T. Sadecki, J. Kissel

Travis / Hugh can give more details of the problems had during cabling up the H2SUSFMY, but once we got all BOSEMs turned on, and the OSEMINF filters were fixed, it was trivial to close the damping loops on FMY (as it should be!).

All damping loops (ITMY M0, ITMY R0, and FMY M1) are closed and running.

Watchdog levels:
OSEM DC -- +/- 30000
OSEM AC RMS -- 8000
ACT AC RMS -- 25000

Typical watched levels with damping loops closed (and no one mucking around the chamber)
OSEM DC -- ~15000
OSEM AC RMS -- < 150
ACT AC RMS -- < 1000

Crystal chiller flow increased from 14.5 lpm to 15.2 lpm

Diode chiller flow increased from 24 lpm to 28 lpm

Diode chiller pressure at valve underneath table increased from 4.3 bar to 5 bar

J. Batch, J. Kissel

After failed attempts to run diagonalization measurements of the newest QUAD built using DTT (DTT opens, sends excitation out to the suspension as seen on MEDM, runs for the allotted time and stops, but no data is plotted and DTT reports an error message say "Test time out."), Jim found that the framebuilder / daqd process had "somehow lost 30 seconds ... possibly because we unplugged a cable temporarily." I think he's referring to timing cables that may have been plugged/unplugged during the Mass Storage Room gutting.

He has rebooted the frontend, and I have burt restored using the 
${RTCDSROOT}/userapps/release/sus/x1/burtfiles/x1susquad_safe.snap
restore file.

I'm retaking the diag. measurements now, and all is functioning properly.

While on the phone, but still watching the MEDM screens of SUS's in BSC8, I saw the values coming in off the front end freeze. After some investigation, I found that the IOPs for both front ends that control H2SUSITMY and H2SUSFMY had lost their IRIG-B timing -- H2:FEC-28_IRIGB_TIME, H2:FEC-28_IRIGB_TIME were some large red number (normally green and around ~15 us). This also seems to have caused all the running models on those front ends to have a red 0x4000 status with regards to the framebuilder / daqd.

I'm not sure why all this happened, but I've restarted the processes on both front ends and all seems fine...

Work continues on the aLIGO upgrade of the LHO control room and MSR. The iLIGO computing systems have largely been removed, we are now de-cabling both rooms.

EricA CoreyG HughR
Re--WorkPermit 3029
We got 3 vertical and 1 horizontal Actuators connected so 1/2 way there.  We didn't get started on the actual attachment til 1pm so I think we should be able to wrap it up in the morning.  We'll still need to adjust the Springs after all connected but again, maybe we'll be wrapped up early afternoon.

As usual, please be mindful of the dial indicators if you are in their neighborhoods.

D. Cook, J. Oberling

We placed 3 new monuments west of BSC06 at End Y today for use in the in-chamber alignment of the H2 ETMy.  These are labeled IAM-25, IAM-26, and IAM-27 and their coordinates are as follows (units of mm):

• IAM-25
  • X: 3047.0
  • Y: 4008691.75
• IAM-26
  • X: 0.0
  • Y: 4008691.85
• IAM-27
  • X: -200.0
  • Y: 4008691.85

After powering up the FMy satellite boxes and checking that the EE on the outside of the chamber were functioning properly (thanks, Richard), I went in the chamber to look at the in-vacu stuff.  Indeed, the cable that needed an end-to-end swap before the holiday break, had not finished making it to it's connecting octopus cable.  When I tried to seat it, I found that the 225 cable needed helicoils, preventing good connection.  We're hunting tools now to finish helicoiling these (all 3 225 cables need the helicoils) connectors.

I often use HTML tags in my aLOG entries to change fonts or colors in my entry. Sometimes, I forget to close the tag. This causes the rest of the page of logs below it to inherit the property of the tag I left open. (Others have done this / use HTML tags / caused this error -- I say this only to emphasize that it's not just me; it's beside the point).

For example, search the log for my name, and the keyword "/Common/MatlabTools/." This returns several entries (to be sure I demonstrate them getting "infected" by my left-open <font face="courier"> tag). Scroll to entry 1507 (a comment to Jeff Garcia's entry 1506, 5 entries down), and see that all entries below it have their font changed.

EVEN MORE CURIOUS: The bug manifests itself differently on different platforms. On a workstation-like machine ( Ubuntu 10.04 LTS, running FireFox 3.6.24), the open tag affects rest of the page in it entirety. On my laptop (Mac OS X 10.7.2, FireFox 8.0.1) it only affects the headers and footers to the entry (Subsystem/Task, Author and Date, and Title; any attachment indicators), the bodies retain their formatting.

I usually catch this user error, because I run preview before I post, but sometimes it slips. 

Regardless, I think the log should be robust against this sort of user error.

J. Betzwieser, B. Bland, J. Kissel

While trying to turn on H2SUSFMY, post-cartridge install, we noticed two problems with the sensor signals coming in from the OSEMs.
(1) On the input side, the raw ADC channels (H2:SUS-FMY_M1_OSEMINF_*_IN1_DQ) were very small, and oscillating around zero (say, 0 +/- 5 cts).
(2) Just after the compensation filters, the signals (H2:SUS-FMY_M1_OSEMINF_*_OUT_DQ) were large (say, 120000 +/- 5 cts).

The first problem turned out to be that the H2SUSFMY Rack electronics were not powered on. Once turned on, we found a different problem: signals were all 100 +/- 2000 cts, where these channels should never go negative. If centered and the suspension is free the signals should be +15000 +/- 1000. This is still under investigation, stay tuned for further results.

