(Randy, Jordan, Jake, Owen, Travis, Gerardo)

Both doors were installed on HAM2, no issues to report.  The usual dance, take one door off, to then move the cleanroom to be able to remove the other door, thank you all for the help moving this cleanroom.  

There are some pecularities that we like to note about the doors, we noted some rust on both flanges of HAM2 -Y and +Y, and some embeded particulate on some of the O-rings, metal type all over, the particles were removed with a clean wipe, however there was a "green" fiber on the +Y door O-ring, outer O-ring, around 11 O'clock, this fiber runs with the seal and not across, so we did not poke at it.

Then we connected an aux cart to the annulus system, and started the pump down, we will add second aux cart to help with pump down.

Next, we like to inspect the viewports on this chamber, but this job is going to require laser safe and no table near the door.  We did note something on the central high quality viewport and we like to take a closer look at it.

On Tues Oli tracked down and made the final move step to get the BBSS (still now named the BS in controls) Oplev signal live.  I uncovered the Oplev and released any errant stops.  SInce the sum was 2k instead of it's nominal 20k, Oli tried driving the BBSS sliders around, no luck, so we went out and looked for the beam in the Oplev box with Jason.  The Oplev Beam is offset in Pitch by a beam diameter at at the diode and roughly centered in yaw.  We are chewing on this.  Since we did not restore the plane of the BBBS to the exact same spot as the BS was we should not have expected the beam to be on the Oplev even if it's pit/yaw is correct, due to translation of the beam.  That said, I would have expected more of a yeaw error, less pitch.  Today we are going to take a peek at the in-air PSL MC flashes to see if we can see anything heading to the output arm which gives us confidence in our IAS pointing alignment on the test stand (and can therefore ignore the oplev).

TITLE: 06/17 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 7mph Gusts, 5mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.12 μm/s 
QUICK SUMMARY: The LVEA is in the laser safe bifurcated state at the moment. SPI, SQZ, BBS, FARO work continues.

J. Freed, J. Kissel, J, Wright, F. Clara

Continuing from 90621 (Notes are stored here). Today we brought the SPI picomoters into play, got caught up on our backlog of alogs, and began probably our toughest opical alignment during install. The periscope...

In order we did:

• Noted some alignment drift as ISI HAM2 was unlocked and damped overnight,
• Got picomotors on SPI overview
• Turned on and made functional IFO demod system, got a live measure of contrast
• Found that FBR_PWRIN_REF was saturating / oscillating 90642
• Turned on HAM2 ISIJ M_C1 picomotors
• Was in ISI_DAMPED_HEPI_OFFLINE all morning, and everything worked excellently
• In Control Room – used M_M1 picomotors to center on HAM2 ISIJ QPD A, easily recovering the M_M1 to M_C1 alignment due to HAM2 unlocking with picomotors. 
• Confirmed M_C1 picomotors were alive, but were getting confusing results from ISI HAM3 QPD B.
• In chamber – used M_C1 to center beam on M_M5
• Tried physically aligning M_M5 to steer beam on to QPDB, ran into issues with irreproducibility of adapter position within the IXM100 mount. Will have to trial, error, and get lucky to get the alignment right.
• Some discrepancy between physical spot position on QPDB vs. what CDS says, also when beam is on one quadrant it’s saturating that quadrant.
• Conclusions:
  • Picomotors are alive, exactly what we need, plenty of range and coordinate system transformations all make sense
  • IFO REF efficiency drift is ominous 90644; that plus limited time resolution of beatnote in CDS makes maximizing efficiency with alignment a challenge so far 
  • We *need* a re-design of the periscope mount for the future – need to design a periscope mount that has 3-axis rotation capability (pitch, yaw, *and* roll of the mount)
  • Likely need to reduce the transimpedance on the QPDB segments channels

J. Freed,

At 9:18:50 this morning our aligned REF IFO started to fluctuate in efficency. (SPI_REFIFO_Efficency_Oscilation_Start.png) This happened before while building SPI in the optics lab; however, then it was happening contiuously, while now our REF IFO was fine until it started happening. 

