(Sheila, Alexa)

We measured the fiber coming out of the single-mode optical fiber at several locations. During the measurements the ref cav trans PD is reading .46 volts.

1.7mW from the PSL to the input of the ALS Fiber Distribution Chassis on ISCR1

127uW @ x-ouput of ALS Fiber Distribution Chassis

110uW @ MSR input

80uW @ MSR output

20uW @ EX

In comparison to alog 6341, we had 7.7mW from the PSL with a ref cav trans of 2 volts. So if we align the ref cav we will gain a factor of 4 power.  There was also only a 50% loss in power between the MSR output and EY in comparison to the 75% loss we are seeing. Hopefully we can gain some more power by cleaning the fiber cable.

The beam jitter into the IMC with the PSL in "commissioning mode" was measured. This was done by DC misaligning the IMC in all 4 degrees of freedom (D.O.F.s) separately, and measuring the relative intensity noise (RIN) spectra in IMC transmission at MC2trans QPD and IM4trans QPD. The RIN spectra were calibrated to HG10 mode amplitude in the input beam using the expressions relating cavity eigenmode D.O.F.s to MC mirror D.O.F.s in [1], along with the equations relating transmitted power to misalignment in the presence of an alignment offset and beam jitter which is small compared to the offset.

The results are compared with the requirements for PSL pointing stated in [2] in the first two attached plots. The measured jitter is roughly 1 order of magnitude above the requirements at frequencies greater than a few Hz. This statement comes with a few caveats:

1. The PSL was in "commissioning mode", which is known to be a higher jitter noise environment than the "science mode" (see [3]).

2. Measurements were unfortunately not taken of the RIN in IMC transmission in the nominally perfect alignment state. It's possible therefore that some points on the jitter spectra were limited by 'intrinsic' intensity noise, rather than intensity noise coupled from beam jitter. I will try to get a plot for the intrinsic intensity noise on the same axes in due course.

3. Beam centering on the IMC transmission QPDs may have been an issue. The beam on MC2trans QPD was well centered, as expected since this is part of the WFS loop, but the beam on IM4trans QPD was quite high (see attached jpeg of the DC QPD MEDM readouts). For this reason I trust results from MC2trans more, because if there was clipping (as is more likely on IM4trans) this would also couple the IM4trans QPD motion into the measured RIN.

Interestingly, it looks like tilts contribute more to the input beam jitter than shifts (blue and red lines in the plots are lower than the green and yellow lines). This is what one might expect if the main jitter sources are after the mode matching telescope on the PSL, because components after this point are only around 1/4 of a Rayleigh range from the IMC waist. There might be some more information to be gained about which components cause jitter at which frequencies by looking at the difference between certain peaks in different D.O.F. jitter spectra.

I have attached the Matlab analysis script to produce the calibrated plots from the DTT data. The data files can be found in /ligo/home/controls/paul.fulda

[1] https://dcc.ligo.org/LIGO-P1000135

[2] https://dcc.ligo.org/LIGO-T0900142

[3] https://dcc.ligo.org/LIGO-T1300368

    On Friday I took the transfer function and power spectra data for phase 1b testing of the 3IFO-OMC suspension. The data has been plotted and compares favorably with the already pass Phase 1b testing data from H1-OMC. The plots are attached below and are ready for review by the testing group.  

