Notes For Monday Morning

Dust Monitor 30:  BSC3

While going through Ops Checksheet, and running the dust monitor check, noticed the BSC3 dust monitor froze at around 2:20pmPST on Fri (12/1).  I notified Bartlett (he was already aware) and he is going to need to toggle the RESET button on the dust monitor.

I am probably culpable for the issue with this dust monitor because I ran a START/STOP on it before going in-chamber friday afternoon (it had looked frozen at the time).

ITMx ISI Tripped

Jim had it untripped Fri for a transfer function & will take care of it this morning

IM1 Tripped

Ed redamped

PSL Weekly Report - 10 Day Trends FAMIS #6177

~4-5F temp drops in laser rm and laser table on 11/30 and 12/1 show coincidence with a rising LVEA temp on the 12/1. All other plots look normal.

h1ecatx1 IOC error. Restarted.

Screenshot attached. FRS 5270.

1430 hrs. local -> Kyle on site

Miscellaneous checks.  

1530 hrs. local -> Leaving site now. 

BUBBA ON-SITE TO DEAL WITH R O ISSUES

Leaving site now.

smoke test cancelled today - equipment stored at EY for now

Brian and Jim:

Weather today did not cooperate for the smoke tests I was hoping to run at End Y. It was pretty foggy and the winds were very light. I left the stuff in a box + bag on a metal shelf unit out at the EY building with my name on it. I hope to come back in a month or two and try again.

It was good to be back and see folks, thanks for the hospitality.

-Brian

 

One of the two optics in the IMC bypass removed to send to LLO:

I removed the first optic/Siskyou mount in the IMC bypass that's in HAM2, in order to send the Siskyou mount to LLO as promised.

I left the post/fork clamp for the first optic in place on the table.

I did not alter the second optic/mount in the bypass, so this will hasten the process of recovering the bypass alignment next week when the PSL beam is available.

purge air

Verified purge air is fully valved in at corner station.

WHAM5 ISI Table masses positioned & crunched CPS cable

Positioned the [D090]1075 10kg masses on the table top per D1001139 with one small adjustment to clear the ROC heater base dog clamp.  Things might change anyway when we balance so I'll keep the 'as-built' on-going.  Otherwise, they are all in position and bolted down EXCEPT three top masses that are on viton.  If you don't see the four big shiny Ag plated 3/8 SHCS heads, be careful using it as a brace.  The three viton'd masses are the most central in the table and the most -Y and -X.  There are only six stacks on the table so just be careful.

On another note, I found a CPS cable that looks like it was stoutly stepped on evidenced by the copper shielding.  See attached photo of the V1 cable down on Stage0.  Again, be careful where you step; as you know, there are a lot of cables.  I'll check the signal on this sensor and report on its condition.

PSL beam shutter modification

The shutter housing was modified this afternoon by the addition of some (hopefully)
easier to read labels denoting the position of the activating lever.

    It should be noted that the engraving on the lever is easier to read in the
attached photo than it is in reality.

Ops Day Shift Summary

SQZ work in optics lab

Sheila, TJ, Lisa

Here is a quick summary of the work that happened this week in the optics lab to start populating the VOPO Injection Platform.

We:

* located all of the VIP components (thanks to Betsy and others!)
* gathered and cleaned all of the optics that are needed (picture)
* started assembling the optomechanics
* started gathering parts to set up the laser path to make measurements of the SQZ Faraday throughput and isolation

So..all good.

Note: All of the OFI parts that were sitting on the table have been grouped in a corner of the table.

fixed some minor issues with the SoftWare WatchDog MEDM screens (SWWD)

Following the PR3 issues over the weekend, Jeff and I noticed some minor issues with the SWWD MEDM screens.These were:

the three HAM suspension OSEM face/top channels labeled F instead of T

some ADC monitors on the 4-to-1 screen had copy-paste errors

Quad suspensions did not show the ADC reordering (left-right-side are actually side-left-right on these systems)

I corrected these errors, which required some ADL changes and some macro substitution TXT file changes.

h1ecaty1 IOC crashed, restarted

Screenshot attached.