J. Freed,

WE HAVE DISCOVERED NEGATIVE POWER

The FBR_PWRIN_REF PD that monitors the Power coming from the REF beam of the interferometer has gains alot of noise during certain intervals. Sometimes the noise even goes negative power. The noise is corelated with the frequency difference between the ref beam and the meas beam we set. The lower the frequency difference the higher the noise

TITLE: 06/16 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

LVEA is LASER SAFE (Bifurcated)

HAM2 doors on!!!!

LOG:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          

Jennie W, Jeff K, Josh F

On Monday Betsy, Jeff and Josh got the light aligned from the ISIK breadboarrd in HAM3 to the ISIJ receiver in HAM2 manually while the HAM2/3 ISIs were locked (alog #90621). Then the ISI in HAM2 was unlocked (alog #90620).

This morning pitch was off on QPD A.

This morning Jeff recentred onto optical lever QPD A in HAM2 using M_M1 picomotor mirror. See pic. The SUM_OUT of the QPD was around 23.9V at 16:45 UTC.

Then we attempted to do the same for the optical lever QPD B in HAM3 using the ISIJ picomotor. See pic.

Jeff and Fil relocated the IOT2L picomotor driver in order to drive the ISIJ picomotor in this alog.

We were not finding a good point where we could center the beam solely with the picomotors so Jeff went in chamber and we were near the edge of the M_M5 pericope mirror.

I used the ISIJ picomotor to center on the first periscope mirror M_M5, but the alignment downstream from the periscope is still ongoing.

We could not center the beam on the QPD B so that it was equally on all four quadrants and we saw clipping on the beamsplitter in front of the QPD B, M_B4.

Picomotor is  now functional but now we need to do the correct thing; center the beam on M_M5, then use M_M5 to center on QPD B.

Centering on M_M5 with the picomotor was simple. Some notes for next time: moving left on the ISIJ picomotor moves the beam in +Y on the QPD and moving down on the picomotor moves up (or +Z) . Use the speed 'jog' on the picomotor and steps of 100 counts to see motion, finer steps of 10 are needed to do fine adjustment.

Eventually Jeff realised we needed to roll the periscope mount in RZ to change the pitch alignment in the QPD B local coordinates which is hard to get fine adjustment on as the whole mount must be moved and then the set screw re-tightened which can then again move the alignment. Yaw adjustment is done with the alignment screws on the mount so once we get pitch adjusted we can improve yaw.

Conclusions:

• Picomotors are alive, exactly what we need, plenty of range and coordinate system transformations all make sense
• We *need* a re-design of the periscope mount for the future – need to design a periscope mount that has 3-axis rotation capability (pitch, yaw, *and* roll of the mount)
• Likely need to reduce the transimpedance on the QPDB segments channels as each segment seems to saturate at 20V in the moves we were doing.

J. Kissel, F. Clara

In order to get SPI ISIJ HAM2 picomotors for M_C1 functional, Fil and I pulled the production Picomotor Controller 5 from on top of IOT2L (which is away, parked over by HAM3 while the HAM2 doors are off), and move it back to near HAM2, next to SUS-R1, resting on the cable tray. We plugged in its production cabling as designed.

It worked! 

The M_C1 horizontal and vertical picomotors are channel 7 on PICO B, or Controller 5, driven by ECAT chassis Corner 2.
[1] D2400111 SPI Wiring Diagram
[2] D1900511 ISC Wiring Diagram
[3] D1100683 EtherCAT (Beckhoff) System Diagram

See WP 13325.  The Liquid Level Control Valve was cut out of the decomissioned CP4 N2 dewar system.  The ends of the remaining piping were plugged with rubber stoppers and then covered with rubber caps held in place by pipe clamps.  We are looking into a more permanent solution for capping the pipes off, but LLO needs the valve ASAP so this temporary solution will do for now.  The valve is in shipping and receiving and will ship out tomorrow morning.

J. Kissel, J. Wright, J. Freed

Now that we've got the SPI in chamber and moving things along with beams (LHO:90621), it was time to make another run through the MEDM screens and infrastructure (last touched during the initial release of the screens LHO:90006) to make sure the signals flow as intented and the UIUX has everything it needs.

