I found the original naming of the squeezer flippers confusing, so I have changed them since it will only become more difficult to change names. 

The flipper in the CLF path was called SQZ-OPO_IR_FLIPPER  I changed this to SQZ-CLF_FLIPPER and the one in the green pathfrom the SHG to the Fiber was called SQZ-OPO_GR_FLIPPER, I called this SQZ-SHG_FIBRFLIPPER)

I updated the system manager, and the channel link list. 

All HAM and  CS BSC ISIs are currently locked.

WP7184:

I have completed the first stage of offloading raw minute trend data from h1tw1's SSD-RAID array. This step required a quick restart of h1nds1 in order for it to find recent raw_minute_trend data at its temporary location on h1tw1.

I'm starting the next step; copying the data from h1tw1 to h1fw1 for permanent storage on hard spinning media. This runs in the background and typically takes three days.

If anyone going into the LVEA feels so inclined to power cycle it for me, i would appreciate it. It's located on the NW side on top of the HEPI beam (kinda tucked underneath the chamber).

TITLE: 10/18 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    Wind: 17mph Gusts, 12mph 5min avg
    Primary useism: 0.05 μm/s
    Secondary useism: 0.26 μm/s
QUICK SUMMARY:

(Subbing for Cheryl)

Some discussion about whether or not the TGG crystal in the output Faraday should be epoxied in place
or should be floating.  The two rotators examined thus far, SN002 and SN003, have the TGG crystal
loose within its containment sleeve.

    Attached are pictures of the spare TGG crystal.  The hole in the sleeve, which maybe a vent hole,
is clearly plugged with something that is hard to the touch (VentHole.jpg).  Looking at the inside,
one can see where said substance has spread on the inside (Blister.jpg).  Without prodding the crystal
too hard, it did not move.  Obviously there are no magnetic fields to hold it in place in this case.

Fil Patrick Ed Daniel

1. The squeezer chassis are now connected to EtherCAT and readout by the computer.
   We need to rewire some CAT5 cables inside SQZ common to make it work.
2. A h1sqz model has been created which simply reads all the channels into filter modules.
   Still needs to be booted into the front-end computer.
3. The corner 6 mods have been implemented to account for the 72/117 MHz RF generation.

Big thanks to Jon, TJ, TVo and Jason for a 6-hour effort.

Today was a big day aligning things on HAM4. We got the main alignment laser set up using the gooseneck mounts and corner cubes. We got the new 4" HWSX STEER M1 mirror mount installed, replacing the old mount and shifting the pedestal in +Y direction by approximately 20mm. 

Unfortunately, we ran into two problems with the DCBS mirror mount replacement. Firstly, the pedestals were machined for 2" Sisikyou mounts (which we were to recover from the HAM IS OPLEVs). However, these turned out to be a different (non-Siskiyou) mirror mount which placed the optic about 7-10mm higher than desired. Additionally, it turns out that the X and Y HWS arms are are slightly different beam heights. The result of these two issues put the Y-arm DCBS about 10mm higher (borderline usable) than desired and the X-arm was about 20mm higher (not usable). We're going to have to remachine them. I'll post images and full details tomorrow.

Good news: the Y-ARM DCBS can now easily tilt its reflection down cleanly into the HWS SCRAPER baffle. Also, the alignment of the DCBS can be done in future with a simple laser on confined to HAM4, rather than the whole ITMY, BS, SR3, PR3 procedure we did today.

Major activity of the day was HWS work at HAM4 (with alignment work for this at HAM2 & BSC1/2).  [Aidan, Jon, Thomas V, TJ, Jason]

Day's Activities:

• Monday's 8:15 Meeting was today instead (due to yesterday's
• 15:46 Pulling fiber for Squeezer in CER (Fil)
• 16:06:  Cintas for mats
• 16:07:  Removing baffles at HAM2 for TCS alignment work (TJ)
• 16:11 & 17:10:  Septic tank cleaner trucks arrive
• 16:25:  HWS Team heading out to the floor (Aidan, Jon, Thomas V.)
• 16:30:  Installing HWS alignment parts in BSC1 & BSC2 (Jason)
• 16:30:  Pulling ethercat chasis in CER (Ed)
• 17:15:  3IFO work at MX (Hugh)
• 17:28:  CP7 (EY) LN2 delivery
• 17:59:  CP5 (MX) LN2 delivery
• 18:46-19:21:  Install Sky Cam (Elizabeth)

The aLIGO Beamsplitter and ITM elliptical baffle alignment procedure was attempted along the ITM-Y to SR3 path.  

The alignment beam was centered at ITM-Y.  Some rework of the tooling is required, so the error in centering at the ITM for this measurement is estimated to be less than 2.5 mm - corresponding to the alignment beam radius.
There was no target at SR3, so we tilted the alignment laser to center the spot on the Beamsplitter Baffle alignment tool D1200901 just to see what it looked like there.
Upon removal of the alignment tool, the beam was seen to be about half way between center and edge of the SR3.  High and right as viewed from ITM-Y.
An error of ~ 66 mm at SR3 would correspond to 13 mm of error of the BS HR baffle position - assuming the alignment spot was well centered at the BS target and ITM-Y



Some useful numbers:
SR3 diameter: 265 mm
Distance from ITMY to BS HR 5,167 mm
Distance from BS HR to SR3 19,432 mm
Alignment spot size at  ITMY 5 mm diameter



Alignment Procedure draft
https://dcc.ligo.org/E1700341-v1

GariLynn Billingsley
Jason Oberling
October 12, 2017

This morning I completed the weekly PSL FAMIS tasks.