The file is currently at ~controls/sballmer/bin/checkCompiledModel

Usage:
checkCompiledModel mymodel.mdl

Example 1:
==========
controls@opsws3:~ 0$ ./sballmer/bin/checkCompiledModel SIXOSEM_T_STAGE_MASTER.mdl
SIXOSEM_T_STAGE_MASTER.mdl | LastModifiedDate "Thu Oct 11 10:00:18 2012" | h1susmc1 |
SIXOSEM_T_STAGE_MASTER.mdl | LastModifiedDate "Thu Oct 11 10:00:18 2012" | h1susmc3 |
SIXOSEM_T_STAGE_MASTER.mdl | LastModifiedDate "Thu Oct 11 10:00:18 2012" | h1susomc |
SIXOSEM_T_STAGE_MASTER.mdl | LastModifiedDate "Thu Oct 11 10:00:18 2012" | h1suspr2 |
SIXOSEM_T_STAGE_MASTER.mdl | LastModifiedDate "Thu Oct 11 10:00:18 2012" | h1suspr3 |
SIXOSEM_T_STAGE_MASTER.mdl | LastModifiedDate "Thu Oct 11 10:00:18 2012" | h1sussr2 |
SIXOSEM_T_STAGE_MASTER.mdl | LastModifiedDate "Thu Oct 11 10:00:18 2012" | h1sussr3 |


Example 2:
==========
controls@opsws3:~ 0$ ./sballmer/bin/checkCompiledModel h1isiham5.mdl
h1isiham5.mdl | LastModifiedDate "Mon Aug 5 14:22:07 2013" | h1isiham5 | Name "SVN $Id: h1isiham3.mdl 3807 2013-02-13 23:39:29Z hugo.paris@LIGO.ORG $"

Example 3:
==========
controls@opsws3:~ 0$ ./sballmer/bin/checkCompiledModel MC_MASTER.mdl
MC_MASTER.mdl | LastModifiedDate "Thu Jan 24 13:17:13 2013" | h1susmc2 |
MC_MASTER.mdl | LastModifiedDate "Thu Jan 24 13:17:13 2013" | h1susprm |
MC_MASTER.mdl | LastModifiedDate "Thu Jan 24 13:17:13 2013" | h1sussrm |

Example 4:
==========
controls@opsws3:~ 0$ ./sballmer/bin/checkCompiledModel hepitemplate.mdl
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1hpibs | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1hpietmx | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1hpietmy | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1hpiham1 | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1hpiham2 | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1hpiham3 | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1hpiham4 | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1hpiham5 | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1hpiham6 | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1hpiitmx | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1hpiitmy | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1isiham2 | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1isiham3 | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1isiham4 | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1isiham5 | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"
hepitemplate.mdl | LastModifiedDate "Tue Feb 12 09:30:54 2013" | h1isiham6 | Name "SVN $Id: hepitemplate.mdl 3774 2013-02-12 17:32:42Z vincent.lhuillier@LIGO.ORG $"


Code:
=====

#!/bin/bash

# usage:
# checkCompiledModel 
#
# makes a list of all front end codes that use 
# and lists the LastModifiedDate of , as well as
# the SVN Id string
#
# useful for
#  - figuring out which model uses which library
#  - what version things are compiled agains
#
# Author: Stefan Ballmer, 2013/10/20

# parameters
model=$1

TEMPDIR=/tmp/tempDir_checkCompiledModel

files='ls /opt/rtcds/${site}/${ifo}/target/${ifo}*/src/sources.tar.gz'

# make temporary directory
mkdir $TEMPDIR
cd $TEMPDIR

for f in $files
do
  g='echo $f | sed 's/// /g' | awk '{print $6}''
  # echo checking $g
  mkdir $g
  tar -xf $f -C $g
  data='find $g -name $model'
  for d in $data
  do
    lmod='grep LastModifiedDate $d'
    svnstr='grep "SVN $Id" $d'
    echo $model | $lmod  | $g | $svnstr
  done
done

cd ..
rm -rf $TEMPDIR

Jeff Kissel, Stefan Ballmer

We started to modify to local svn copy of the suspension models to include a cleaned-up version of the ODC parts and an IPC sender to the ODC master