This morning we:
    - Added linked to the picomotor control to the overview
    - turned on inputs, outputs, and set gains to 1.0 to make sure IFO PDs were demodulated and producing a legit live contrast estimate with the amplitude and mean of the PD signals
    - turned on inputs, outputs, and set gains to 1.0 in any bank necessary to make sure optical lever QPDs SUM, PIT, YAW signals made it to the {PIT,YAW}_OUT_DQ channels 
    - added a first-guess low pass -- 4th order butterworth filter with 10 Hz corner frequency -- to the MEAN banks that filter the raw IFO PD signals (with the 4096 Hz beat note on it) to get the mean of the signal.

This needed several mods to MEDM screens that had some missing filter banks:
    in /opt/rtcds/userapps/release/spi/common/medm/
    - Addition of links to picomotor control screens 
         SPI_CUST_OVERVIEW.adl            committed to   rev 35342
    - Added missing HETPHA and HETAMP filter banks at the output of I/Q to AMP/PHASE conversion
         SPI_CUST_IFO_DEMOD.adl           committed to   rev 35337
    - Added missing CONTRAST Filter Banks, and changed the precision of the OUT16 displayed on the screen from truncated (for signals above 1) to decimal.
         SPI_CUST_IFO_MON.adl             committed to   rev 35338.
    - Quick resolution of long-standing bug with labels of banks in 
         SPI_CUST_OL_ISIOUTF.adl          committed to   rev 35336

All of the above settings have been committed to the h1spih23's safe.snap
    /opt/rtcds/userapps/release/spi/h1/burtfiles
         h1spih23_safe.snap               committed to   rev 35340

Ibrahim, Betsy, Anamaria

Upon first in-chamber BBS01 inspection, we found 3 large clumps of spots approximately 100mm from the edge. We're consulting GariLynn at CIT for steps on how to clean.

Acetone swab: We tried to go over the spots with a cotton swab with acetone, but the spots remained.

First contact: We then tried to first contact a small portion with one thin layer, but the spots remained.

While there's no evidence that the beamsplitter was contacted, dinked, touched or scratched in anyway, this might be a cause for the damage. There is texture to the spots upon brushing them with a swab and while it seems more likely that these are above the surface, we are not totally sure.

Hypotheses (and their problems)

1. Peek In-Vac cable scratch: maybe an in-vac cable fell on that area but they would have had to imprint multiple times with some force to show something like this. 

2. Falling foil: maybe a piece of foil fell onto the surface and scratched it that way? No foil was used or wrapped at height during BBS and again, the foil would have had to fall with some heft.

3. There-the-whole-time: Maybe the spots were there the whole time and are invisible to non-chamber conditions. Because this is on the AR side, there is no good scatter plot of the surface. Since we did not see this in normal light conditions, but immediately saw this in chamber (dark) conditions, this may have been there all along. The spots are quite large (as attachments show), so this makes that less likely.

4. Dry first contact: Maybe it's dry first contact? We went over some of the spot with acetone but it stayed. We also first contacted a thin layer on one part but it stayed. The nature of the spots do look like they're small first contact bubbles. We found the first contact sheet that we used on that side and indeed, there are some similar streaks in size but nothing conclusive. We're looking at matching the spot with the first contact to see if there is a streak in this region. Problem is - first contact wouldve come off quick with the acetone treatment. So this is also not likely it.

What to do next:

- Analyze with Dino-Lite: We're going to zoom in on the spots with our DinoLite mount to get a better look. This could tell us if they are truly scratches or stuck particulate.

- Match first contact sheet with spots: Seeing if these spots were visible during FC (done on May 6) - alog 90149. Nothing visible. 

- Anamaria suggested at any rate shining a gaussian beam at it to analyze the damage in a short experiment to characterize. 

A plexi security cover was installed over the SPI Laser Chassis. Cover will be locked under normal operating conditions.

Closes FAMIS 28639

Last checked in alog 89720

TCSX read 30.8 - nothing added

TCSY read 10.6 - nothing added\

No water in small cup under the slow leak

TCSX is reading HIGH PRESSURE FAULT. See attached picture.