2017-12-20_2124_H1SUSIM2_M1_WhiteNoise_Y_0p01to50Hz.xml

    IM3/SAGM1/Data/2017-12-20_2140_H1SUSIM3_M1_WhiteNoise_L_0p01to50Hz.xml
    IM3/SAGM1/Data/2017-12-20_2140_H1SUSIM3_M1_WhiteNoise_P_0p01to50Hz.xml
    IM3/SAGM1/Data/2017-12-20_2140_H1SUSIM3_M1_WhiteNoise_Y_0p01to50Hz.xml

    IM4/SAGM1/Data/2017-12-20_2146_H1SUSIM4_M1_WhiteNoise_L_0p01to50Hz.xml
    IM4/SAGM1/Data/2017-12-20_2146_H1SUSIM4_M1_WhiteNoise_P_0p01to50Hz.xml
    IM4/SAGM1/Data/2017-12-20_2146_H1SUSIM4_M1_WhiteNoise_Y_0p01to50Hz.xml

R. Savage, J. Oberling, J. Driggers, S. Dwyer, P. King (via phone), R. McCarthy, F. Clara

This morning we completed the initial in-air alignment of the ISS 2nd loop PD array.  Recall from yesterday afternoon, we did not make much progress in the alignment.  This was due to the signals out of the PD array dropping for apparently no reason.  After some intial investigation it was decided to re-convene this morning, this time with Rick helping out (as he has worked with the ISS PD arrays extensively).

Some notes from this morning's work:

• The ISS 2nd loop transimpedence amplifier chassis was OFF, thereby preventing us from seeing any signals from the 8 PDs in the array.
  • After talking with Peter, it is unclear if this chassis was ever turned back ON during the vent.
  • This does not explain the issues we were having seeing the beam yesterday afternoon, as the QPD in the ISS 2nd loop array enclosure is read out via a different chassis (per P. King).
  • This chassis, which was a prototype installed before O2, was swapped with a tested and approved production version.  The swap was performed by R. McCarthy and F. Clara.
• We discovered that to really see the beam entering the array, we needed to re-install the temporary HWP after IM1 that Sheila removed yesterday afternoon.
  • We talked to both Ed and Cheryl and were told that this was necessary due to a temporary HWP placed at the base of the PSL periscope.  This HWP was placed in order the purposefully send the wrong polarization into the IMC, I believe to make the IMC flashes easier to see (I may be mis-remembering what I heard, if this is incorrect please correct me in the comments).  This temporary HWP in the PSL enclosure will be removed.
  • This does explain the issues we were having in seeing the beam yesterday afternoon.  As soon as the temp HWP was re-installed in front of IM1 the beam was once again obviously visible on an IR card and the ISS 2nd loop signals were greatly elevated.
• To increase the rate of IMC flashing, we injected a small sine wave (via awggui; f=0.1 Hz, amplitude=1, gain=30) into the L path of MC2.  This made seeing the flashes on an IR card and via the PD array signals much easier.

This taken care of, the beam was then centered on the PD array enclosure input aperture using the first steering mirror (located on the -Y side of the table), and then the signals maximized (to the best we could achieve with a flashing IMC) using the second steering mirror (located on the +Y side of the table).  This was iterated several times until we had a strong signal on all of the PDs and the array enclosure QPD, and the beam was centered on the entrance aperture of the array enclosure.  This is more than sufficient for the in-air alignment; the PD signals will be maximized when the IMC is once again locked (after the corner station is pumped down).

WP7252:

During today's CDS meeting Rolf reported that moving the fast front-end computer's IRIG-B card away from slot-1 resolved timing issues on his test system. To try this out on a production system, this afternoon I moved h1susey's IRIG-B card.

Recall (alog 39361) that on 09nov2017 I had moved h1susey's OneStop from slot-2 to slot-5 as part of this investigation. Today I returned the OneStop back to slot-2, and moved the IRIG-B card from slot-1 to the newly vacated slot-5.

