STATE of H1: Lock Acquisition
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 10mph Gusts, 6mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.25 μm/s
QUICK SUMMARY:

Lockloss at 00:14 UTC

Unsure of what happened here. No sign of ground motion, wind, Pis, or SUS saturations.
There is a small ETMX Glitch on the lockloss page, but it is below the threshhold to trigger an ETMX glitch flag.

H1 Returned to Observing at 01:35 UTC

J. Freed

This is the summary page for the investigations at LHO into the First Stage BOSEM damping contributions to DARM.  PR3 shows the strongest contribution to DARM by about a factor of 10 below DARM between 8Hz - 25Hz. ETMX and ETMY shows cotributions to DARM by a factor of 20 between 10Hz - 14Hz below DARM. SR2, SRM, and PR2 shows strong contribution between 7Hz - 12Hz by factors between 4 to 10 below DARM. Where as BS, ITMX, ITMY shows little to no contributions.

This is a summary of the work done previously for BS, ITMX, ITMY, PR2, PR3, PRM, SR2, SR3, SRM, ETMX, and ETMY. Starting with PR3, data was take with excitation gains of 300 ontop of the 600 gains to help check against any noise gained independant of excitation during data collection. This summary page only uses the 600 gains however as extra data was not collected for all suspentions.

The plots and code are located at /ligo/home/joshua.freed/bosem/sum/scripts. I used the code located under /ligo/home/joshua.freed/bosem/sum/scripts/osem_budgeting.py to produce the sum of all contributions as well as the individual plots.

Below are the graphs showing the estimated contributions from each bosem on each suspension:

TITLE: 03/10 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 154Mpc
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 13mph Gusts, 7mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.27 μm/s
QUICK SUMMARY:

H1 is currently Locked for 1 Hour and 20 minutes.
All systems seem to be opperating well.
I expect to be Observing until Maintenance tomorrow morning.

TITLE: 03/10 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Tony
SHIFT SUMMARY:

Maybe 2hrs of Observing today, with locking at the start, getting to Observing a few minutes, dropping out for Commissioning, observing for a few minutes, then a lockloss due to a power supply dying at EY and then getting back to observing!

LOG:

• 1518 OBSERVING (recovering from lockloss at 1332)
• 1531 Out of observing for COMMISSIONING (sheila.camilla.matt)
• 1549 drilling holes at Staging for elec to new storage bldg (ken)
• 1553 Tyler phoned about LSB roofer noise for removing old roof
  • Also remember to LOCK the 
• 1555-1641 MX clean & checks (kim)
• 1722 ISS Array work in optics lab (myank)
  • 1804 siva joining
  • 1915 keita joining
  • 1920 Matt joining 
• 1735 Reports of seeing a smoke plume NW of LHO site (Looking down X-arm, it is to the west of Vit Plant as looking via camera---not sure if it was on the Hanford site or if it is beyond the Columbia River).  UPDATE:  45min later smoke plume gone.
• 1850 Back to Observing
• 1902 ETMy glitch on Verbal AND H1 LOCKLOSS marking DOWN TIME for electrical issue
  • 1902 EY ISI Watchdogs trip
  • CDS Overview is GREEN
  • RyanS noticed DIAG SDF saying there were EY Ring Heater issues & Camilla confirming EY Ring Heaters have issue.
  • 1915 Fil heading down to EY
    • 1930 Powering down Power Supplies for TCS & ISC
  • 1924 Sensor Correction turned OFF since people may enter EY VEA(jim) 
• 2000-2058 working in EY valve room (gerardo)
• 2045 Got word of everything being FIXED at EY, so....
• 2050-2113 Initial Alignment started (with Y-Arm being fine btw)
  • Started locking, but Y-arm kept losing lock (as seen for the last few weeks.
  • 2127Went through a Manual Alignment of Green Arms
• 2230 Back to OBSERVING!
• 2220-2310 Testing WFS POP_X in optics lab (daniel)

Attached are two examples where it seems that ALS losses lock after the ESD linearization hits its saturating limit, there are several more examples like this. 

