(Alexa, Stefan, Dick)

ISCT1 REFL BEAM Polarization Measurement: We used a cube to measure the polarization of the ISCT1 REFL beam out of the periscope. We found the polarization to be s-pol. 

Optics Added: With the PSL at 1Watt, the power of the ISCT1 REFL beam at the periscope is 0.68W. However, the PD on the table used as a trigger for the shutter saturates at 6mW. Thus, we placed a W1 45S beam splitter with the AR coating in front of the shutter to reflect 2mW of light onto the PD. We also placed an iris in front of the PD to single out the beam. And finally, we placed a lens in front of the PD to reduce the beam size.

Note: One of the shutter controller boxes has been modified (see LIGO-E1300580-v1); however, the top one remains to be changed. 

Tuesday CDS Maintenance Summary

EX front ends (DB,MB,VL,HP):

we started the first version of the following models at EX: h1susetmx, h1sustmsx,h1susauxex,h1susitmx. These were added to the DAQ and the DAQ was restarted.

ITMX SUS and SUSAUXH56  (MB,DB):

The h1susitmx and h1susauxh56 models were started for the first time. They was added to the DAQ and the DAQ was restarted.

Beckhoff EDCU channels (DS,DB):

The latest Beckhoff INI files for the DAQ EDCU were added to the DAQ and the DAQ was restarted.

LDAS QFS maintenance (DM):

Dan performed maintenance on the LDAS QFS system in the LSB, this causes some restarts of h1fw0.

Front End Filter coefiicient loading (JB,DB):

All front ends with partial filter module loads were reloaded to ensure all modules were updated. A problem with the h1susbstst filter file was fixed by Jim and restarted.

Hourly autoburt backup (DB,JB):

This system stopped working after the epics upgrade to U12.04. It was reset back to the earlier version of EPICS and is now working again. Some out-of-date autoBurt.req files are causing problems with this system and are being worked.

New ASC LSC models (MB.DB):

First versions of the h1asctt and h1omc models were built and installed. They were added to the DAQ and the DAQ was restarted.

MSR temperature EDCU (DB):

The Beckhoff readout of the MSR temperature was added to the EDCU and the DAQ was, you guessed it, restarted.

CDS OVERVIEW MEDM (DB):

Modified to show all the new models which have been added today.

As a follow up to Stefan's alog, we closed the MSR doors and turned the fan off at 2:20pm to see what temp the room would reach while running with the nominal two cooling units. The attached plot shows a quick increase in about 30 mins from 25.5 to 27.5 degC. At this point the polarizer located in the MSR1 rack drifted and caused problems with the commissioning work. We abandoned our tests and returned the MSR back to its original doors-open-and-fan-running configuration. The temp came back to its 25.5 stable state in about 30 mins.

John W., Kyle R. 

Recap-
A few weeks ago we connected a leak detector to the exhaust of the YBM turbo pump in order to revisit and quantify a known leak at GV6's lead-screw area -> we were unable to do this at that time as the helium background signal was 2 x 10-6 torr*L/sec, i.e. larger than the signal we were trying to quantify! -> We assumed that this "background" helium had entered the vacuum system via permeation through the viton O-rings of GV1's annulus (these had been sprayed a few weeks ago while hunting for a leak on GV1) -> Once in the system, helium won't go away nominally as the 80K pumps don't pump helium and the big ion pumps are poor helium pumps when unsaturated and non-helium pumps once saturated.  As such, we have been valving-in the YBM turbo pump during the day (must be "attended") in order to remove the lingering helium. This has been working but it is slower than expected.  Instrument air was then used to pressurize the air-side of GV1's outer O-ring(s) followed by venting then pumping the annulus volume to assure that helium was no longer in contact with the O-rings, i.e. remove the source if still present.  This had no observable effect.  Removal via the YBM turbo is so slow that we now need more data to have confidence that our helium source assumption is correct.

