[Gregg, Jason, Aidan, TVo, TJ, Jon]

We located the correct Siskiyou 2" mirror mounts (IXM200) for the HAM4 work this morning. Thanks to Corey, who pointed us to two spares that were in the optics lab and were Class A cleaned.

HAM4

Recall that yesterday, we discovered that the 2" mirror mounts that we had been given for mounting the DCBS were DLC mounts, not Siskiyou mounts. The DLC mounts put the optic height 0.5" higher than the Siskiyouu mounts do.

We removed the existing DLC mounts that were added yesterday and removed the dichroic beam splitters (DCBS - T = 300ppm for 1064nm at normal incidence [MI1000]) from these mounts. In doing so, we noted that both DCBS had visible particulates on them. Additionally, the DCBS on the X-arm had a small smudge on the optic and a chip in the barrel. We decided to proceed with the install of the new Siskiyou mounts and assess the action to be taken with the optics after install.

The ITMY laser was turned on again and we were able to use the leakage of this laser through SR2 to align the Y-arm DCBS. We pitched it down a considerable way and confirmed that the reflection from it was dumped on the scraper baffle well below the optical axis.

We adjusted the SR3 alignment to get a ghost beam coming off HWS STEER M1 aligned through the HWSX optics. We installed the new Siskiyou mount on the existing pedestal and noted the height was approximately 6mm higher than neighbouring optics. The pedestal and mount were shifted towards the in-vacuum lens by approximatley 3" (new position is shown in the attached image). Original assembly shown in D1101083-v2.

We centered the DCBS on the laser beam and then adjusted the pitch so that the return beam was dumped on the scraper baffle. For reference, we measured the return beam as it hit HWSX STEER M3 and it was 10mm below the incident beam on that optic. Since the DCBS is approximately 12" away, this puts the reflected beam angle at -1.9 degrees. This put the return beam about 45mm down from center on the HWS SCRAPER BAFFLE.

Conclusion:

The optical mounts are installed and aligned, however, the optics themselves almost certainly need to be cleaned if not replaced. For reference, the HWSX DCBS sees about 300mW of 1064nm light (at about 25W input power into the IFO). The HWSY DCBS sees about 100nW.

It appears that some process variables are taking on values with characters that do not conform to JSON:

Oct 18 11:10:12 conlog-master conlogd[7334]: terminate called after throwing an instance of 'sql::SQLException'
Oct 18 11:10:12 conlog-master conlogd[7334]: what():  Invalid JSON text: "Invalid escape character in string." at position 44 in value for column 'events.data'.
Oct 18 11:41:52 conlog-master conlogd: Server started. prefix: 'H1:CDS-CONLOG_' database: 'conlog' max inserts: 500 max time: 30 keep alive period: 30 time source: 0 create_messages: 1
Oct 18 11:59:32 conlog-master conlogd[8524]: terminate called after throwing an instance of 'sql::SQLException'
Oct 18 11:59:32 conlog-master conlogd[8524]: what():  Invalid JSON text: "Invalid escape character in string." at position 44 in value for column 'events.data'.
Oct 18 12:19:34 conlog-master conlogd: Server started. prefix: 'H1:CDS-CONLOG_' database: 'conlog' max inserts: 500 max time: 30 keep alive period: 30 time source: 0 create_messages: 1
Oct 18 12:34:12 conlog-master conlogd[9092]: terminate called after throwing an instance of 'sql::SQLException'
Oct 18 12:34:12 conlog-master conlogd[9092]: what():  Invalid JSON text: "Invalid escape character in string." at position 44 in value for column 'events.data'.

The same error repeats at each loading of the channel list.

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.

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.