Attached are plots of dust counts > .5 microns in particles per cubic foot.

In order to complete the individual data set for H1 SUS PR2's phase 2B testing, I attach the amplitude spectral densities of all stages of OSEMs. Tough to determine anything from these plots:
 - there's so many dang plots,
 - one is only comparing damping ON vs OFF, so you're only looking for "do the damping loops
       - Damp the resonances
       - Add any unexpected additional noise at any stage"
but given those limited criteria, the answer is "looks fine..."

Stay tuned for comparison with other spectra and a more concrete/final answer.

• Prep work for installing PR2 by HAM3
• Linoleum installation at EX, expected to continue through this week
• Fire alarm drill
• Elli, Jax, Alberto and Bram working at EY at different times of the day, working on one arm test
• Ken working on electrical at EX

It turns out that the Ring Heater itself can be used to measure it's temperature. The resistivity changes with temperature. We see the voltage change over the first hour when the heater is turned on: - this is due to an increase in temperature of the ring heater wire and a subsequent change in the resistivity of the nichrome winding.

I've estimated the temperature of the ring heaters over time using a nominal value of 0.00017 K^-1 for nichrome and the measured RH voltage from last week's test. You can see the results in the attached plot.

T0 = 1029555836 for Segment 1

T0 = 1029555847 for Segment 2

Voltage signals = H2:TCS-ETMY_RING_HTR_SEG1_V_MON_OUTPUT, H2:TCS-ETMY_RING_HTR_SEG2_V_MON_OUTPUT

Current signals = H2:TCS-ETMY_RING_HTR_SEG1_I_MON_OUTPUT, H2:TCS-ETMY_RING_HTR_SEG2_I_MON_OUTPUT

35W beam

We had trouble locking the FSS, and left it unlocked for several days. This was tracked down to the cable going to the FAST actuator and was replaced yesterday, and it's held lock since then, so it looks fixed. This is the reason for the drop in the crystal temperature.

CoreyG HughR

We had done some large horizontal moves of the ISI per IAS (Initial Alignment) on Aug 1.  So after that we wanted to check the elevation.  It was still pretty close: 0.9mm low at worse with a range of 0.4mm level.  The vertical was tweaked to desired elevation +-0.1mm: -252.9(LIGO Global--E1000403)+12.5(Global to local--T1100187)=-240.4mm.

To Do list for SEI at HAM2: Respond to IAS with HEPI moves.  Iterate Horizontal/Vertical adjustments.  When good, attach HEPI Actuators, recheck with IAS.
Meanwhile--fine tune ISI lock/unlock balance.  Test ISI in prep for SUS payload.  Unload dummy payload when testing complete.

General:
Last week, the ISI, SUS and HEPI models-screens were updated to receive the last features and to replace the EPICS connection between the SUS and SEI watchdogs by the reflective memory (BSC6). The dolphin connection (SUS-SEI) will be added on BSC8 next week. The safe snap shots were also updated.

Ramping functions:
Both isolation filters of the ISIs and HEPIs can now be ramped using a function launched from MEDM. A restart procedure is currently being written. The DCC # is E1200762.

ISI Control:
I have changed the compensation filters of the output filter bank of ISI-BSC6 and ISI-BSC8. The cut-off frequency of the compensation filters was lowered 2 weeks ago (losing 6 degrees of phase at 30Hz). By the time, the watchdogs were tripping when engaging the boost filters. The “Turn on” option of the boost filters was changed from “zero crossing” to “ramp” (10s). The current filters are the initial ones.

I have introduced the T240 in the stage 1 blend of the 2 ISIs. The isolation provided by stage 1 using the T240 in the super sensor is higher (factor 5-6 @ 2Hz) than with L4Cs in the blend. During a quiet period, several configurations were tested. I have attached some results of few measurements on ISI-BSC8:

The first plot ITMY_T240_Y_2012_08_14_aLOG.pdf shows the non calibrated ASD of the stage 1 velocity (measured by the T240) in the Y direction with the different configurations:
- Damping only
- L4C X-Y-Z blend at 250mHz; L4C RX-RY-RZ blend at 750mHz; No Isolation on stage 2
- T240 X-Y-Z blend at 250mHz; L4C RX-RY-RZ blend at 750mHz; No Isolation on stage 2
- T240 X-Y-Z blend at 100mHz; L4C RX-RY-RZ blend at 750mHz; No Isolation on stage 2

The second plot ITMY_GS13_Y_2012_08_14_aLOG.pdf shows the non calibrated ASD of the stage 2 velocity (measured by the GS13) in the Y direction with the different configuration:
- Damping only
- L4C X-Y-Z blend at 250mHz; L4C RX-RY-RZ blend at 750mHz; No Isolation on stage 2
- T240 X-Y-Z blend at 250mHz; L4C RX-RY-RZ blend at 750mHz; No Isolation on stage 2
- T240 X-Y-Z blend at 100mHz; L4C RX-RY-RZ blend at 750mHz; No Isolation on stage 2
- T240 X-Y-Z blend at 100mHz; L4C RX-RY-RZ blend at 750mHz; Isolation on stage 2 – 750mHz blend
- T240 X-Y-Z blend at 100mHz; L4C RX-RY-RZ blend at 750mHz; Isolation on stage 2 – 250mHz blend

Blend switcher for the ISI:
The blend switcher allows changing blend frequency and type (CPS-L4C blend or CPS-T240-L4C blend) on the fly. It's working well. However, the isolation filters still have to be ramped up with the CPS-'L4C in the blend since the T240s saturate in the ramping process due to the small initial DC offsets (with the reference position) of the platform.