It was a messy restart of h1susey. After taking it out of the Dolphin fabric and issuing the poweroff command, the OS got stuck trying to umount NFS after apparently disabling its network ports. I had to power down using the front panel button, knowing that this would most probably cause a Dolphin glitch. Sure enough, on restoration of power the EY dolphin fabric glitched, requiring a restart of models on h1seiey and h1iscey. EY is now back in operation.

   Richard transitioned the LVEA to Laser Safe. Attached are the plots showing the MC2 and IM4 TRANS going low.

Hugh & Brijesh

After the doors were on the BSCs 1 & 3, we returned the actuator bypass valves to operational position.  To tally the valves that still need to be 'opened':

HAMs 1, 2, 3, & 6, and BSC 2 south side.  All others are in the run position.

Greg, Thomas

Darkhan and I moved the table back to HAM4 the other day, it's not quite in position yet because we haven't coupled to the viewport.  After that, I set up an oplev laser to connected to the beam launcher so that we can align during laser safe.

Greg and I swapped M6, M7, M8, M9 , M10 and Source M2 silver mirrors for dielectric fused silica mirrors via ECR 1700295 for both ITMX and ITMY HWS. We aligned the mirrors to the current in-air beam path but since we've done some work in chamber and moved the tables around, we'll have to realign the in chamber beam path to the table before it's all said and done.

We still have to replace one more in-air beamsplitter with a mount that allows for larger aperture, but I'm still trying to locate it. 

TITLE: 12/20 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    Wind: 9mph Gusts, 6mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.35 μm/s
QUICK SUMMARY:

Jeff B was covering for Corey and subsequently asked me to cover for him for a couple of hours this morning.  Bubba and crew + Chris Soike are out putting doors on BSCs 1&3

While I was transitioning to laser safe this morning, I took the opportunity to turn off the clean room that was over HAM 4, and recently moved to accommodate the install of the NEG pumps. We should not need that clean room running for the remainder of this vent.

I will continue to turn off clean rooms as we close up chambers and all are happy with results. 

J. Kissel, T. Sadecki, B. Weaver

Betsy, Travis, and I have measured the standard top2top transfer functions for ITMX, BS, ITMY. 
They are all clear of rubbing and we ready for doors on tomorrow. Wahoo! 

Attached are processed transfer functions.

Note, for those who have doubts:
Some of the 1st (lowest frequency) fundamental modes appear a little bit squashed, but I'm confident that this is lack of coherence in the measurement: the BSC-ISIs are only damped with HEPI locked, it's a little windy out this evening (~20 mph), and the purge air is running full blast. A little difficult for the OSEMs to drive the whole suspension (i.e. the mode shapes for these lowest frequency modes) above that residual seismic noise. No reason to not put on doors, but we'll check again, as always.

Data files live here:
/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ITMX/SAGM0/Data/
    2017-12-19_2314_H1SUSITMX_M0_WhiteNoise_L_0p01to50Hz.xml
    2017-12-19_2314_H1SUSITMX_M0_WhiteNoise_P_0p01to50Hz.xml
    2017-12-19_2314_H1SUSITMX_M0_WhiteNoise_R_0p01to50Hz.xml
    2017-12-19_2314_H1SUSITMX_M0_WhiteNoise_T_0p01to50Hz.xml
    2017-12-19_2314_H1SUSITMX_M0_WhiteNoise_V_0p01to50Hz.xml
    2017-12-19_2314_H1SUSITMX_M0_WhiteNoise_Y_0p01to50Hz.xml

/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ITMX/SAGR0/Data
    2017-12-19_2317_H1SUSITMX_R0_WhiteNoise_L_0p01to50Hz.xml
    2017-12-19_2317_H1SUSITMX_R0_WhiteNoise_P_0p01to50Hz.xml
    2017-12-19_2317_H1SUSITMX_R0_WhiteNoise_R_0p01to50Hz.xml
    2017-12-19_2317_H1SUSITMX_R0_WhiteNoise_T_0p01to50Hz.xml
    2017-12-19_2317_H1SUSITMX_R0_WhiteNoise_V_0p01to50Hz.xml
    2017-12-19_2317_H1SUSITMX_R0_WhiteNoise_Y_0p01to50Hz.xml

