The contractor is on site to sweep the gravel and rocks off of the access roads at each arm. 

The sweeper machine moves at a very slow pace so please be aware of this when traveling up and down the arms.

I've collected transfer functions for all optics and all DOFs in HAM6.  Everything looks good and we should pump down.  A subset of the results, for OMCS L and OM1,2,3 P are attached; the xml files have been saved and committed to the SUS SVN.

A report on the performance of the seismic isolation subsystem during ER7 at both sites has been compiled on the DCC: G1500811

Summary: 

• High wind adversely affected uptime at LHO during ER7
• SEI watchdogs still trip without any apparent ground motion cause at both sites, but less frequently than one year ago 
• Noted SEI watchdog trip trends (sensors that trip semi-regularly with no apparent cause):
  • BS ST2 GS13 at LLO 
  • HAM 6 ISI CPS at LLO
  • EMTX HEPI actuator and ST1 T240 (within ~10 minutes) at LHO
• No sign of upconversion from trains at LLO, but not many instances of elevated ground motion in 1-3Hz range

ER7-driven requests from DetChar for the SEI team: 

• Work to improve uptime via mitigation of earthquakes and wind-driven ground motion and addressing WD trips uncorrelated with ground motion

To test if NDS clients after tomorrow will correctly apply the upcoming leap second, I injected a sub-second signal into a DAQ DQ channel today. The H1:PEM-EX_ADC_0_08_OUT_DQ channel is a PEM test channel with ADC bit noise on its input. I ran awgstream to inject a signal which is one second long, and all zero except for 1/16th of a second starting at the 0.5S mark. This 1/16th second block is a step function, with an amplitude of 1000 counts.

The time of injection is chosen to be modulo 64 in GPS time, so it will be the first second of a 64second DAQ frame. The time of injection is

The model runs at 16kHz, this channel is acquired to the DAQ at 2048Hz. The decimation filter is producing the ringing seen at the step transitions.

Gerardo, Bubba, Kyle 

Installed HAM6 East and South Doors 

***Noticed many scratches on HAM6 East Door chamber flange - yes, where the door O-rings contact -> This is due to the fact that spring clamps have been used to secure the soft-covers to prevent the purge-air from blowing them off as is the norm but, unlike the normal case, for this flange, the O-rings are located in grooves on the door instead of the chamber.  As such, the O-ring protectors are on the door and not the chamber.  So, the spring clamps clamp against the machined sealing surface of the chamber flange and only the C3 fabric acts as a barrier between the steel clamps and the steel flange and scratching is inevitable.  Let us not do this again!  In the future, O-ring protectors should be installed on the chamber flange in addition to the door flange for this special case.  


Kyle, Gerardo 

Connected pump carts to HAM5 and HAM6 annulus pump ports -> Began pumping annuli(?) -> Will pump HAM6 tomorrow.

I repeated the charge measurements on both ETMX and ETMY. Plots are attached.

I was working on FF on HAM2 and when I looked at HAM3 for comparison, I saw that the GS-13's have a 23 hz comb. My first thought was some vacuum component, but Kyle says he doesn't have anything running in the area. Near as I can tell it starts at about 9 am local on Friday. Unsure of the cause, but I need to run. I'll look some more tomorrow.

LVEA: Laser Safe
Observation Bit: Commissioning 

07:15 S&K Electric – Running conduit on Y-Arm near end station
08:35 Christina & Karen – Cleaning in LVEA
09:07 Jodi – Going to End-Y and End-X to check property tags
09:10 Bubba – Going to End-X – Will be in VEA and mechanical room
09:43 Richard – Going to End-Y to check on electrical work
10:17 Hugh & Jeff B. – Going to HAM6 for CC closeout tasks
10:23 Jason & Ed – Going to End-X to adjust OpLev laser
10:23 Jim – Going to HAM5 to check for rubbing
10:32 Richard – Back from End-Y
10:52 Jason & Ed – Back from End-X
11:00 Jodi – Back from end stations
11:05 Corey – Going to HAM6 to take photographs
11:12 Corey – Out of LVEA
11:19 Christina & Karen – Cleaning at End-Y
11:24 Hugh & Jeff – Out of LVEA
11:54 Christina & Karen – Cleaning at End-X
12:34 Jim – FF testing on HAM2
12:35 Christina & Karen – finished at End-X
12:36 Hanford alarm testing
13:25 Gerardo – Going to HAM6 to prep for door install
13:43 S&K Electric – Out of Y-Arm beam tube – Electrical work at End-Y
13:45 Door crew at HAM6
14:27 Filiberto – In LVEA near X-Arm to stage for vacuum Beckhoff work
15:06 Brutzman’s on site to finish cubical installation
15:20 S&K Electric – Out of End-Y
15:27 Jeff – Going into CER
15:45 Door crew finished at HAM6
15:57 Kyle – Going to End-X to recover parts and equipment