The second problem turned out to be a bug in the OSEMINF deWhite, sat amp compensation filters (installed in FM1 of the H2:SUS-FMY_M1_OSEMINF_* filter banks). These filters were installed with the matlab easyquack/automatic compensation filter generator software suite called using,
${SusSVN}/sus/trunk/Common/MatlabTools/prepare.m
some time ago to test out the program (last time I was at LHO, between Nov 13 and Nov 20, 2011; I didn't aLOG it ). Since, we've discovered a bug in the generator that adds a factor ~6 DC gain to these filters, when they should have a DC gain of 1.

Joe is aware of the bug, and currently fixing it, but in the mean time, in the interest of expediency I've just fixed the bug "by hand," editing the filter text file in foton. These fixed filters have been loaded, and the OSEMINF_*_OUT signals appear as expected (baring in mind the first problem is still there).

Once Joe fixes prepare, we'll try running it again (and I'll aLOG it this time!).

Happy New Year: Glad to be back.

- SUS continuing transfer function measurements on H2 ITMY
- IAS at BSC8 aligning baffles
- H1 PSL flooring crew arrives
- Removing iLIGO piers and cross-beams from HAM2
- Setting MC tubes at H2 output
- UniFirst, Praxair deliveries
- FilibertoC by HAM2, pulling cable

The Control Room is no longer in use as it is being upgraded:

- The daily morning INS meeting is now held in the large OSB Conference Room. Extension 203 will no longer lead you to the INS Meeting.

- The new ops station is across from the Control Room, in the Computer Users Room. There is a roof-cam for deliveries, EPICS alarm handler, MEDM, phones (x202/Gate and x158), an Mac workstation with two monitors and a miniMac with a huge HDTV (will have PIP with roof-cam once we figure that out). If you run Safari on the miniMac (HDTV), you'll see links to see the cameras in the outbuildings. There's still significant fan noise from the Beckhoff SuperMicro rack-mountable test machine and the LDAS tape library. Nevertheless, we are working on damping these noise sources. Eventually, the LDAS tape library will be shut down.

- There is a large CDS antique collection outside of the Control Room for enhancing your productivity at work (not home). Unclaimed items will be discarded.

There were issues with attempting to engage the ITMY M0 and R0 damping filters.  After investigation, the medm filter values for the *COILOUTF_* gains were inconsistent with  earlier changes to these gains. The ITMY M0 and R0 damping filters were last engaged on the LVEA SUS Test Stand with these values just before the BSC8 cartridge install.  Damping functionality can be confirmed with a live dataviewer session displaying the signal damping.

The values have been changed to the following: 

ITMY M0 COILOUTF_*
01/03/2012 before              01/03/2012 AFTER
F1 = -1                        F1 = 1  
F2 = 1                         F2 = 1
F3 = -1                        F3 = -1     
LF = 1                         LF =  -1       
RT = -1                        RT = 1     
SD = 1                         SD =  -1 
--------------------------------------------------
ITMY R0 COILOUTF_*
01/03/2012 before              01/03/2012 AFTER
F1 = -1                        F1 = 1       
F2 = -1                        F2 = 1  
F3 = 1                         F3 = -1   
LF = -1                        LF = 1   
RT = 1                         RT = -1     
SD = 1                         SD =  -1   

(Corey, Eric, Greg, Hugo, Jim)

HAMISI Assy#3

With Assy#3 completing its full suite of Testing, we began prepping this Assy for removal.  First off was removing the Test GS-13s (the locations and serial numbers for these sensors are below).

There were some issues with cables on this assembly in that some of them had single band clamps near the plugs.  Double bands are required for better strain relief and to prevent the cables from coming apart.

HAMISI Assy#1

Actuator Re-alignment & Install

Before disassembling this ISI, Set-Up Bars were installed on the Actuators to maintain their alignment.  Unfortunately, some of the Set-Up Bars weren't torqued down, so we lost their alignment (it was visibly noticeable after we installed them on the re-assemebled Assy#1).  We have since pulled them off and are re-aligning them with the Actuator Alignment Fixture for re-install.

We have maintained location consistency, and the serial #'s/locations of these Actuators are consistent with what was posted in this older elog.

GS-13 Install

The GS13s from Assy#3 were removed, and then put directly on to Assy#1.  We maintained the same locations for both assemblies.  So here is location and S/N info for these Test GS-13s on Assy#1:

• H1: 058
• V1: 049
• H2: 013
• V2: 040
• H3: 068
• V3: 059

I have added in the simulink model the block that enables the interractions between the SUS and the HEPI watchdogs. If the SUS wachdogs trip, HEPI actuation will be stopped.

At midnight (UTC) Dec 31 all H2 front end computers went into a DAQ error state. Their GPS times reset back to Jan 01 2011. This was tracked down to a IOP software error in reading out the IRIG-B card, which was fixed today by a change to tag 2.3.1 RCG. All the H2 IOP systems were recompiled and all front end were power cycled at  approx 13:30. All models were burt restored to 13:00 today.

So all fast front end framed data has been zeroed by the DAQ from 4pm Sat 31st local time to approx 13:30 local time today. Slow channels in the frame were unaffected by this problem.

Attached is a cartoon of the Y-End test stand cartridge alignment monument locations

In anticipation of putting the Arm Cavity Baffle on to the ISI Stage0, we've put the HEPI (and entire Cartridge) on stops at the HEPI Crossbeam Foot.  This lifted the assembly 1 to 2 mils (.001-.002") monitoring the dial indicators.  We also brought in the out board stops (facing inward) on each Foot just to further constrain the position.
In case I don't make it back after the new year please don't forget.  GregG knows the story and where the numbers are recorded.

*** Please don't disturb the dial indicators at the Support Tube ends ***

Once the ACB is mounted up, we'll lift the load off the set screws, back them out of the way and set the payload back where it started.