FRS 8220

Looking at the screen, I see "Error code 13 ~~~MYSTERY ERROR~~~ Go Google "ADS Return Codes"

So I did. ADS return codes are from Beckhoff - error 13 is "Port Not Connected"

I think we now have a fix for that in RCG 3.4 and beyond.  Due to EPICS sequencer changes, I had to re-write the EZCA parts in our front-end sequencer code so they are now robust against the (remote) IOC going offline/online.  This will fix the problem when the PSL Beckhoff OPI<->EPICS IOC is restarted, causing the non-real-time part of the PSLISS model to stop.  Thinking about this, it may also apply in this case, where we communicate with a remote IOC on the IFO Beckhoff TwinCAT<->EPICS IOCs

Ops Day Shift Summary

 

direction of the anemometers?

Noted that at about 10 am - 10:04 am PST on top of End Y, the anemometer was pointing to about 20 deg to the -Y of +x and that sensor is not moving very smoothly.
The sensor is on the upper roof, about 1/2 way along Y, and about 8 feet from the +x edge, and about 6 feet up.

10 am = 1196013618 for 600 sec - epics data says that EY is about 360. so this is = north
Perhaps the EY sensor is aligned with north, but need to recheck. 

tconvert 11:00:00 pst -> 1196017218

at 10:59 am, the EX sensor was pointed in the +x direction. It then moved to point in the -Y direction. 

at GPS time 1196017200, the direction reading for EX is 183 deg. 
at ...17254, it moves up to 271 degrees. I think this means that EX wind direction is aligned with the observatory coordiatates. That wind coming from the +x direction reads +180, and wind coming from the -Y direction readys 270. This is not crazy, since wind blowing from -x towards +x would read 0. 

The EndX direction monitor is moving smoothly. I also note that the black hat thing has come off. looks like it used to cover a wire wound resistor and a toggle thing. I do not know what it is supposed to do, but it will probably be happier with the cover replaced. 

By-hand IFO Alignment Success Finally

S. Dwyer, J. Kissel, K. Kawabe, E. Merilh, G. Moreno, C. Vorvick

With the help of all listed above, we were able to complete the entire by-hand, bypassed-input-mode-cleaner, IFO alignment plan, as described in LHO aLOG 39547. This means that the we are confident that the mechanical alignment of the following optics are good enough that we will be able to recover some alignment after we pump down:
    IM1, IM2, IM3, IM4,
    PR2, PR3,
    ITMX, ITMY, BS
    SR2, SR3.
I.e. all of these optics have enough range on their sliders that it's possible to find *an* alignment that sends a beam through the output faraday, can create a michelson fringe, and can retroreflect beams from the ITMs back to PRM.
In closing of the procedure -- after aligning SR2, SR3, and ITMY to steer a michelsom fringing beam through SRM into the OFI -- we went back to PRM, and checked whether the ITMs were still retroreflecting back to PRM. We found their beams in the PRM iris, but a little bit +Y in yaw and a little bit low in pitch. We suspect that this is merely a result of the drift of optics or the input beam over the course of a day's work. 

We were even able to get a little bit further than planned: we checked 
(12) that the IFO beam, incorrectly polarized with a temporary half-wave plate on the OFI, went to ZM2. It did, but the check admittedly not very precise.
(13) SRM alignment by looking for the reflected beam off of SRM. Sadly SRM is out of range of its sliders in pitch. Not a terrible surprise, since this brand new monolithic optic has not yet had its mechanical alignment fine tuned. We'll work with the suspension team to fix this in the coming days.
(14) to see if we could align PRM, by looking for secondary retro-reflections from the ITMs back at PRM. We found secondary reflections, and were able to move them with PRM, but it was too late and we got confused as to which beam was which ITM, so we decided to call it a night. (Note: before playing we restored the alignment to the values that got the REFL beam back into HAM1, so that path is still good -- so far.)

All-in-all, a really successful, power-house of a day. Nice work team!!

What does this leave next?
- Mechanically aligning SRM to get a reflected beam back to the ITMs.
- Exploring PRM sliders to align secondary beams into PRM iris if not well-co-aligned with the forward input beam and the primary reflection.
- Move OMs to catch the new alignment through the OFI
Unfortunately, that means we'll have to reconstruct this alignment tomorrow, but hopefully now that we've gotten this far, it'll be easier to get back to this point faster tomorrow.

Please remember -- no computer / front-end restarts until further notice.


I attach a screenshot of all OSEM values and suspension (plus PSL PZT) slider values at the end of the day, with all optics mentioned above in their desired alignment state.
Also, I attach a more detailed log of the activity.