PSL Power Reduced to 100 mW, PSL Rotation Stage Locked Out

S. Dwyer, P. King, J. Kissel

Shiela reduced the 1064 nm laser power coming from the PSL going into the vacuum system via the PSL's rotation stage down to 108 mW (measured down stream of the PSL rotation stage, H1:IMC-PWR_IN_OUT16) to 108 mW, then Peter and I locked out the rotation stage controller. We've confirmed that requesting adjusting rotation stage angle does not change the power after locking out the controller.

It's currently laser SAFE (the PSL light pipe has been shuttered as normal), but in case we need the PSL light for alignment later, I figured we'd get the procedural stuff done before we need it. Due to IMC particulate concerns, we wish not to have higher than ~100 mW in-chamber while in air, so as to not burn stuff into a flashing IMC (see M1300464).

Dust Counts Before HAM5 Door Removal

J. Kissel

I gathered a dust count reading before doors were removed this morning. Counts are zero and zero!

HAM5 HEPI Locked

J. Kissel, J. Warner

In prep for today's vent, Jim and I locked HAM5 HEPI. 

Displacements between locked and unlocked are on the order of ~20-30 um, and 5-10 urad from nominal floating position with IPS-only, "position" loops closed. See attached screenshots, but I recap pertinent info below.

    dX    -2.3 um
    dY   +17.6 um 
    dZ   +23.7 um
    dRX   +1.2 urad
    dRY   +4.1 urad
    dRZ   -8.7 urad

I also attach pictures of the locking bolts / set screws. To lock HEPI (while attempting to preserve alignment):
    - Procure a CDS laptop, and open MEDM to get the DC BIAS screen of the given HEPI you want to lock
    - Take a screen cap of the screen before you get started.
    - Run all set screws and bolts into such that they're barely contacting the floating cube in each / every corner.
    - Using the appropriate allen wrenches (you'll need two sizes, 3/16" and 1/4"), and while watching the attached displacement screen, gently nudge the bolts further into contact until tool tight, rotating between bolts / set screws so as to not crank on any one bolt more than the others for a given tightening iteration. It's fine to do this sequentially around the corners. 
    - Displacements from nominal on the order of a few 10s of um / urad are the precision you'll be able to lock the position.
    - Take another screenshot of the position and displacement once done and record.

This process takes about 20-30 minutes.

    

PT246B 12 hour trend

Minute trend plot of PT246B for the last 12 hours attached per Gerardo's request.

Vacuum summary for the day

Gerardo, Mark D. Tyler, Chandra

Corner

• Torqued IP5 studs metal on metal
• Got XBM & YBM on turbos/scrolls and leak checked:
  • IP6 valve (beam tube side) and PT-170 gauge with background at 3.1e-9 Torr-L/s (there will be no IP6 installed here until rebuilt unit ships from vendor in May)
  • IP5 + valve with background at 2.0e-9 Torr-L/s. We had some troubles pumping down IP5 with pump carts. The little red "cube" kept tripping, even with a 'hung' turbo. The trusty old pump cart survived the long wait through ~10 Torr. We thought we had a big air leak somewhere, but all checked out. IP5 isolation gate valve was left open to pump down with main YBM volume
  • New GV on XBM turbo is leak tight with background at 3.3e-9 Torr-L/s
• Vented vertex
• Loosened bolts on IP3 to prepare for R&R tomorrow (no, not that kind of R&R). Left its isolation GV open
• Loosened HAM5 doors bolts

EY

• Torqued IP11 stack studs metal to metal
• Installed BSC10 door and successfully pumped down annulus (i.e. no leaks)
• Turned on QDP80 to warm up
• Purge air scroll #4 is loud, so we turned it off for now. Might be a bad one-way valve
• Connected charged battery pack for turbo

We will start roughing down EY tomorrow.

Prior to corner station vent, high voltage has been turned off (as per items mentioned in M1300464).
    - ESD driver
    - Fast shutter de-energized
    - OMC's PZT actuator drive
    - Picomotors
ITM Ring heater's measured power is zero (power is off at chassis), and I've changed the requested power to zero via MEDM.

The net pump speed of this diaphragm backing pump is "much" less than what we are used to. I used this portable pump station for the first time the other day to evacuate 4 lengths of 1.5" flex line + the volume between IP6's closed GV and the zero-length reducer and it took "minutes" not seconds.

H1SUSTMSY Closeout TFs Look Great

J. Kissel

I've taken standard close-out transfer functions for H1 SUS TMSY. It's free and clear of rubbing, and results looking strikingly similar to before. OK for pump down!

