The STS-2 at the corner station is currently installed by BSC4 (under the stairs). Since the STS-2 is relatively "far appart" from the BSC1 and BSC2 chambers, I checked the coherence from the STS-2 and the T240s installed in stage 1 of the ISIs. Plots of coherence are presented in attachment. Coherence is really good (in the 100mHz to 3Hz frequency band) but not as good as the end station where the STS-2 is closer from the chamber. Coherence between the stage 1 of the 2 ISIs is also presented.

The isolation filters are ramped up with no DC offsets on the super sensor. Once the platform is isolated, it will be translated and rotated as desired. Tests were performed on ISI-BSC6 to evaluate the risk of saturation on the T240s when tilting the platform. Tests were performed with damping loops on every DOFs. Isolation filter (with BOOST to lock the platform to the ground at DC) was engaged in the RX direction with a blend at 750mHz. Then, the platform was tilted by 100nrad in the RX direction. Time series of all T240s signals were recorded during 600s and presented in attachment.
A 100nrad rotation in RX creates a 5000 count peak on the local inputs and a 22000nm/s velocity peak in the Y direction.

The macro substitution text files of the HAM-ISIs were moved from:

/opt/rtcds/userapps/release/isi/common/medm/hamisi/           (now at revision 4499)

into:

/opt/rtcds/userapps/release/isi/h1/medm/hamisi/                      (now at revision 4498)

The $(IFO) part of the name of those text files was removed to avoid redundancy: i.e. H1_isiham2_overview_macro.txt became: isiham2_overview_macro.txt 

The sitemap was updated to reflect those changes.                 (now at revision 4500)

[Chris W. and Kiwamu]

We have updated, recompiled, reinstalled and restarted the h1iscey model ( per WP#3893). It still runs fine so far.

Main update:

• Removal of the WFS parts
• Removal of the (input and output) matrices in the mass feedback chain
• Reassignment of ADC and DAC channels (per T1100472-v8)
• Renaming of some DCPD signals
• Addition of an infrared transmitted light PD channel and some auxiliary channels
• Upgrade of the QPD libraries
• Addition of the Beckoff communication ADC/DAC channel (which are currently terminated or grounded)

QPDs remain the same

The QPD libraries were upgraded to QPD_WITH_WHITEN_CONTROL, but besides it nothing was changed. Since we haven't edited the rest of the QPD chains, they basically stay the same as before. This is good because we don't have to recover all the servo parameters and so on. I burt-restored the h1iscey and hence the settings came back to what they were in this morning as far as QPDs and their servos are concerned.

DCPDs became different

On the other hand the DCPDs were updated to something almost equivalent to new channels as some of them were renamed and some were deleted and added. Looking at the past DCPD setting Keita and I didn't see any special filters such as anti-whitening. Therefore we decided to abandon whatever the past signal conditioning settings. In case someone wants to remind what they used to be, I took a snapshot of the signal conditioning settings (see the attached). Also I modified the DAQ list so that the output of the DCPD filters are acquired in to DAQ correctly.

Following previous aLOGs related to the sensor correction:
-          Coherence ground to ISI https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=6274
-          Master model modifications + Modification routines + Installation filters + Sensor correction from ground (first results) https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=6319
-          Installation of aggressive controllers https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=6351
-          Coherence Stage 1 to stage 2 https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=6360

I tried to evaluate the contribution of each sensor correction on the suppression. For this test, I used the level 3 controllers (the aggressive ones) on both stages, blend at 250mHz in all DOFs. I measured spectra in the following configurations:
-          No sensor corrections
-          Isolation filters only (blend 250mHz – T240s - Level 3 isolation filters)
-          Only the sensor correction from stage 0 to stage 1 using the STS-2
-          Only the sensor correction from stage 1 to stage 2 using the T240s
-          The sensor correction on both stages.

Spectra of translations and rotations of both stages are presented in attachment.

On the translation DOFs:
Isolation provided by the sensor correction from the ground to stage 1 and from stage 1 to stage 2 are quite similar (red vs cyan). In both cases, the sensor correction improves the isolation from 100mHz to 3Hz. The motion around the blend frequency is also reduced (the CPS low pass filters considerably increase the motion below 250mHz – Blue vs green). When the sensor correction is engaged on both stages (red), the individual suppressions are multiplied.
We can notice some amplification between 40mHz and 100mHz due to the aggressive high pass used for the sensor correction.

On the rotation DOFs:
We can notice on stage 1 in the RZ direction:
- around 250mHz, a huge amplification of the inertial motion when engaging the isolation loops (green vs blue).
- between 40mHz and 100mHz, a huge amplification (x100) due to the sensor correction (red, cyan, purple)
The important amplification is particularly visible  in the RZ direction since the sensor correction  is realized in the X and Y directions (only 1 sensor correction with vertical sensor). The low frequency amplifications are less visible on stage 2 since the GS13s are in their noise floor at low frequency.
Isolation performances on stage 2 seem limited by the noise floor of the super sensor.