Modifications to ODC library:
 - The ODC library parts were cleaned up and repackaged. They are in cds/common/model/ODC.mdl and cds/common/model/ODC_CHAN.mdl. There will be some further changes inside ODC.mdl, but the inputs and outputs won't change any more.
 - We decided to give up full backwards compatibility of the parts to get them clean up. In particular:
   - In ODC.mdl, we changed the number of inputs of the CHANS (bit combiner) block from 31 to 30, because the 31st bit cannot be used anyway (it is reserved for the parity bit)
   - In ODC.mdl, for the COMBINE_ODC block, we added one input for the bitmask and one output for a latched version of the ODC channel for epics.
   - ODC_CHAN.mdl contains a new all-in-one ODC block for use in front-end models (called CHANNEL). (see plots) 
 - Files
       ODC_CHAN.mdl
       ODC.mdl
  
Modifications to SUS master models:
 - ODC_CHANNEL_OUT is now recorded as uint32 at full rate
 - The new, all in one ODC library block (called CHANNEL) was installed (see plots).
 - Its output is routed to the last output of the master model.
 - Updated models:
       OMCS_MASTER.mdl
       HSTS_MASTER.mdl
       TMTS_MASTER.mdl
       QUAD_MASTER.mdl
       HLTS_MASTER.mdl
       BSFM_MASTER.mdl
       MC_MASTER.mdl
 - we also started to update
       HAUX_MASTER.mdl
   which did not have and ODC output at all. Jeff will finish this one tomorrow (as well as a possible merger with HTTS_MASTER.mdl)

Modifications to suspension models
 - Added an ipc link (called H1:{OPTIC}_ODC_IPC) to the new ODC output from the master model
 - Updated models:
       h1sustmsx.mdl
       h1sustmsy.mdl
       h1susprm.mdl
       h1sussrm.mdl
       h1suspr2.mdl
       h1susbs.mdl
       h1suspr3.mdl
       h1sussr2.mdl
       h1sussr3.mdl
       h1susetmx.mdl
       h1susomc.mdl
       h1susetmy.mdl
       h1susmc1.mdl
       h1susmc2.mdl
       h1susitmx.mdl
       h1susitmy.mdl
       h1susmc3.mdl
 - All of them did recompile, but we did not install or run any of them yet.

None of the listed files are in svn yet - Jeff will implement additional changes tomorrow.

We developed and tested a prototype ODC Master model for use in the corner station on the Test Stand.  Screenshots of the model are attached.  

We tested that the 32 bit word calculations all work properly, including the new C library part used to take the BITWISE AND of multiple inputs.  

We also tested the updated C library part for setting a high-order odd parity bit in a 32 bit integer channel, and showed that it worked properly.  

We plan to migrate the new code for ODC Master to the OAF FE machine next.

Additionally, we carefully tested the new DAQ channel type setting "uint32".  We found that the data appears to be written to disk properly in binary, but FrDump and the python FrUtils both display the data as signed integers, so a value of uint32: 2147483654 becomes int32: -2147483642.  

- moved IMC_CUST_OVERVIEW.adl form ioo/h1/medm to ioo/common/medm
- replaced all site-specific occurrences (LHO,lho,H1,h1) with their macro counterparts for 
   ioo/common/medm/IMC_CUST_OVERVIEW.adl and
   ioo/common/medm/IMC_CUST_ODC.adl
- verified that the screens work at bot observatories.

- updated
   sus/common/medm/bsfm/SUS_CUST_BSFM_ODC.adl
   sus/common/medm/hxts/SUS_CUST_HLTS_ODC.adl
   sus/common/medm/hxts/SUS_CUST_HSTS_ODC.adl
   sus/common/medm/omcs/SUS_CUST_OMCS_ODC.adl
   sus/common/medm/quad/SUS_CUST_QUAD_ODC.adl
   sus/common/medm/tmts/SUS_CUST_TMTS_ODC.adl
to include the COMBINE_ODC_BITMASK and a link to the corresponding subsystem. Also updated
   sys/common/medm/SYS_CUST_ODC_CHAMBER.adl
   sys/common/medm/SYS_CUST_ODC_ENDCHAMBER.adl
   sys/common/medm/SYS_CUST_ODC_HAM1.adl
   sys/common/medm/SYS_CUST_ODC_HAM2.adl
   sys/common/medm/SYS_CUST_ODC_HAM3.adl
   sys/common/medm/SYS_CUST_ODC_HAM4.adl
   sys/common/medm/SYS_CUST_ODC_HAM5.adl
   sys/common/medm/SYS_CUST_ODC_HAM6.adl
   sys/common/medm/SYS_CUST_ODC_SITE_OVERVIEW.adl

All changes have been propagated to LLO.