Today- 
We opened GV8 for a 1/2 hour or so and observed that the helium signal (LD backing YBM turbo) fell off by a factor of ~2 or so i.e. the soft-closed GV8 had been a barrier to the high helium background originating from the Corner Station -> Hard-closing GV1 reduced the signal some confirming what we already suspected, that being, the helium source is between GV8-GV4-GV1 -> Stroking GV1 closed-open-closed-open, i.e. exercising its lead-screw bellows didn't result in a lasting change in the equilibrium signal.  

Tomorrow we will vent/pump other annulus volumes that have been sprayed with helium at some point in the past

We removed the iLIGO Support Table first; it had been used as a Jig for the attachment of the Support Tubes to the external Crossbeams.  We've got 1/2 of the 16 Tube Stiffening Brackets on.  It is a bit slower than I expected but we should complete by noon tomorrow.

Thanks to Scott & Bubba

In https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=6939, the geophones calibration and the change of basis matrices were checked and confirmed right. This afternoon, the IPS calibration was checked (on BS)

-1: Dial indicators were installed on the HEPI structure.
-2: HEPI is controlled in position
-3: A 500micrometers command is applied in the X direction (tested in Y direction as well)
-4: A19mils (475 micrometers) move is seen at the dial indicators. The 1 mil missing is attributed the hysteresis of the dial indicator

The calibration and the change of basis matrix used by the IPS is right.

Note that the change of base matrix currently installed at BSC6 (since the beginning of the HIFO-Y) underestimates displacements in the X and Y directions by 2.

- Corey and Keita to End-X, TMS work.
- Mike V and Thomas V to LVEA, OpLev related work.
- P-cal team to H2 PSL enclosure for P-cal work.
- John and Kyle, vacuum work at the corner station, GV1 and GV8 were exercised.
- MCB team visiting End-X to prepare for installation work.
- Cyrus R and Jim B, new ubuntu software for ops workstation, and other work see WP#4020
- Other CDS reboots.

(Alexa, Dave, Stefan)

While Dave was running a heat test in the MSR, we noticed that the fiber power (in the right polarization) dropped and the fiber transmitted wrong polarization increased. Attached are the trends of the two channels over the past two hours. Dave commenced his test one hour ago, where the transitions are evident and immediate.

On the BSC2 HEPI system, the valve of on actuator V4 was changed on june 25. When trying to identify the source of the problem, the fluid flow was stopped at the problematic actuator. Then, we saw a huge change in the actuator positionning indicating there was an issue with the valve (No drive - flow vs No flow). Yesterday, we stopped the flow on all actuators and looked for large changes (comparing the No drive - flow vs No flow configurations). Some minor changes were seen but nothing is alarming.
The attachment shows the position changes (seen by the IPSs) when stopping/starting the flow. (units 650counts/mil). 

The HEPI and the BSC-ISI models were installed at the end station (EX).

Control room software has been updated to use Ubuntu 12.04 compiled versions.  This affects the following:

awgstream
dataviewer
medm
StripTool
diaggui,
awggui,
diag,
chndump,
ezca*,
foton,
nds_query,
nds2-tunnel,
nds2_channel_source,
root

and libraries fftw, framecpp, libframe, metaio, as well as gds libraries.

In particular, Perl and Python scripts which use gds libraries should be checked for proper functionality.

Please log out, and log back in to ensure that all processes are using the newer libraries before deciding that your software is broken.

Also note that workstation opsws6, opsws8, and operator0 are still running Ubuntu 11.04, and may have difficulty running any new programs.

Attached are plots of dust counts requested from 5 PM July 7 to 5 PM July 8.

Unusually high counts at end Y.

Attached are plots of dust counts requested from 5 PM June July 2 to 5 PM July 3.

Attached are plots of dust counts requested from 5 PM July 1 to 5 PM July 2.

Attached are plots of dust counts requested from 5 PM June 30 to 5 PM July 1.

New damping filters installed on ETMY main chain (version 2.1).

From now on, the gain value will be included in the "rolloff" filter, and the extra "lock" filter is included in "boost". The sign convention is -1 (cf attached picture).

Attached is a spectra of top mass osem sensors in the longitudinal degree of freedom, comparing damped spectra with old set of filters, new one and with the suspension undamped.

