Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot requested from 5 PM March 17 to 5 PM March 18. Also attached are plots of the modes to show when they were running/acquiring data.

I do not know why dust monitor 4 in the LVEA stopped. It has been acting strangely lately though, with occasional low battery errors. I have restarted it.

There seems to be a very high single spike in the > .3 microns counts in the optics lab.

Data was taken from h1nds1.

mode:
2220 seconds worth of data was unavailable on this server
1440.0 minutes of trend displayed
read(); errno=9
read(); errno=9
T0=13-03-18-00-00-00; Length=86400 (s)
No data output.

status:
T0=13-03-18-00-00-00; Length=86400 (s)
2220 seconds worth of data was unavailable on this server
1440.0 minutes of trend displayed

> .3 microns
T0=13-03-18-00-00-00; Length=86400 (s)
2220 seconds worth of data was unavailable on this server
1440.0 minutes of trend displayed

> .5 microns
T0=13-03-18-00-00-00; Length=86400 (s)
2220 seconds worth of data was unavailable on this server
1440.0 minutes of trend displayed

New TwinCAT installation scripts are available which support:

• All end station code is now run from the same source code, and
• A GUI is available to install, activate and run the PLCs.

This required a change of the target area. All target files are now located in C:SlowControlsTarget which is no longer under subversion control. Source code for the PLC programs is available under C:SlowControlsTwinCATSourceCurrentInterferometer. Program changes should never be applied to the target area directly. The new installation scripts also add the subversion revision number to the target code which in turn is available as an EPICS channel. The archive must be fully committed, otherwise the compile script aborts. When debugging, the revision number is patched to zero (invalid).

References:
Installation of TwinCAT Targets, LIGO-T1300175
Coding Standard for TwinCAT Slow Controls Software, LIGO-E1200225

We(Jim Greg & I) positioned the SEI (Support Tubes) to the correct elevation to put the Cartridge at the correct elevation and position, as best we could.

The vertical is set ~0.025" high (to allow for sag with 10000lbs added) to +1061.0mm.  Nominal height for the Support Tube bottoms would be 1060.4mm nominally putting the Optical Table at 1661.7mm.

We are left with some irreducible horizontal adjustments with the South side needing to go West 3mm and the North side needing to go East 1.5mm but the West and East sides only getting worse if those corrections are made and sitting well within 1/2mm of perfect.  I'll leave the position where it is.

Chris, Kiwamu, Sheila

We tested the picomotors at end Y today, we saw that the hardware is fine for all of them, but we had a lot of problems using the software.  
In the morning the END Y TwinCAT system manager was not working properly, there were some modules in the chassis that were not in the configuration in system manager, although Daniel and Max updated the system manager when they replaced a broken communication module last week.  Patrick updated the system manager again, and saw that PLC2.pro is missing, so none of the ALS laser channels are currently working.  

Once Patrick and Max had fixed that, we were able to control the first two picomotors (M3  (injection path, on the edge of the table) and M6 (injection path center of the table)  from medm screen without problems, but mirrors 3 (dichroic) and 4 (IR QPDs) we were unable to control. (although everything looked fine according to the LEDs on the controller) 

Using the picomotor tester, we were able to control all of the picomotors, by injecting a square wave 0-5V at 500 Hz into the pulse input on the tester.  (The step size needed to see a difference in the position of the mirror is about 1000 steps, so the switch that moves by a single step is not very practical)

I'm not sure what is going on with the last two controllers when we use beckhoff, but I will try to figure it out.  

Also, Kiwamu removed the half wave plate that we put onto the ALS table for the QPD alignment.  

Dust Monitor 1 has a calibration error and is not working - Patrick is working on a replacement. All PSL environmental monitoring channels still offline.