PSL Status: 
SysStat: All Green, except VB program offline & LRA out of range **
Output power: 32.9w  
Frontend Watch: Green
HPO Watch: Red

PMC:
Locked: 6 days, 2 hours, 22 minutes
Reflected power:    2.6w
Transmitted power: 23.1w 
Total Power:       25.7w 

ISS:
Diffracted power: 5.6%
Last saturation event: 0 days, 4 hours, 44 minutes 

FSS:
Locked: 6 days, 2 hours, 21 minutes
Trans PD: 1.190v

**   The Crystal chiller had a low water alarm. I added 400ml of water.  

SEI:	
HAM6 close out and door install
Looking into some issues with HAM5
Running FF testing on HAM2

SUS:	
ETM charge levels are still good. They will be monitored to see if they return
Investigating 2 BOSEMs on TMS-X which are not responsive 

CDS:	
Working on mods to Beckhoff chassis in corner station

NOTES:	
There will be an Internet access outage on Tuesday from 09:00 to 10:00
Stripe Rite will be on site Tuesday to sweep along the X and Y beam tubes  

While following up some hVeto results, I came across some very strange signal in ISI-HAM4_BLND_GS13Y. It's also in X and Z - I haven't checked other degrees of freedom or the raw GS13 signals. For several days, there's a sweep from ~700 Hz to 1024 (Nyquist) once per second. It doesn't seem to be quite aligned with the second. The first plot is an Omega scan that shows what it looks like.

The second plot shows the onset at June 9 16:49:54 UTC. The only thing I can find in the log is a restart of h1susb123 at 11:50 local (alog). I think this channel is SEI not SUS but maybe they share a front-end machine? The problem looks to be continuous until about June 13 21:30 UTC, third plot. I don't know what fixed it. There's more digging in we can do if needed. This is not a huge problem for detchar, the sudden change in the channel just caused some weird results in hVeto. We probably should be ignoring the high-frequency part of the signal anyway.

Leonid.Prokhorov, Jeffrey.Kissel

We repeated the charge measurements on both ETMX and ETMY. Results are close to yesterday's one. Plots of all measured data after discharging are attached.

In the morning we found both ESD drivers off and reset it (see alog 19341).

Today we have the scattering of data points for ETMY lower than yesterday with unknown reason. 
We presumed that it may be due to the optical levers centering and check the alighnment at last 3 days. 
for ETMY: Alignment was not very good today 0..-6(pitch) and -1..-2.5 (yaw), while there is the minimal scattering. The better alignment was at June, 24: -0.5..0.2 (pitch) and 0..0.3(yaw), when we have larger scattering.
for ETMX: Scattering seems more or less the same for all days, while OPLEV centering is really different (+6(pitch) and -10(yaw) at June, 24; -1(pitch) and 0..-0.2(yaw) at June, 25; 0.5..2(pitch) and -0.4..0.2(yaw) at June, 26)
So it seems like there is no correlation between alignment of optical levers and scattering of measured charge.

Sign of the pitch and yaw response on excitation with different bias voltage for ETMY was the same as in yesterday measurements, see plot.

Ring Heater screen

• I made the ring graphics go red when Measure Power is >0.1 instead of Set Power !=0  to avoid the confusion when there is no power fed to the ring heater.

Ops Overview:

• Added graphics that tell you when a ring heater is on. Still no warning for unequal power between the top and the bottom ring heater (Maybe TJ could make Guardian scream?)
• Added (chiller) flow alarm, laser status, and laser power for both ITMX and ITMY.
• Flow alarm tripped will cause the CO2 laser to shutdown afterward. The chillers are on the mezzanine in mechanical area. If I'm not around the operator on shift should go check on them as soon as possible especially during the science run and CO2 laser is being used.
• Laser power notifications will go red when the CO2 laser power is < 50W
• TCS buttons now lead you straight to CO2 laser medm screen. Red color means the CO2 laser is not ready (ITMY should stay red for another while)

Bubba  Gerardo 

We moved 3 clean rooms, several tables, and miscellaneous items left in clean rooms and on tables from HAM 6 area to a location in front of the Hi-Bay.