With the linearization on, we measured the transfer function from drivealign L out to LL master out to be -2.3.  Taking into account the gain of 0.25 in the eul2esd matrix, we would need to add a gain of -9.2 in the drivealign matrix to try locking ALS without the linearization. 

Jeff, Jim, Oli
ECR E1700228

Previously, the h1isiham1 simulink model terminated the outputs coming out of the GS13. Now that we'll be installing the ISI, we will need those, so we've taken those outputs, converted them to Euler DOFs, and then have Length being sent out over to the HTTS(after-h1isiham1). In the h1sushtts model, we then updated the Length input coming over PCIe from h1isiham1 (currently called TTL4CFF_2_PM1 - eventually this and the TTL4C_2_RMs will be all changed over to be from ISIs). Last time (83196) we had set 0s to feed into the L, P, and Y components of TTL4C_2_PM1, but now L is reading in from h1isiham1 PM1 Length (after-h1sushtts). For now, we are still going to be reading from the TTL4CFFs for RM1 and RM2 (the same as they have been).

Both h1isiham1 and h1sushtts have successfully compiled and have been svn'd at revisions:

h1sushtts.mdl     30950
h1isiham1.mdl     30951

I changed the supply air temperature high limit of the End X air handler from 60 to 65 degrees to give the program broader control of the chilled water valve. This will allow the program to throttle the chilled water rather than rely on heater coils for temperature control. This may create a small increase in the temperature trending while the P.I. loop adjusts.

Right after Commissioning, H1 had a lockloss and several systems showed odd behavior (EY ISI WD trips, CPS St1 have huge signals, EY Ring Heaters show bad/dead state...).

Fil now at EY and mentioned the TCS and ISC Power Supplies were down and so he needed to restart them.

FRS33539 ticket started. 

Sheila, Mayank, Camilla

The SQZ ang servo has been off since Feb 18th 82891. Today it was turned back on in sqzparams.py and with SQZ_ANG_ADJUST nominal state is now ADJUST_SQZ_ANG_ADF. We expect this to work better than in 82891 as we adjusted H1:SQZ-ADF_VCXO_PLL_PHASE to 25deg so that the AFD H1:SQZ-ADF_OMC_TRANS_SQZ_ANG error signal is in a linear range where our best SQZ is. This should improve the squeezing and keep it more stable.

Sheila, Matt, Mayank, Camilla

Today we changed the nominal FC beamspot control:

• Old: Using the TRANS A PD feeding back to INJANG and ZM3
• New: ADS PIT2/YAW2 oscillators into FC2 (Maynak set up in 8309)  into INJ_ANG and feeding back on ZM3.
  • ASC oscillators on FC1 and FC2 have been left on so that we can check if we also need to use FC1 signals feeding back to ZM1 as LLO does.

Sheila put the OSC amplitudes back to 10 and steps each AL2 gain to check its in I only (need to change PIT2 by 90deg), then adjusted A2Ls to get I close to zero. YAW1 has more noise than others.

Turned off the INJ_ANG ASC (feeds back to ZM3 as "FC beamspot control") and then steps ZM2/3/ P/Y offsets. After we worked out the matrix element, we tried to close each loop: turned off input, clear history, turn back on input, turn on gain. Closed each one and and did the next. Closed INJ_ANG for ZM3 in PIT and YAW.

ZM2 had a large response in PIT2 and not a noticeable response in PIT1. If we move ZM1, we see it in both PIT1 and PIT2, but the INJ_ANG loop zeros PIT2 but the PIT1 error signal remains. There's too options to avoid this, either do a combination of ZM1/3 to avoid cross coupling, but the easier option is to keep the INJ_POS loop slower (gain lower) than INJ_ANG. The change was very small (or no change) for YAW1 so we decided to only use PIT1/2 to INJ_ANG to ZM3 P/Y as the feedback for this week.

Edited SQZ_FC guardian OFFLOAD_FC_ASC to also offload INJ_POS if we decide to use these filters. As the intergrators as still in the FC ASC filters, this is a homemade ASC offload, rather than the standardized ISC one. A future task is to move the intergrators into the ZM suspensions as we did for ZM4/5/6.