800-820 Arnaud taking measurement on MC1 and MC3 ---coordinated with Doug and Jason

919 Mid Columbia Forklift on site

930 Kiwamu transitioned EY to laser safe

930 Pablo and Michael R working on PCAL annulus near H2 PSL enclosure

1004 Travis pulling soft covers on HAM2

1100-1140 Dave B power cycling h1pemmx, restarting DAQ, SUS-IM

1307 CH2MHILL on site (Ski)

1330 Apollo Sheet Metal delivery

1445 Reverse osmosis unit shut down from clogged filter (H0:FMC-CS_WS_RO_ALARM); fixed by Ski

Based on Corey and Jeff's work last week and with Dave B's help I have made changes to the alarm handler with regard to ETMY and ITMY.

Corey had modified some of the  IOP watchdog MEDM screens to provide a more useful display; for the quads he had changed the old arbitrary "OSEM1-OSEM6" to the more useful "F1, F2, F3, SD, LF, RT ". I have made similar changes to the alarm handler so the operator can quickly tell which OSEM is in alarm state. I used the map data Corey posted in the CDS wiki.

I modified

/opt/rtcds/userapps/release/cds/h1/alarmfiles/h1cds_iop_sus_watchdog_etmy.alhConfig

and

/opt/rtcds/userapps/release/cds/h1/alarmfiles/h1cds_iop_sus_watchdog_itmy.alhConfig

to show the correct OSEM name on both the group field and in the guidance popup. The channel name will still show "OSEM#", however. I updated the changes in the SVN.

Did another hands on touch/look at HAM3.  Touched every connection and detect nothing.  Fluid level unchanged at the Mezzinine reservoir.  Still running steady at 26psi & ~97% max speed.  All's well.

[Chris W., Sheila D., Kiwamu I.]
This is a report from yesterday.

We completed the alignment works which were associated with the TMSY. We accomplished three missions : (1) balancing of the TMSY optical table, (2) alignment of the infrared QPD path on TMSY and (3) alignment of the infrared beam extraction path through a viewport.

TMSY optical table balancing
The optical table (the bottom mass) of the TMSY was re-balanced by shifting the position of an existing small weight, which was attached on the bottom side of the table. A picture of the weight is attached below. The motivation of this mission was to correct a big pitch misalignment which was found after Betsy released tension of the cables [1]. Since the misalignment was largely in pitch according to our observation on the last Thursday, we shifted the existing weight by 2 inch from the original point away from ETMY. This adjustment nicely recovered the alignment. The static pitch offset of the BOSEMs to obtain retro-reflection from ETMY is within a reasonable actuation range. Thus we conclude that we succeeded in re-obtaining the table balance.




Infrared QPD path alignment
This time the issue of the highly transmissive BS at 532 nm [2] was mitigated by introducing a half wave plate to rotate the polarization of the green light such that the reflectivity of the HR surface increases somewhat. Thanks to the half wave plate, which was placed on the launching path on the EY in-air table, the HR beam became barely visible (although Sheila wasn't able to see the spot while I was somehow.) The infrared path on the QPD sled had been about 1.5 mm off in horizontal translation, so we tweaked two steering mirrors which are the ones right before the sled. The path is adjusted with a precision of less than 1 mm by simply looking at the beam spot on the QPDs. A difficulty was to identify the right beam spot as there are lots of ghost beams in the path because the optics are not intended for green light.

Infrared extraction path alignment
This adjustment was much easier than the last alignment missions because the green light was very visible. After we confirmed that the beam hit the center of every optic, we steered the last launching mirror to let the beam go through the bottom middle viewport. The beam was adjusted such that it goes through the center of the viewport glass with a precision of about 5 mm.

Note :
We increased the laser power to make the beam more visible. This needs to be decreased to the point where it used to be.
The half wave plate is still in the path. This needs to be removed.

[1] LHO alog 5810 "Another Round of TMSY De-rubbing"
[2] LHO alog 5774 "50-50 IR beam splitter is a good AR for green"
 

[Deepak N., Rodica M., Chris M.]

