Quad test stand maintenance

Betsy reported that the ITMx ETMx assembly team in the staging building were near the point of needing the X1 quad test stand but that it had lost its settings, so I took a look. It turned out that there was no safe.snap file in /opt/rtcds/tst/x1/target/x1susquad/x1susquadepics/burt , so I created a symlink to /opt/rtcds/userapps/trunk/sus/x1/burtfiles/x1susquad_safe.snap which existed from 11/18/11. It also turned out that /opt/rtcds/tst/x1/userapps/release/cds/x1/medm/X1SITEMAP.adl , was pointing to .../userapps/release/sus/common/medm/quad/SUS_CUST_QUAD_OVERVIEW.adl , which was way too new, so I redirected it to .../userapps/release/sus/x1/medm/quad/SUS_CUST_QUAD_OVERVIEW.adl/SUS_CUST_QUAD_OVERVIEW.adl . The preferred commands for getting the sitemap are now sitemap1 for the quad (login as controls) and sitemap2 for the triple (login as controls3).

WHAM4 has ISI Installed--Chamber ready for close-up

As this was our next to last ISI install, everything went pretty smoothly.  No issues but still a lot of work and pretty much non-stop from 9 to noon.  But we got it in and the trolly fixture out by lunch.
After lunch we removed and secured all the lifting/trolly pads and the crane debris cover from the table.
Lockers are loose; ISI held by shipping braces; 4 bolts in and torqued on each side--remainder will be installed when the shipping braces are removed.
Thanks to JimW & Apollo-Zack, Mick, Mark & Bubba

A few photos below show why prep is 95% of the job.  DaleI had a video camera running, we'll see how that went.

h1ecatc1

Patrick and Sheila-

After the fiber swap today, Cheryl pointed out that the beckhoff channels were not working,  the epics channels had values but weren't updating.  

I looked at the PLC in the h1ecatc1 machine, PLC1 was running ( and values were updating) but in PLC2 nothing was updating.  I tried reset all, and then hit run, and the values would update once each time I did that.  I tried stopping the PLC and rerunning the installation scripts, then I tried restarting the computer, the behavior was the same after that.  

Then Patrick took over-

The short version: This seemed to be caused by losing communication to the end Y chassis. The communication was lost because after the fiber cleaning the transmit and receive fiber pairs for this connection were swapped. I have no idea why losing communication to the end Y chassis would stop the values updating in PLC2.

The slightly longer version: Looking at the H1ECATC1 system manager file, there was no communication with the end Y chassis. When I disabled the terminal for this connection, I could get the values to update in PLC2. Later Dave B. swapped the transmit and receive fiber pairs at the end Y EK1521-0010 terminal inside the H1 Corner MSR chassis. I then reenabled this terminal in the system manager and the communication was restored. The PLC2 variables also continued to work. Dave confirmed that the connection inside the chassis did not match our standard and swapped the transmit and receive pairs for end X as well.

OPS Summary

- septic tank servicing
- Jim to SEI test stand to swap cable and reboot
- Cyrus/Filiberto/Jim to EY to hook up fibers
- Pablo in H2 PSL (or H0 LE?) with a laser on, doing p-cal work
- Doug at EX doing IAS work
- Volker in H1 PSL enclosure to look at oscillating ISS (trouble started last week)
- Patrick reboots of weather and dust
- Dave/Vincent multiple DAC reboots
- Sheila EY to Laser Hazard
- Hanford Fire here to check a panel, #9020, OSB, and was OK - probably a small power glitch that cleared itself

Current Issues:
- Beckoff in the LVEA is acting up - Patrick/Sheila/Dave are looking into it

IMC alignment for flashing - no locking due to computer issues today

Alignment 
DOF "slider to match M3 BOSEMs during recent short locks", "slider when last getting short locks"

MC1 changed the most, MC2 and MC3 are essentially the same.

MC1
P 308, 334
Y -921, -895

MC2
P 453, 450
Y 238, 240

MC3
P 224, 224
Y -1009, -1006

ETMx OL/gain/offset values for M0 and R0 levels

Mark B and Travis.

Travis installed the top level OSEMs and retracted them fully. The OL values with gains and offsets are:

prettyOSEMgains(logOLs('X1','QUAD'),'QUAD')

M0F1 -25790     -1.163 12895
M0F2 -29266     -1.025 14633
M0F3 -30618     -0.980 15309
M0LF -24822     -1.209 12411
M0RT -25030     -1.199 12515
M0SD -21983     -1.365 10992
R0F1 -28836     -1.040 14418
R0F2 -22844     -1.313 11422
R0F3 -25991     -1.154 12996
R0LF -26764     -1.121 13382
R0RT -24718     -1.214 12359
R0SD -22399     -1.339 11200

To get this to work I had to add X1 support to both the Matlab functions.

The corresponding serial numbers for these BOSEMs are:

M0F1  502
M0F2  486
M0F3  414
M0LF  580
M0RT  507
M0SD  479
R0F1  426
R0F2  497
R0F3  504
R0LF  468
R0RT  418
R0SD  434

X End status

Doug and Jason worked on monuments.

The Apollo crew worked on modifying the fourth leg of the Test Stand cleanroom. 

Gerardo and I looked at cleanrooms and space available for cryo-pump baffle assembly and install. The Test Stand cleanroom is big enough for assembly and there appears to be enough room for the Balancing Jig in the BSC cleanroom on the far side of the tube. We will take the precaution of covering the concrete floor in that area with CPStat (to mitigate particulate generation) since it has no vinyl.