Accepted sdfs, and checked the that FC Guarudan just switches on the  SQZ-FC_ASC_INJ_ANG_P/Y inputs and doesn't touch the matrix elements. INIT did reset the outmarix, but this should be controlled only by sdf so I deleted that block and reloaded.

Mon Mar 10 10:08:35 2025 INFO: Fill completed in 8min 32secs

Jordan confirmed a good fill curbside.

FAMIS 31076

Nothing really to report this week; trends are looking steady and things are behaving as expected.

TITLE: 03/10 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 13mph Gusts, 7mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.35 μm/s
QUICK SUMMARY:

H1 lost lock (7hr lock with "refined" tag) about an hr ago and just finished an initial alignment.  Commissioning time is scheduled in 40+min.

Secondary microseism looks below the 95th percentile (probably following the activity in the N.Atlantic's Greenland/Labrador region).  Winds are breezy just below 20mph and have been fairly constand the last 22hrs.  The big EQ last night was on the small island of Jan Mayen part of Norway (our biggest EQ of the weekend).

• Average duty cycle for LHO this week was 65.1%
• The BNS range fluctuated between 140 and 153Mpc this week
• A couple of the locklosses can be explained due to ground motion throughout the week and locklosses due to ETMX glitches on Sunday
• Strange noise pattern in HAM2 motion Y Thursday through Sunday and noise in BSC2 motion Y at a different frequency than the previous week on Tuesday and Wednesday
• Fscan line count did not appear for several days and was below the threshold for the remaining ones
• Some new channels in Hveto this week, and multiple repeated channels throughout the week.

Link to the report

I assembled the 45MHz WFS unit in the optics lab. Assembly drawing: D1102002.

BOM:

• 1x Pre-assembled WFS body (D1102004 s/n016 Main Body, sealed & scribed as "S1300637" according to Corey's email)
• 1x Alumina spacer (D1102007)
• 1x Baseplate (D1102003)
• 1x Q3000 QPD
• 1x QPD hood (D1102006)
• 2x SHCS 1/4-20 X .75" 18-8 VENTED for the baseplate
• 2x 1/4" PEEK washer (D1102010) for the baseplate
• 4x SHCS 4-40 X 3/16" 18-8 Vented for the QPD hood (spec is BSHCS but SHCS works fine)

I confirmed that the baseplate and the WFS  body are electrically isolated from each other.

There were many black spots on the WFS body (2nd pic) as well as the aluminum foil used for wrapping (3rd pic). It seems that this is a result of rubbing of aluminum against aluminum. I cannot wipe it off but this should be aluminum powder and not some organic material.

QPD orientation is such that the tab on the can is at 1:30 o'clock position seen from the  front (4th pic). You cannot tell it from the picture but there's a hole punched to the side of the can.

Clean SMP - dirty SMA cables are in a bag inside the other clean room in the optics lab. DB25 interface cable is being made (or was made?) by Fil.

J. Freed, S. Dwyer

Yesterday we did damping loop injections on all 6 BOSEMs on the PR3 M1. PR3 shows quite alot of coupling in the 10-25Hz range. This is a continuation of the work done previously for ITMX, ITMY, and PR2

As some signals were quite strong, instead of gain of 750, gains of 300 and 600 were collected (300 is labled as low_noise). Also, this time injections were performed in diaggui instead of awggui

The plots, code, and flagged frequencies are located at /ligo/home/joshua.freed/20241021/scrpts. While the diaggui files are at /ligo/home/joshua.freed/20241021/data. This time, 600 gain data was also saved as a reference in the diaggui files (see below), saved in 20241021_H1SUSPR3_M1_OSEMNoise_T3.xml

pr3.png Shows all results for PR3 with the top half being at 300 gain and the bottom being at 600 gain. All sensors showed strong coupling in 10-25Hz range at 600 gain. [LF, RT, T2, T3] showed strong coupling in 10-25Hz range at 300 gain. [SD, T1] instead showed some coupling in the 46-48Hz range at 300 gain. I am unsure if this is signifficant or another noise source while the test was performed.