Tonights Work:
It turns out that the MC Refl beam is elliptically polarized (we may want to add a polarizer on IOT2L to correct this).  To fix this we used a TFP after the MC Refl periscope.  We then returned to the activity of the prior night which was to use the Faraday as a reference to set the polarization for IM1 so that we could measure the transmissivity.   These values are below.  Note that the values measured for IM4 may change slightly with the final alignment, but IM1 is in the final state.  





Optic
Incident
Transmitted
Trasnmissivity


IM1
151 +- 2 mW
78.5 +- 0.5 uW
520 +- 10 ppm


IM4
165.4 +- 1 mW
389 +- 5 uW
2350 +- 50 ppm


ROM LH1 (BS behind IM4)
389 +- 5 uW
29.4 +- 0.2 uW
7.56 +- 0.15 %



Alignment offsets on the IOO suspensions as of today:


Suspension
Pitch (MC in urad/ IM in cnts)
Yaw (MC in urad/ IM in cnts)


MC1
-46
-3750


MC2
65
137


MC3
320
-4300


IM1
1030
-900


IM2
-700
-520


IM3
3250
-500


IM4
-3250
4250



What is left to do next week:
* Align IM3 and IM4 to PRM/PR2 (this requires IAS to be finished/have irises placed)
* Use a HWP in the Faraday to screw up the polarization and check that PRM retro-reflects.  
* Align the forward rejection beam from the Faraday. 
* Check the placement of the ellipse shaped baffle between the Faraday and IM4 (this also needs to pass the parking beam).
* Check the placement of the MC3 AR baffle.
* Align the IFO Refl beam into HAM 1.
* Align auxiliary beams behind IM4 using the viewport replicator.
* Measure transmissivity of IM4 and the beamsplitters in the paths behind it.
* Check the alignment of MC2 Trans with a red beam.
* Check that MC Refl and IM1 Trans makes it through the viewports using the viewport replicator.
* Assist with aligning the optics behind PR2 using Keita's documented procedure (if time permits).  
* Replace/ remove all temporary things noted in list below.
* Drink beer.

Temporary things:
* Irises near MC1, MC2, and MC3.
* Irises near IM1 and IM2.
* Replace HWP and set the polarization.
* MC3 AR baffle.
* Two mirrors for MC Refl reclamation.
* IAS irises.
* Beamblocks.
* Baffles moved for IAS alignment.
* Tools.
* Replace hard aperture clamps.

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot requested from March 15 01:00 UTC to March 16 00:00 UTC. Also attached are plots of the modes to show when they were running/acquiring data.

Data was taken from h1nds1.

mode:
120 seconds worth of data was unavailable on this server
1380.0 minutes of trend displayed
read(); errno=9
read(); errno=9
T0=13-03-15-01-00-00; Length=82800 (s)
No data output.

status:
120 seconds worth of data was unavailable on this server
1380.0 minutes of trend displayed
read(); errno=9
read(); errno=9
T0=13-03-15-01-00-00; Length=82800 (s)
No data output.

> .3 microns
120 seconds worth of data was unavailable on this server
1380.0 minutes of trend displayed
read(); errno=9
read(); errno=9
T0=13-03-15-01-00-00; Length=82800 (s)
No data output.

> .5 microns
T0=13-03-15-01-00-00; Length=82800 (s)
120 seconds worth of data was unavailable on this server
1380.0 minutes of trend displayed

Safe.snap files were updated for HAM2 and HAM3 ISIs, so they comply with the latest model/screen updates.

The new safe.snap files are commited under the SVN:
HAM2-ISI - r3992
HAM3-ISI - r3993

Pictures of the state of the ISIs, at the snap, are attached.

I updated the safe.snaps for the IOP models in the corner station (the non-test stand ones). Main changes are in handling the alarm levels of channels associated with the software watchogs.

When I tried to burt restore the h1iopsusquadtst safe.snap settings, the epics process for this front end crashed. This is reproducible, so I'll stop the upgrade for today and fix this on monday.