Dave B., Jim B., Patrick T., Richard M., Robert S.

This was an experiment to test a fix to the 'noise' documented in alog 8076.

The problem may be that the sampling method used in the previous code (device support met_one_227b-1.0.1) may have initiated a short stage to purge the air path through the dust monitor before the start of each sample, and this was not happening with the new code (device support met_one_227b_comp_ctrl-1.0.0).

The previous code used this command:
"d" Start Counting (counter controlled): The counter will begin counting and control the count cycle based on the front-panel setting for period (sample time).

From Robert's comments in his original iLIGO code (http://blue.ligo-wa.caltech.edu/apps/epics/3.12.2.pem.llo/release/r3.12.2.PEM.LLO/base/src/drv/ansi/drvDustMetOne227.c):
The sample time is set in the dust monitor. This routine uses the "d" command (dust monitor control) rather than the "c" command (computer control). The advantage is that you can start several monitors almost simultaneously rather than sequentially. The monitor purges for two seconds before starting the sample - important for time stamping the sample. 

The new code uses the following command:
"c" Start Counting (computer controlled): The counter will begin counting without waiting for an even second boundary (quick start). Counting will continue until stopped by the computer. The count cycle should be controlled by the computer.
It may be that the "c" command does not run a purge prior to counting.

I added the following separate command with a short sleep after it before the "c" command and started testing it with the dust monitors in the optics labs:
"g" Active Mode: The counter will enter a mode that prepares it for counting. For example, the air pump may turn on to purge the air path.
It is unclear if this runs for a set period or until it receives the next command.

I added a one second sleep after each iteration through the dust monitors to address the code's high CPU use as well. I also added one second sleeps after caught exceptions in drv227b.cpp to provide some time to read the printed error message.

13:30: I stopped the dust monitor code for the optics labs and started the modified code. The sleep after the "g" command was set to 2 seconds.
14:00: I stopped the modified code, changed the sleep to 5 seconds, and restarted it.
14:14: I stopped the modified code again, changed the sleep back to 2 seconds, and restarted it.
15:00: I stopped the modified code.
- I checked the modified code into subversion. -
18:03: I restarted the modified code in 'screen' on h0epics from /ligo/apps/linux-x86_64/epics-3.14.12.2_long_sc/iocs/dust/dust_met_one_227b_comp_ctrl-1.1.0.

I have attached a plot of the dust counts in the Vacuum Prep Lab over this period. The change appears to have helped.

I will let this run over the weekend.

[Stefan and Kiwamu] (Translated by J. Kissel)

Approximately 2 months ago (see alog 7490), Stefan and Kiwamu modified the output matrix of the IMC's ASC control system, such that the caviy-axis-basis ("DOF" basis) alignment is decoupled with the input pointing alignment.

Jeff K. asked me to write some more details for the procedure of how we did it

Here it is, translated by Jeff.