I have started measurements to look at the cross coupling at low frequency.

Original file (spectra) can be found at:
https://svn.ligo.caltech.edu/svn/seismic/BSC-ISI/H1/ETMY/Data/Spectra/Isolated/
H1_ISI_ETMY_20130514_152000.xml
H1_ISI_ETMY_Spectra_RX_RY_RZ_Comparison_Sensor_Correction_20130514_152000.txt H1_ISI_ETMY_Spectra_XYZ_Comparison_Sensor_Correction_20130514_152000.txt

With :
Ref 0-14: No control
Ref 15-29: Isolation filters only
Ref 30-44: Isolation filters + Sensor correction using STS-2
Ref 45-59: Isolation filters + Sensor correction using T240
Ref 60-74: Isolation filters + Sensor correction using STS-2 and T240s

This afternoon I tried to lock the PLL at end Y.  One problem was that the phase frequency discriminator was not working, I watched Imon on a scope while I changed the laser temperature to move the beat note from above to below the locking frequency, and saw no change in Imon.  I swapped all the cables over to the PFD on the right side of the board, as you are looking at it from the front, which responded as I thought it would.  The chassis has serial number S1000761, I got a spare (S1000764) from the midstation and swapped them, I've brought the broken chassis into the EE shop.  

I don't know what might have happened, we saw that the power supplied to the whole rack was not right earlier in the afternoon, the power that should have been +18V was +25V, which Daniel has now fixed.  

The prefilter on one of the fan filter units on the northernmost small clean room between HAM 2 and 3 is not in place. (see attached photo)
Michael R., Pablo D. working on PCAL in the H2 laser room. H2 LEA in laser hazard.
Apollo craned a forklift over the X arm for use with the ISI test stand.
Corey G. installed a light pipe for the MC Trans path between HAM2 and IOT2L.
Arnaud P. took spectrum of the ETMY suspension.
Kiwamu I. rebuilt the h1iscey model.
Dave B. removed the corner station weather station channels from the EDCU and restarted the DAQ for this and Kiwamu's changes to h1iscey.
notification from driver that he would arrive in ~ 15 min for LN2 delivery, later alarms at EX CP8
Thomas V. aligning optical lever on top of HAM 3
Cheryl V. installing video camera on west door of HAM 2
Szymon S. running excitations on top mass of ETMY
Corey G. dropping off equipment in the squeezer bay
Michael R., Pablo D. and Laetitia working in the H2 laser room, H2 LEA NOT in laser hazard
PSL shutter opened ~ 4:22 PM

Looking at the REFL baffle will tell me if our current alignment is sufficient to get the REFL beam from the first surface of PRM into HAM1.  When I looked at the beam before, it was slightly clipped on the East side of the aperture of the baffle, so misaligned in yaw.  I have no knowledge of the alignment state of PRM at the time I saw this clipping.  When I have the beam back and a locked IMC, I'll be able to evaluate the REFL/PRM alignment.

FYI - there is currently a yellow viewport cover without stickers on the East HAM2 door - this is not an invitation to remove the viewport cover without a work permit or contacting the Control Room!  I will either switch the viewport cover to one that has stickers, or get the proper stickers for this cover, before we open the PSL shutter.

The area between HAM4 and the high bay/LEA roll-up door was cleared in preparation for the ISI install.  The BSC ISI storage container was flown from that area to the North Bay.  First cleaning was done on HAM4 and its cleanroom (yesterday). The HAM storage container was moved away from HAM4's north side and the bolts were loosened on the south door. Second cleaning will take place ASAP.

The area between HAM4 and the high bay/LEA roll-up door was cleared in preparation for the ISI install.  The BSC ISI storage container was flown from that area to the North Bay.  First cleaning was done on HAM4 and its cleanroom (yesterday). The HAM storage container was moved away from HAM4's north side and the bolts were loosened on the south door. Second cleaning will take place ASAP.

The forklift was flown into the West Bay so that SEI could use it for adding mass to the ISI.