 We now have access for the east door to be installed and with a few strategic crane/fork lift moves, the south door will be ready to install.

 The garbing room remains powered up and in the same position as this week until the south door is ready for install, therefore travel on the south side of H-1 output is still restricted.

I noticed this morning (through the Detchar pages, very sad that last nights SEI data isn't available) that the HAM5 ISI has not been doing well since about the time HAM6 vent activities started. Sadly this casts some doubt on the feedforward data I posted the other day, so I re-evaluated the performance at HAM4 while I was digging into HAM5. My first image shows the difference between HAM's 4 & 5 in the Y direction, all the other DOFs look similar. Second image shows the rotational dof's of HEPI L4C's on the two chambers, and HAM5 sees al lot more motion than HAM4 (dashed lines are HAM5, solid are HAM4). The translations are messier, (third image) but still seem to indicate more motion at HAM5. Hugh reports finding a few mechanical contacts at the chamber while he was working on HAM6, so I'll wait to panic about HAM5 until after that mess is cleaned up. Jeff is filing a report with FRS on this.

On to doing a better evaluation of RY feedforward on HAM'S : the fourth image shows the healthy HAM4 RY feed forward, dashed lines are off, solid are on. Fifth image shows that turning RY FF on has not spoiled the X performance.

Last two images show HAM4's Y and Z feedforward performance, with the same dashed/solid off/on convention.

Matt H, Bubba G, Greg G, Jeff B, Calum T (remotely), Eddie Sanchez (remotely)

If you remember from yesterday with all the glass pieces of the OMC shroud in we had a cable interference with the shroud (see pic 2424).
 After playing with the cables the decision was made to pull the two interfering panels out so that the cables would hang free (see pic 2431). This however leaves the to now open and exposed (pic 2459). So after some discussion last night we decided to try to score and snap part of the black glass to stop the interference but also so that we could get the plate back in.

By looking side on (pic 2469) we could use the holes that the capture screws go in a s a guide to where the cables interfere with the black glass and how much glass we wanted to remove.

We decided to remove around 2.25 " (see plate mod pdf)...so it should hopefully look like "OMC3D" pic

With a brand new glass cutter we practiced on some test piece bits of black glass Calum had sent Betsy. The trick is to only do one 'score" with a light but even pressure, and then put the pressure over a raised surface (say a small diameter smooth rod), and then with gentle and even pressure that is spread out, push down and will get it to snap along the score.

Once happy with our technique, we went out and did it to the two real pieces. After of course the old carpenters trick of "measuring twice cutting once" :-) Worked like a charm. John W, gave us a small file (diamond tipped I think) to just gently bevel the edges a tiny bit to take off the sharp corners. That also worked really well. We then cleaned it by blowing it down with top gun, and then in area that snapped giving it a methanol rinse.

It went back in no problems at all. Its done.

Pic 2497.....before pic of one of the glass pieces to be cut

Pic 2498......after its been "modified"

Pic 2504...drying after methanol rinse. Thats the AR coated side you see

Pic 2506 & 2510.....The now complete OMC black glass shroud installed

Filiberto, Patrick

I didn't realized it had been removed, and except for communication errors with the missing chassis, the PLCs ran on without apparent incident.

Filiberto made the same modifications as to the one at end X and reinstalled it. I updated the system manager accordingly, checked it into svn and activated it.

This time I didn't restart the PLCs, but I still had to restart the EPICS IOC. I burtrestored to 6:10 this morning.

In an email conversation Norna had asked what we could do to reduce motion on the HAM's in the RX/RY dofs at 25-35 hz. This morning I took a few measurements to design a FF filter. I've taken a first pass at it and I think I have something that works. Attached spectra are of the ground STS X and GS13s in RY the first png, then both sensors in X on the second plot. The live measurements are with FF on, references are from a quiet time last night, FF off.

The third attachment is a plot from the script I used to do the filter fit. Blue is the filter, green is the ideal fit from the St0 L4C's to the ISI GS13's, red is the fit from the HEPI L4C's to the ISI. The design approach is exactly the same as I talked about in my alog 18045.