Beamsplitter phase3b spectra with new filters

Phase 3b spectra have been measured on the beamsplitter after Jeff Kissel implemented the new filters.

The attached pdf are showing a comparison between spectra taken in March 26th phase 3a (in blue), and May 17th phase 3b (in green) with the suspension damped (first pdf) and undamped (second one). The ISI was damped.

Data, measurement lists and figures have been commited on the svn

restarting h1ecatc1

LHO Beam Tube Photos

Robert Schofield is performing vibration measurements on the X1 beam tube at the mid point (1000m).

To facilitate these measurements we asked our contractor to remove ~60 meters of insulation exposing two complete beam tube sections between two bellows.

restarted weather station and dust monitor IOCs

These needed to be restarted after the network work (switch maintenance and fiber cleaning). I burtrestored them to May 19, 00:00.

IOT2L beam profile measurement

(Cheryl, Chris)

In order to set the Gouy phase of the beam on the IMC WFS, we used the NanoScan to check the beam profile after the L3 lens on IOT2L.  Compared to a previous beamscan at this location (alog 5131), it looks like we still have essentially the same beam.  Both the horizontal axis and the vertical axis were measured -- and they differ slightly about where we should place the WFS.  So we will split the difference and place the WFS in between the two indicated positions.

The attached plot shows the measurements, the fits, and the magnitude of the disagreement, which amounts to +/- 10 degrees of Gouy phase.  The upper panel plots the 1/e^2 radius, and the lower panel plots the Gouy phase accumulated from each profile's waist.  The vertical lines correspond to the ideal WFS positions, as indicated by each measurement.  (We want to put the WFS at +/- 1 Rayleigh length from the waist, for a Gouy phase difference of 90 degrees.  At the intermediate position, one profile gives 81 degrees difference and the other gives 98.)

Also to note: the beam path wasn't quite level when we started -- so we had to temporarily remove both L2 and L3 lenses, and touch the M6 steering mirror in order to fix it.  As a result, the MC REFL PD has to be realigned (we'll take care of this today along with placing and aligning the WFS).

IP1 and IP2 gate valves opened fully this morning

IP1 and IP2 were found to be at course vacuum (~1-15 torr) yesterday after aLIGO removal, years of storage and subsequent re-installation.  We had "roughed" them out yesterday, started their HV but had left them only partially open to the vertex volume overnight.   

LVEA SEI Test Stand Computer Timing Restored

The timing on h1seitst has been corrected by replacing the IRIG-B card and attaching the IRIG-B signal to the proper connector.  There are still IPC errors, these may be model related?  The Dolphin network is attached and appears to have initialized correctly.  

Switch Maintenance Complete

All switch maintenance tasks described in WP 3907 are now complete.  sw-msr-gc, sw-msr-ops, sw-msr-server1, and sw-lvea-aux0 were all rebooted to update to IOS v15.0(2)SE2 and apply the configuration changes required to enable jumbo frames.  The trunk configuration for sw-lvea-aux1 was corrected so that this switch could then be added to the VTP domain.

Restarted cdsfs0

Found that main file server cdsfs0 had become read-only.  Restarted at 9:06 AM PDT.

IP1 and IP2 Open Now

(Kyle, John, Gerardo)

IP1 and Ip2 were open to the vacuum system yesterday by 4:00 pm.

An aux cart was used to pump down both ion pumps before their HV was enabled.

No problems to report.

ITMY new damping filters

Spectra on ITMY have been measured after implementing the damping filters recently designed (see aLog 6949)

The attached file shows measurements with the suspension and ISI damped for each level (M0/R0/L1/L2)

• In blue, with old filters
• In green, with new filters

As described in the previous aLog for the same measurement on ETMY (see aLog  6432) the effect the filters should provide above 10 Hz is not visible.

Looking at p22 of the attached pdf, an interesting resonance with a high Q appears at 7Hz for roll, vertical and transverse dofs. A new spectra will be taken tomorrow, to confirm its existence.

The data, pdfs, and measurement list in plotallquad_spectra.m have been commited to the svn.

Plotquad_spectra.m and plotallquad_spectra.m have been modified to automatically scale the plots, depending on the boundaries of the data.

ETMY 3b spectra with new filters

Spectra on ETMY have been measured after implementing the damping filters recently designed (see LLO aLog 6949)

The two attached files are showing measurements respectively with the suspension damped and undamped.

For each of them, three spectra have been measured at LHO :

• In blue, old filters ISI damped
• In red, new filters ISI damped
• In green, new filters ISI isolated (only when the suspension is damped eg on the first pdf)

The improvement provided by the new filters is not visible when comparing blue and red in the first pdf since the signal is drowned in noise from 10Hz (eg p19 of […ALL_Spectra_Don.pdf] representing the motion between the structure and M0 in longitudinal). The difference seen between the two curves is certainly due to the input motion that was different for the two measurements, as we can see on the second pdf when comparing blue and red for damping off (eg p22 of […ALL_Spectra_Doff.pdf] representing roll for M0).

Although, the difference between the two states of the ISI is clearly visible on every stages of the suspension, when comparing red and green (eg every page on […ALL_Spectra_Don.pdf]). The motion (in longitudinal) between the main chain and the reaction chain at L2 stage is reduced by a factor of 100 @ 1Hz when the ISI is isolated (eg p36 of […ALL_Spectra_Don.pdf]).

The data, pdfs, and measurement list in plotallquad_spectra.m have been commited to the svn