The procedure of the adjustment :

• Lock IMC and engage all the IMC ASC loops.
• Make sure the output matrix is as follows
  • DOF1 feeds to just MC2 (1.0)
  • DOF2 feeds to MC1 and MC3 (+,+0.5 for Pitch and +,-0.5 for Yaw)
  • DOF4 has all zeroed elements
  • There is only one non-zero element in the DOF3 drive matrix namely H1:IMC-OUTMATRIX_P(Y)_4_3. (Computing the rest of the elements is our goal.)
• Make sure the input matrix is as follows
  • DOFs 1 and 2 are a derived by a linear combination of  WFSA and WFSB
  • DOF 3 is only measured by MC2 TRANS (1.0).
  • DOF4 has all zeroed elements

We're going to use the closed-loop, control output signals for these cross-coupled, cavity-axis-basis, loops as our metric of where the cross-coupled sensors think the cavity axis lies. We will then offset the error point of DOF3 (which controls the input pointing, with the PZT) at DC, to see how this affects all our controlled degrees of freedom (again at DC). Before we get started, there is some residual DC value of this control signal because the static alignment had not yet been tuned, and the integrators in the loops found the best spot for us. To make things easier to calculate later, we can offload this DC alignment control signal to the mirror/actuator basis (after the output matrix that we're trying to make better), such that the cavity-axis-basis control output signal is zero at DC. We have a script that already does this:

• /opt/rtcds/userapps/release/ioo/h1/scripts/imc/mcwfsrelieve
  • This moves the DC output control signal from  H1:IMC-DOF_1(2, 3)_P(Y)_OUTPUT to H1:IMC-MC1(2,3)_PIT(YAW)_OFFSET and H1:IMC-PZT_PIT(YAW)_OFFSET.
  • Now the control output for all three DOFs is zero (or close to zero with some fluctuation since the servos keep running).
• Introduce a small offset at the DOF3 error point in either YAW of PIT (Let's say we do this in PIT)
  • We introduced an offset of 0.2 in H1:IMC-DOF_3_P_OFFSET, which moves the PZT, changing the input pointing
  • This shifts the error point of the DOF3 loop such that it is parked at -0.2.
  • But ALSO, it changes the alignment of the input pointing and therefore of the MC REFL beam on WFSA and WFSB
  • WFSA and WFSB interpret this as the cavity axis changing, which inform DOF1 and DOF2
  • So DOF1 and DOF2 loops move all the mirrors to move in order to realign the cavity eigen axis to where they think it should be.
• Record the newly accumulated, static offset in all three control signals after all the servos settle down
  • This is H1:IMC-DOF_1/2/3_P_OUTPUT
• We have only introduced an offset in DOF3, and we *want* it to only control DOF3. So, we take the control output of DOF1 and DOF2, and compute the [DOF3 > MC1], [DOF3 > MC2], and [DOF3 > MC3] matrix elements of the output matrix to make this true, which "diagonalizes" the cavity-axis-basis. We do so with some maths:
  • DOF3 > MC1 =     (DOF2 OUTPUT) / [DOF2 > MC1]    *   [DOF3 > PZT] / (DOF3 OUTPUT )
  • DOF3 > MC2 =     (DOF1 OUTPUT) / [DOF1 > MC2]    *   [DOF3 > PZT] / (DOF3 OUTPUT )
  • DOF3 > MC3 =     (DOF2 OUTPUT) / [DOF2 > MC3]    *   [DOF3 > PZT] / (DOF3 OUTPUT )
• (or in channel form)
  • H1:IMC-OUTMATRIX_P_1_3 = (H1:IMC-DOF_2_P_OUTPUT)  /  ( H1:IMC-OUTMATRIX_P_1_2) * (H1:IMC-OUTMATRIX_P_4_3 ) / (H1:IMC-DOF_3_P_OUTPUT)
  • H1:IMC-OUTMATRIX_P_3_3 = (H1:IMC-DOF_2_P_OUTPUT)  /  ( H1:IMC-OUTMATRIX_P_1_2) * (H1:IMC-OUTMATRIX_P_4_3 ) / (H1:IMC-DOF_3_P_OUTPUT)
  • H1:IMC-OUTMATRIX_P_2_3 = (H1:IMC-DOF_1_P_OUTPUT)  /  ( H1:IMC-OUTMATRIX_P_2_1) * (H1:IMC-OUTMATRIX_P_4_3 ) / (H1:IMC-DOF_3_P_OUTPUT)

• Turn off the DOF3 pitch offset, enter in these values, and DOF3_PIT is done. (We keep the mirror/actuator basis offsets in place, because this is what the original loops said was the best alignment and we want to consistently return there regardless of whether the cavity-axis-basis loops are on or off.)
• Move on to YAW and do the same process in YAW.