/ligo/svncommon/SusSVN/sus/trunk/BSFM/H1/BS/SAGM1/Data
    2017-12-18_1946_H1SUSBS_M1_WhiteNoise_L_0p01to50Hz.xml
    2017-12-18_1946_H1SUSBS_M1_WhiteNoise_P_0p01to50Hz.xml
    2017-12-18_1946_H1SUSBS_M1_WhiteNoise_R_0p01to50Hz.xml
    2017-12-18_1946_H1SUSBS_M1_WhiteNoise_T_0p01to50Hz.xml
    2017-12-18_1946_H1SUSBS_M1_WhiteNoise_V_0p01to50Hz.xml
    2017-12-18_1946_H1SUSBS_M1_WhiteNoise_Y_0p01to50Hz.xml


/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ITMY/SAGM0/Data/
    2017-12-20_0459_H1SUSITMY_M0_Mono_WhiteNoise_L_0p01to50Hz.xml
    2017-12-20_0459_H1SUSITMY_M0_Mono_WhiteNoise_P_0p01to50Hz.xml
    2017-12-20_0459_H1SUSITMY_M0_Mono_WhiteNoise_R_0p01to50Hz.xml
    2017-12-20_0459_H1SUSITMY_M0_Mono_WhiteNoise_T_0p01to50Hz.xml
    2017-12-20_0459_H1SUSITMY_M0_Mono_WhiteNoise_V_0p01to50Hz.xml
    2017-12-20_0459_H1SUSITMY_M0_Mono_WhiteNoise_Y_0p01to50Hz.xml

/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ITMY/SAGR0/Data
    2017-12-20_0055_H1SUSITMY_R0_L_WhiteNoise_0p01to50Hz.xml
    2017-12-20_0055_H1SUSITMY_R0_P_WhiteNoise_0p01to50Hz.xml
    2017-12-20_0055_H1SUSITMY_R0_R_WhiteNoise_0p01to50Hz.xml
    2017-12-20_0055_H1SUSITMY_R0_T_WhiteNoise_0p01to50Hz.xml
    2017-12-20_0055_H1SUSITMY_R0_V_WhiteNoise_0p01to50Hz.xml
    2017-12-20_0055_H1SUSITMY_R0_Y_WhiteNoise_0p01to50Hz.xml

Ed, Sheila, Hugh

Today I removed the following from HAMS 2&3: ( all iris positions were photographed for convenient visual reference)

• MC1 iris (HAM2)- added an upside down dog clamp to mark position. Removed iris/post/fork w/bolt
• MC2 iris (HAM3)- removed the combination of fork clamps/spacer (w/bolt) that were constructed to hold the post. Left the upside down dog clamp installed.
• MC3 iris (HAM2)- 2 photos were taken of this position and no extra markers were added as it sits centered on a table line in front of it's baffle aperture. Iris/post fork clamp w/bolt removed
• MC3 Trans iris (HAM2)- 2 photos were taken of the two dog clamps used to position the fork/bolt was removed and the two upside down dogs remain.
• PRM iris (HAM2)- multiple photo angles were taken as this post doesn't center on anything of significance and getting an upside down clamp wasn't doable. Iris/post fork clamp w/bolt removed

I got approval from Sheila and Hugh to leave the marker (xxxx640 type) for MC1 iris. It was the only other position that I could fit a clamp against.

The half-wave plate was still in-chamber when I left the area. It will come out as well. ISS work in that area of the table and too many bodies prohibited me removing it at this time. Sheila may have removed it. If not, then I will in the morning.

It seems that when the modifications were done to this particular chassis, there was an accidental swapping of wire harnesses when reassembling that was causing the team som difficulty. The swap I found was at the ISI Coil Driver Chassis Interface Board, connectors P6 and P9, which would swap the Coarse/Fine 1 & 2 Coil Driver Output signals. The unit was reinstalled and I'm waiting to hear the results of this correction.