Raw data is committed here:
    /ligo/svncommon/SusSVN/sus/trunk/TMTS/H1/TMSY/SAGM1/Data
        2018-04-04_2209_H1SUSTMSY_M1_WhiteNoise_L_0p01to50Hz.xml
        2018-04-04_2209_H1SUSTMSY_M1_WhiteNoise_P_0p01to50Hz.xml
        2018-04-04_2209_H1SUSTMSY_M1_WhiteNoise_R_0p01to50Hz.xml
        2018-04-04_2209_H1SUSTMSY_M1_WhiteNoise_T_0p01to50Hz.xml
        2018-04-04_2209_H1SUSTMSY_M1_WhiteNoise_V_0p01to50Hz.xml
        2018-04-04_2209_H1SUSTMSY_M1_WhiteNoise_Y_0p01to50Hz.xml

DMT test box patched and rebooted

The DMT test box, h1dmt3, was patched and rebooted today at about 2 pm PDT. This should have no impact on the control room.

Shift Summary - Day

TITLE: 04/04 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC

STATE of H1: Planned Engineering

INCOMING OPERATOR: None

 

LOG:

14:39 (7:39) Tyler, Mark to EY

15:00 (8:00) Start of shift

15:15 (8:15) Bartlett to EX -- reset dust monitor #2

15:39 (8:39) Bartlett leaving EX

15:59 (8:59) Chris to EY -- delivering bolt

16:05 (9:05) Tyler, Mark back from EY

16:14 (9:14) Peter and Fil transitioning to laser safe

16:31 (9:31) Gerardo to EY -- vacuum work

18:14 (11:14) TVo, Sebastien, Dan, Alexei to LVEA

18:39 (11:39) Gerardo back from EY

19:02 (12:02) Gerardo to LVEA

19:29 (12:29) Fil to ISCT6 -- collect GIGE cameras

19:57 (12:57) TVo, Sebastien, Dan, Alexei out of LVEA

20:19 (13:19) TJ to HAM5 -- cleaning up

20:39 (13:39) Chandra, Tyler to LVEA -- craning work

20:43 (13:43) Gerardo to IP5

20:46 (13:46) Betsy to LVEA -- find something for Livingston

20:48 (13:48) Elizabeth to LVEA

21:02 (14:02) Jason to PSL enclosure -- grab materials

21:03 (14:03) Betsy out of LVEA

21:20 (14:20) TJ out from HAM5

21:29 (14:29) Jason out of PSL enclosure

21:37 (14:37) Elizabeth out of LVEA

22:01 (15:01) Betsy to LVEA -- investigate HAM5 HEPI

22:26 (15:26) Tyler out of LVEA

22:38 (15:38) Mark out of LVEA -- finished moving forklift

23:00 (16:00) End of shift

H1 ETMY closeout TF's, door on WBSC10

I spend most of the day taking transfer functions of the ETMY main and reaction chains intermittant with my other crazy business.  Kissel took over after I exported all of the data but got a flag during the matlab processing of it and had wandered off with my patience.

Things look good with the plots now (as hinted via the quick looks at closeout yesterday), see attached.

Kissel has committed the new data to the SVN repository.  Data can be found at the usual Data or Results directories at

/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ETMY/SAG*/

Weekly PSL Chiller Reservoir Top-Off

FAMIS 6569

Added 70 mL to crystal chiller.

H1 ISI CPS Sensor Noise Spectra Check - Weekly

FAMIS 6944

Reported ETMX frequency noise as being high.

Venting vertex and turbos spinning on beam manifolds

Started venting vertex this morning and spun up turbos on XBM and YBM. Looks like IP1 isn't going to make it - its isolation GV is probably leaking. The new GV on IP4 is sealing great!

replacing 1" pico mirror with fixed one in OMCR path, removing OMCR components downstream of SiC dump (Sheila, Keita)

We're replaced a 1" pico high reflector and a black glass behind with non-pico version in OMCR path. PSL beam was not available so no alignment.

We removed the following components from HAM6 (refer to D1000342):

• M9. This is aforementioned 1" high reflector on left handed Siskiyou and pico with black glass behind. Pole and base plate were reused. (Non-pico Siskiyou that was used as a replacement is right-handed, not left.)
• 90:10 splitter on a Siskiyou lens mount.
• Black glass dump to receive the reflection of 90:10 splitter.
• M10, this is a 2" high reflector with picos and black glass behind.
• M11, this is a 2" 50:50 splitter without picos.
• The entire OMCR QPD sled including QPDs/cable assy (D1101654, S1108061).
• In-chamber DB25-four mighty mouse cable for pico (D1000238, S1105053).

We found that the black glass dump had some fogging on one of the two panels. Photos to follow.

ETM15 Ears bonded

Between yesterday and today, Gerardo and I successfully bonded the ears to core optic mass ETM15, destined for LLO for post-O1 eventual replacement. 

Ear s/n 195 bonded to S3 flat of mass June 29, 2016

Ear s/n 196 bonded to S4 flat of mass June 30, 2016

The first ear (s/n 195) has a series of bubbles along it's edge, but the surface area of these do not add up to more than the allowed amount as per E1000277, so it passes, see pix attached.

The second ear (s/n 196) has no bubbles and is nice full bond.