I have written a python script to monitor the eight beam tube vacuum gauges and send emails to cell phones if a vacuum excursion is detected. It runs on sysadmin0 machine in the control room. It samples every 5 minutes, sending emails to John, Kyle, Richard, Ski and myself (both ligo-wa email and cell phone text messages).

code is in /opt/rtcds/userapps/release/cds/h1/scripts/ve_btvac_alarms_emailer.py

btvac = Beam Tube Vacuum.

This script performs the out-of-hours supplemental monitoring linked to the control room Alarm Handler and Wall Display striptools.

After some discussion with the SEI group, I made the following changes to the macro file naming at LHO to make both observatories identical and following the same standard (defined in T1300881)

Removed
opt/rtcds/userapps/release/isi/common/medm/*macro.txt
from the svn - these were originally put there in error by Joe Betzwieser. MEDM screens were not affected by that on either site.

Moved
hpi/h1/medm/hepi/hepi$(chamber)_overview_macro.txt
to 
hpi/h1/medm/hepitemplate/H1_hpi$(chamber)_overview_macro.txt

This makes the hpi macro file names and locations consistent between the two sites.
I updated the H1 site map, which was the only medm screens affected.

Moved
isi/h1/medm/{bsc/ham}isi/isi$(chamber)_overview_macro.txt
to
isi/h1/medm/{bsc/ham}isi/H1_isi$(chamber)_overview_macro.txt

This affected the following medm screens:
cds/h1/medm/SITEMAP.adl  (the main sitemap)  
isc/h1/medm/H1IFO_ALIGN.adl
ioo/h1/medm/H1IOO-MC.adl
ioo/h1/medm/IMC_CUST_OVERVIEW.adl
all of them were updated and checked in.



ODC screen work

updated 
hpi/common/medm/hepitemplate/HPI_CUST_CHAMBER_ODC.adl
isi/common/medm/bscisi/ISI_CUST_CHAMBER_ODC.adl
isi/common/medm/hamisi/ISI_CUST_CHAMBER_ODC.adl
as well as the sys/common/medm/SYS_CUST_ODC*.adl files
to include the ODC mask and a link to the corresponding subsystem medm screen.
those files were also propagated to LLO, and the links now seem to work for both sites.

Next: same thing for SUS

•	Moving ISCT EX table from LVEA to air lock at end x -> Apollo
•	The dust monitor (unit#3) that was in the "beer garden" has been moved to the East door side of the BSC3 cleanroom -> Richard 
•	Site fumigation -> Sprague
•	Installing cables into HAM 5 and 6 IO chassis -> Aaron
•	The front end computer was powered down to allow EE work on the IO Chassis of h1sush56 -> David 

Mitchell, Gerardo, Apollo (Scott, Randy, Tyler), Thomas

We got the suspension and the box into chamber and mounted onto stage-0.  The next steps are:

- Photodiode cabling
- Fine-tune alignment
- Check balance
- Set the eddy current dampening gap
- Wipe down
- Swing Back for first contact removal

[Betsy Travis Arnaud]

Today, since BSC2 chamber was accessible, we checked the polarity of the four magnets located on the second mass (M2) of the beamsplitter with the electronic polarity tester.
As we were expecting (see 7693), three of them were flipped (UL UR LR), so Betsy reversed them as in E1100108.

Also, we took the serial numbers of the 10 bosems. They are referenced in the updated chart in E1200343

Attached are some nice pictures of ITMX ETMX BeamSplitter and the baffles