J. Driggers, S. Dwyer, G. Grabeel, P. King, J. Kissel, E. Merilh, J. Oberling, R. Savage

We've finished in-chamber alignment work including aligning / checking beams incident on IM4 Trans QPD, the ISS 2nd Loop PD Array, and installed then used the temporary viewport simulator for the IMC REFL and Trans beams exiting the HAM2 in-vac table. (The temp viewport remains attached to the chamber).  Remaining tasks for tomorrow morning are to fine tune the ISS alignment using picomotors (Peter K) and moving IM4 cage a little bit in yaw to relieve bias which is currently on 80,000 DAC cnts for 2 osems.  

For all of today's alignments, we used the flashing IMC beam, *without* the bypassing the input mode cleaner. We elected not to bypass because (a) we're heavily constrained on the amount of experts' time for aligning these systems, (b) there's sufficient amount of input power (still ~170mW) that we could easily see the beam all the way to the input of the ISS array (which is behind (less than) 50ppm transmission of IM4 (aka PMMT2, ~25 ppm Trans), and two 90R-10T beam splitters ROM LH1 and ROM RH4; see E1300206), and (c) co-aligning the by-pass to the IMC flashing beam is a HUGE time-suck with its current functionality. (See notes in comments below.)

Technically, although we've confirmed that the flashing IMC beam enters the ISS array box, Peter / Rick will continue to work with the in-vac steering mirror picomotors to center the beam on the ISS array's alignment QPD early tomorrow morning.

Also, for IM4 Trans, while we weren't able to physically see the beam on a card, we were able to see the beam on the QPD readout, which was showing signal synchronous with IMC flashing, according MC2 trans. The alignment  was 0.65 for P, -0.25 for Y (in "standard" normalized QPD units).

For IMC REFL, we adjusted nothing, and the beam came out as shown in the IMCREFL picture.
For IMC TRANS, we moved ROM RH2 (the steering mirror behind / in transmission of IM1) in YAW three full turns of the the allen key. This moved the spot position at the table port by about 45mm (we recreated a "virtual" table with a table measure), to move it from virtually clipping on the edge of the ring / viewport simulator. The beam now comes out of the "viewport" as shown in the IMCTRANS picture.

Last Fri (12/1), I went into BSC1/2/3 to take a few photos.  Betsy requested a few line of sight photos of (ITMx to PR2) & (ITMx to SR3)--these shots are to highlight/show the baffling involved in these paths (so we have baffles around the BS and also on the BS Suspension structures).  

I took 150+ photos, but unfortunately I don't have a place to upload them (resourcespace has had issues for me for the last year or two).  Photos will be on my computer.  Am also attaching some highlights (their names roughly say what is in the photo---it's hard to tell what's in the pictures, but I am hoping I've labeled them correctly).

[Maddie W., Aaron V., Greg M.]

Here is a summary of the filters and command line arguments that should be used for the C02 frame generation using the DCS calibration pipeline.  This information is compiled from configurations wiki page and aLOGs linked from that wiki page.  The command line arguments should be the same as for C01 except for changes noted in the table below.  (Additionally, the frame names and channel names should be changed appropriately to C02.)

--expected-fcc=347.2
--coherence-uncertainty-threshold=0.004
--wings=(something larger than 600)
--no-fs 
--no-srcQ
--update-fcc
--fcc-averaging-time=600
--fcc-filter-taper-length=32768
--pcal-channel-name CAL-PCALY_TX_PD_OUT_DQ

--expected-fcc=360.0
--coherence-uncertainty-threshold=0.004
--wings=(something larger than 600)
--no-fs
--no-srcQ
--update-fcc
--fcc-averaging-time=600
--fcc-filter-taper-length=32768
--pcal-channel-name CAL-PCALY_TX_PD_OUT_DQ

--expected-fcc=360.0
--coherence-uncertainty-threshold=0.004 
--wings=(something larger than 600)
--update-fcc
--fcc-averaging-time=600
--fcc-filter-taper-length=32768
--pcal-channel-name CAL-PCALY_TX_PD_OUT_DQ