Raised HIGH alarms to 85 deg F

ops@operator0:~ 0$ caput H0:FMC-MY_AH_COOLTEMP_2_DEGF.HIGH 85
Old : H0:FMC-MY_AH_COOLTEMP_2_DEGF.HIGH 75
New : H0:FMC-MY_AH_COOLTEMP_2_DEGF.HIGH 85
ops@operator0:~ 0$ caput H0:FMC-MY_AH_COOLTEMP_1_DEGF.HIGH 85
Old : H0:FMC-MY_AH_COOLTEMP_1_DEGF.HIGH 75
New : H0:FMC-MY_AH_COOLTEMP_1_DEGF.HIGH 85

ops@operator0:~ 0$ caput H0:FMC-MX_AH_COOLTEMP_1_DEGF.HIGH 85
Old : H0:FMC-MX_AH_COOLTEMP_1_DEGF.HIGH 80
New : H0:FMC-MX_AH_COOLTEMP_1_DEGF.HIGH 85
ops@operator0:~ 0$ caput H0:FMC-MX_AH_COOLTEMP_2_DEGF.HIGH 85
Old : H0:FMC-MX_AH_COOLTEMP_2_DEGF.HIGH 80
New : H0:FMC-MX_AH_COOLTEMP_2_DEGF.HIGH 85

ops@operator0:~ 0$ caput H0:FMC-MY_VEA_202A_DEGF.HIGH 85
Old : H0:FMC-MY_VEA_202A_DEGF.HIGH   75
New : H0:FMC-MY_VEA_202A_DEGF.HIGH   85
ops@operator0:~ 0$ caput H0:FMC-MY_VEA_202B_DEGF.HIGH 85
Old : H0:FMC-MY_VEA_202B_DEGF.HIGH   75
New : H0:FMC-MY_VEA_202B_DEGF.HIGH   85
ops@operator0:~ 0$ caput H0:FMC-MY_VEA_202C_DEGF.HIGH 85
Old : H0:FMC-MY_VEA_202C_DEGF.HIGH   75
New : H0:FMC-MY_VEA_202C_DEGF.HIGH   85
ops@operator0:~ 0$ caput H0:FMC-MY_VEA_202D_DEGF.HIGH 85
Old : H0:FMC-MY_VEA_202D_DEGF.HIGH   75
New : H0:FMC-MY_VEA_202D_DEGF.HIGH   85

ops@operator0:~ 0$ caput H0:FMC-MX_VEA_202A_DEGF.HIGH 85
Old : H0:FMC-MX_VEA_202A_DEGF.HIGH   75
New : H0:FMC-MX_VEA_202A_DEGF.HIGH   85
ops@operator0:~ 0$ caput H0:FMC-MX_VEA_202B_DEGF.HIGH 85
Old : H0:FMC-MX_VEA_202B_DEGF.HIGH   75
New : H0:FMC-MX_VEA_202B_DEGF.HIGH   85
ops@operator0:~ 0$ caput H0:FMC-MX_VEA_202C_DEGF.HIGH 85
Old : H0:FMC-MX_VEA_202C_DEGF.HIGH   75
New : H0:FMC-MX_VEA_202C_DEGF.HIGH   85
ops@operator0:~ 0$ caput H0:FMC-MX_VEA_202D_DEGF.HIGH 85
Old : H0:FMC-MX_VEA_202D_DEGF.HIGH   75
New : H0:FMC-MX_VEA_202D_DEGF.HIGH   85

Light pipe installed for IOT2L's Mode Cleaner Transmitted path (and no blood was spilled---be sure to wear gloves when handling this ducting!).

Added stdenv.py to /ligo/cdscfg and stddir.py to /ligo/cdscfg/lho, at the request of Hugo.

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot requested from 5 PM May 13 to 5 PM May 14. Also attached are plots of the modes to show when they were running/acquiring data.

Dave B., Patrick T.

This work falls under permit number 3887.

This morning I installed new EPICS IOC code for the weather stations in /ligo/apps/linux-x86_64/epics-3.14.12.2_long_sc. The module code is davis_weather_monitor_ii-1.0.0 and the IOC code is weather_davis_weather_monitor_ii-1.0.0. The targets are in /ligo/lho/h0/target. The IOCs are running in screen on h0epics2.

This was done primarily to change the channel names to reflect the aLIGO PEM standard in T1200221-v5.
I also hard coded the alarm severities for the wind speeds in the database files. The wind speed alarm levels are set by hand and stored in the autoBurt.req files.
The macro substituted database files are now generated from a template and substitutions files when the IOC is compiled.
An iocBoot directory named ioch0_weather_cs was created and the target named h0weatherms was changed to h0weathercs.

Dave renamed the minute trend files to reflect the channel name changes. his alog entry
New medm screens were linked to in the site map that incorporated the channel name changes.
The autoBurt.req files were updated.

15 days of pumping is shown in the attached plot.

Several annuli remain to be pumped down.

HAM1, HAM2 - since HAM 1 is vented this annulus system(HAM1/HAM2) cannot be evacuated. Provided there are no big leaks this should be ok.

HAM 4 septum - liikewise HAM4 is vented so the septum annulus cannot be evacuated. Same comment as above - ok but not optimum.

BSC1, 2, 3 not yet evacuated.

Ear Bonding of ETM08 was aborted after finding precipitates inside Sodium Silicate Solution bottles, I contacted manufacturer and was told items had expired.  Norna was notified and bonding was suspended, new solution is on its way to LHO, bonding will resume next week.