HPO Pump Diode Current Adjust (FAMIS 8444)

With the ISS OFF I adjusted the operating currents of the HPO pump diode boxes.  The changes are summarized in the below table; a screenshot of the PSL Beckhoff main screen is attached for future reference.

I did not adjust the operating temperatures of the DBs.  The HPO is now outputting 154.4 W and the ISS is back ON.  This completes FAMIS 8444.

PSL Power Watchdog Reset (FAMIS 3672)

Both PSL power watchdogs were reset at 15:49 UTC (8:49 PDT).  This completes FAMIS 3672.

Per Workpermit 7158

Our plan of action today:

Prep work:

1. Remove PR3 baffle [TJ]

2. Wipe down goosenecks and assemble them with corner cubes [Jason]

3. TVo finds out channels to use to steer BS and SR3

The order of operations will be as follows:

1. Jason into BSC1 to align laser to ITMY

2. TJ into HAM5 to guide Jason into aligning laser to cross-hairs on SR3

3. TJ removes cross-hairs from SR3 and transfers to PR3 in HAM2. Close HAM5 cover.

4. TJ guides TVo (on computer) to steer BS so alignment laser is centered on PR3 cross hairs. Close HAM2 cover

5. Jason attaches first gooseneck to BS TMD and centers the corner cube on the BS reflection beam with iris mostly closed.

6. Jason attaches second gooseneck onto BS TMD and centers the corner cube on transmission through BS (heading to ITMX).

7. Aidan [HAM4 South] guides TVo to adjust SR3 alignment so main laser is aligned to the center of SR2.

8. Aidan replaces and aligns HWS STEER M1 making sure optic is in the correct position. Jon [HAM4 North] guides alignment to HWSX STEER M2

9. Jon remove 2” Siskioyu mount from HAM4 ISI OPLEV

10. Jon installs replacement DCBS mount on HWSX and aligns reflection halfway down the scraper baffle. Make sure laser is centered on the DCBS

11. Jon repeats step 9 for the HWSY path. Laser might be 6mm low from center on DCBS but beam is still about 2-3 beam diameter from the edge.

12. Jason removes corner cubes from BS

13. TJ removes cross-hairs from PR3 and reinstalls baffle.

Meeting Highlights:

• TCS Hartman Work (Aidan, John, T-Vo, TJ):  HAM4 alignment work (will take most time today), swap optics at HAM4‌ (~1hr).
• HAM4 cleanroom was mentioned as being off-center & possibly in way for TCS work, but may also have interferences (Hugh & Bubba)
• Baffle status:  HAM2 work, MC Baffle assembly work (TJ)
• Vacuum:  Gate Valve Y-beam Manifold (cont), CP1 work next week to look for leak (Chandra)
• DAQ reboot at noon ("be sure to note suspension values")
• OFI status update (Peter)

I happened to notice on the laser MEDM screen that the NPRO power monitor is significantly off.  No corresponding drop
in the output power of the front end though.

    Just checked the gain for the channel that monitors the NPRO power.  For (currently) unknown reasons the gain changed
from -1.013e-3 to -6.24e-4.  Maybe this was the result of a BURT restore to an out of date value?

    I took the liberty of changing the gain back to the old value.

The Faraday rotator (SN002) was removed from HAM5 since it was thought that it would used for the
output Faraday isolator rebuild.

    We noticed that there are two damage marks on the TGG crystal.  Perhaps consistent with a
tool impact at some stage due to the strong magnetic field.  In addition the TGG crystal is not
epoxied in place and is loose just like the one in SN003.

    Given the above, the output Faraday will be rebuilt using SN003.


  Gerardo / Peter

Corner Station signals are a bit all over, but I reckon this is to be expected with open chambers.

End Stations holding steady.

J. Kissel

Took a set of Top to Top transfer functions for H1 SUS SRM this evening. Results look like the suspension remains free after Betsy & co re-engaged the OSEMs from having backed them off during the monolithic optic install. 

Data lives here (and has been exported to files of similar name):
    /ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/SRM/SAGM1/Data/
        2017-10-13_2122_H1SUSSRM_M1_WhiteNoise_L_0p01to50Hz.xml
        2017-10-13_2122_H1SUSSRM_M1_WhiteNoise_P_0p01to50Hz.xml
        2017-10-13_2122_H1SUSSRM_M1_WhiteNoise_R_0p01to50Hz.xml
        2017-10-13_2122_H1SUSSRM_M1_WhiteNoise_T_0p01to50Hz.xml
        2017-10-13_2122_H1SUSSRM_M1_WhiteNoise_V_0p01to50Hz.xml
        2017-10-13_2122_H1SUSSRM_M1_WhiteNoise_Y_0p01to50Hz.xml

Will post detailed graphical results with the usual comparison against previous measurements and the model on Monday. Attached is a sneak peak of the Pitch to Pitch TF, the DOF usually most sensitive to shenanigans.

Betsy, Hugh, TJ

Last week Betsy put the heater on the table and today Hugh checked it's vertical center with an auto-level. Some washers were added to get it as close to center as possible, which ended up around 0.4mm high. Betsy and I then had to wiggle the assembly into place, and rotate the entire gold ceramic holder to allow the screws on the outside to clear the OSEM brackets. The heater is currently sitting ~6mm away from the back of the SR3 optic and it is plugged into the feed through.

Picture attached.