Was poking around H1 SUS ITMY to try and assess SUS sensor noise, and found that ITMY needed some infrastructure TLC similar the HAM SUS. 
- CART2EUL and EUL2CART matrices were still using H2 values, so I've updated them
- OSEMINF to_um calibration in FM5 was old, stale, and off. It's now correct, fresh, and ON.
- Stuck from_um anti-calibration filters is the DAMP filter banks such that we can use the same loops.
 
I've since captured a new safe.snap, and committed both the new filter file and h1susitmy_safe.snap to the userapps repo.

Today, I swapped the sketchy top mass blade tip EQ stops on MC1 (or, better known as the one near the center of the table).  IO will readjust this suspension to continue alignment.

Betsy, Travis, Jason

Indeed, things went too well earlier in the week.  This morning we spent a few hours diagnosing why the beam was low on the PR3 after transiting through the PLX (although the PLX assy was level and the incoming IAS beam was verified to be at the correct height).  We finally resolved to pitch the PLX in order to center the beam on the PR3 center and move on.  We then spent many hours this afternoon walking the PR3 pitch everywhere but onto the nominal alignment.  After pouring through some documentation on the HLTS, we discovered the correct knob to turn (not called out well in documentation, and was not obvious to us QUAD-centric folk).  Just as we were back on track, we *ehem* had a bump of the IAS equipment, so we decided to quit and cut our losses.  Long story short, now that Jason will be with us at LHO next week, we will finish up in ~a few hours Monday morning, bright-eyed-and-bushy-tailed.  Sorry, IO, we need one more day!

Day's Activities:

Code change for HAM-ISI 2 & 3.  Required re-starting model and DAQ around 10am (Barker, Warner)

Photon Calibrator "dirty" Alignment (Daveloza, Rodruck, Savage)

ISCT1 craned into place by Apollo (west side of HAM1)

Betsy/Travis worked mainly in HAM2

Cyrus doing rackwork in out-buildings

Tour in Control Room around 12:30pm

Crew working on baffle in West Bay cleanroom

RO Alarm toward the end of the day

Dust Alarms:

• #8 (cleanroom over HAM1) had a few MAJOR alarms in the morning (but no one was in the cleanroom)
• #4 (BS Test Stand) INVALID Alarm
• --several LAB INVALID Alarms

I added temperature/relative humidity sensors to the dust monitors in the optics lab, vacuum prep lab and bake oven room.

I walked about 300 meters of Y1 this week and took some photos of the beam tube insulation.

Between ports 2 and 3 (a distance of 250m) I counted 35 holes in the insulation. Virtually all of these holes were at taped joints between insulation wraps. These joints occur every 4 feet.

So of 800 taped joints I saw 35 which were violated by rodents. There may have been a few more on the backside of the tube. The photos in this report show some of the holes, some of the "good" taped joints, and some views of the uninsulated bellows regions.

Seems like the problem we had when using a green beam reflected off of a 50-50 IR beam splitter was because of the fact that 50-50 surface for 1064nm works as a very good AR for 532nm.

The BS in question is this: https://dcc.ligo.org/LIGO-E1000671-v1

Corey used a fiber coupled green laser as the source, placed a PBS cube for 532nm to ensure that the P-pol light is transmitted, and used a HWP for 532nm to change the polarization.

There are two beams in reflection, one from 50-50 IR BS surface and one from the back surface. There is one beam spot in transmission, because the 50-50 IR BS surface is very small. Anyway:

On TMS ISC table (and in the arms) the green light has S-polarization, and according to Corey's measurement we're totally screwed.

Now that we know about this, we could either align the red QPD path assuming that there is an invisible beam next to a visible beam at a known distance, or we could place a HWP on the ALS table and inject a wrong polarized beam to see if we get anything.

Corey will write a one-page document and add it to E1000671.