Tomorrow, I will take an open loop transfer function and plot it against the model. Also, I will need to update the ODC "M0 damp state" bit status.

A new safe.snap has been commited on the svn.

Filters installed from matlab using autoquack

The filters were installed in foton using the matlab "autoquack" function in the script "prepare_toplevel_damping_filters.m" located in /ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ETMY/SAGM0/Scripts/

For now the script ONLY works for etmy top level damping filters, but will soon be modified to become more generic.

I created new models for the X-arm: h1susitmx, h1susex, h1susetmx and h1sustmsx, liaising with Vincent to get some SEI IPC signals defined. All four models have been successfully compiled and installed. They will not be started until tomorrow. Details are as follows.

h1susitmx:

• Cloned h1susitmy
• Changed dcuid to 29 (from 30)
• Changed specific_cpu to 2 (from 3)
• Changed comments to give correct wiring diagram, D1100022-v9
• Changed PCIe inputs and associated EPIC outputs to "...ITMX..."
• Changed main QUAD block to "ITMX"
• Left RFM dummied out but changed two error signals to "...ITMX..."
• Copy'n'pasted all OSEM and OPLEV input signals from l1susitmx (and checked against D1100022-v9)
• Corrected comment about analog input order for H1:ITMx (from H2:ITMy)
• Copy'n'pasted all OSEM and OPLEV output signals from l1susitmx (and checked against D1100022-v9)
• Corrected comment about analog output order for H1:ITMx (from H2:ITMy)
• Changed PCIe output stuff to "...ITMX..."
• Grounded TEST1_In and TEST2_In of ITMX block (had been wired to adc_0_29 and adc_0_30)
• Changed DIO_0 and DIO_1 parts to 2 each of CBO_L32_C0 and CBO_H32_C0 per l1susitmx
• Compiled/installed OK.

h1susauxex:

• Cloned h1susauxex
• Changed all EY to EX, ey to ex, TMSY to TMSX, tmsy to tmsx, ETMY to ETMX and etmy to etmx with text editor
• Changed dcuid to 114 (from 116)
• Checked ADC and DAC connections against D1100022-v9
• Compiled/installed OK.

h1susetmx:

• Cloned h1susetmy
• Changed all ETMY to ETMX and all etmy to etmx with text editor
• Changed host to h1susex (from h1susey) and dcuid to 88 (from 98)
• Changed DIO_0 and DIO_1 parts to 2 each of CBO_L32_C0 and CBO_H32_C0 per l1susetmx
• Changed comments to give correct wiring diagram, D1100022-v9
• Checked ADC and DAC connections against D1100022-v9
• Removed receiver for IPC signal H1:LSC-ETMX_L_SUSETMX, which is being generated as a PCIE signal by h1lsc (whereas H1:LSC-ETMY_L_SUSETMY is correctly RFM).
• Compiled/installed OK.

h1sustmsx:

• Cloned h1sustmsy.mdl
• Changed all TMSY to TMSX, tmsy to tmsx, ETMY to ETMX and etmy to etmx with text editor
• Changed host to h1susex (from h1susey) and dcuid to 89 (from 99)
• Changed DIO_0 and DIO_1 parts to 2 each of CBO_L32_C0 and CBO_H32_C0 per l1sustmsx
• Compile failed due to IPC channels not yet created on SEI side - same channels as for h1susetmx.
• Compiled/installed OK.

8:50 Pablo and Colin to H2 PSL laser enclosure
Corey informed me that he, Virginio and Keita would be working on and off in the end X transmon lab
10:00 Michael R. to H2 PSL laser enclosure
10:54 electric man-lift pickup
well sampling
CP6 filled
Dave rebooted the DAQ for Vincent
1:29 Pablo, Colin, Michael R. and Rick going into H2 PSL laser enclosure
Cyrus took down a network switch, which took down the H1 PSL Beckhoff, H1 PSL video cameras and communication to the dust monitor in the diode room. Switch was rebooted and restored.
all left the H2 PSL laser enclosure