HEPI:
The blend and isolation filters controlling the pringle modes were reintroduced. The transfer functions used for sensor correction are linked below:
- H2_HPI_ETMY_H2_HPI_ETMY_TF_STS2_To_L4C_2012_07_03_044933.fig
- H2_HPI_ETMY_H2_HPI_ETMY_TF_STS2_To_L4C_2012_07_03_044933.pdf

(Bram, Alberto, Daniel)

This morning we were investigating the odd PLL oscillations that prevented us from increasing the servo gain. We found a very narrow resonance around 287.56kHz with a Q>100. We saw this resonance before, but it seemed to have had a much lower Q. It is unclear why this resonance has become so much more pronounced in the past few days. Our 100kHz low pass filter was designed to take care of this, but is obviously not sufficient to suppress a high Q resonance. Reducing the ugf to 6.5kHz avoids the instability, but will require that the cavity locking servo runs at a lower ugf too.

We then successfully locked the cavity. Looking at the I and Q signals it seemed that the RF phase was poorly adjusted. We first switched the delay line phase shifter to external, so we can use the medm screen to adjust the phase. Secondly, we minimized the Q signal by going from 135º (255 steps) to 85º (160 steps). We left the delay line in external mode. Meaning, it is important to restore the EPICS settings after a reboot.

While we were out there we also fixed the missing RF level readbacks from the second wavefront sensor demodulator board. They were connected to the wrong connector of the ASC demodulator concentrator.

The DAMP ON PR2 transfer function measurements were taken yesterday afternoon and this morning. Data has been exported to .txt files and the DTT .xml templates saved.

DTT .xml files and exported .txt files are saved and committed to the SUS SVN locally under:
'/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/PR2/SAGM1/Data/'

DTT .xml file names used:
2012-08-14_1810_H1SUSPR2_M1_WhiteNoise_L_0p1to50Hz.xml
2012-08-14_1810_H1SUSPR2_M1_WhiteNoise_T_0p1to50Hz.xml
2012-08-14_1810_H1SUSPR2_M1_WhiteNoise_V_0p1to50Hz.xml
2012-08-15_1438_H1SUSPR2_M1_WhiteNoise_R_0p1to50Hz.xml
2012-08-15_1438_H1SUSPR2_M1_WhiteNoise_P_0p1to50Hz.xml
2012-08-14_1810_H1SUSPR2_M1_WhiteNoise_Y_0p1to50Hz.xml

Exported .txt file names used:
2012-08-15_1438_H1SUSPR2_M1_WhiteNoise_L_0p1to50Hz.txt
2012-08-15_1438_H1SUSPR2_M1_WhiteNoise_T_0p1to50Hz.txt
2012-08-15_1438_H1SUSPR2_M1_WhiteNoise_V_0p1to50Hz.txt
2012-08-15_1438_H1SUSPR2_M1_WhiteNoise_R_0p1to50Hz.txt
2012-08-15_1438_H1SUSPR2_M1_WhiteNoise_P_0p1to50Hz.txt
2012-08-15_1438_H1SUSPR2_M1_WhiteNoise_Y_0p1to50Hz.txt

PDFs of plots:
'/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/PR2/SAGM1/Results/'

Saved as:
2012-08-15_1438_H1SUSPR2_M1_*_TF*.pdf

Data committed.

I am running these TFs - please do not touch the PR2.  It should only take me an hour, I'll alog when I am done.

The latest H1 SUS PR2 transfer function measurements were taken on the M1 stage this afternoon. Data has been exported to .txt files and the DTT .xml templates saved.  Plots of the data with the model trace are attached.  Plots with previous measurements to follow.

DTT .xml files and exported .txt files are saved and committed to the SUS SVN locally under:
'/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/PR2/SAGM1/Data/'

DTT .xml file names used:
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_L_0p1to50Hz.xml
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_T_0p1to50Hz.xml
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_V_0p1to50Hz.xml
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_R_0p1to50Hz.xml
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_P_0p1to50Hz.xml
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_Y_0p1to50Hz.xml

Exported .txt file names used:
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_L_0p1to50Hz.txt
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_T_0p1to50Hz.txt
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_V_0p1to50Hz.txt
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_R_0p1to50Hz.txt
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_P_0p1to50Hz.txt
2012-08-14_1720_H1SUSPR2_M1_WhiteNoise_Y_0p1to50Hz.txt

PDFs of plots:
'/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/PR2/SAGM1/Results/'

Saved as:
2012-08-14_1720_H1SUSPR2_M1_*_TF*.pdf

Attached are plots of dust counts > .5 microns in particles per cubic foot. Also attached is a plot of the mode of the dust monitor at end X (H0:PEM-EX_DST1_MODE). This shows approximately when the values read for that dust monitor went invalid.

Finalised the name changes in the h2iscey model, and commited the model to svn. The following filter module name changes are made

1. _CM_PDH -> _REFL
2. _CM_PHASE -> _FIBR
3. _REFL_PWR_MON -> _REFL_B_PWR
4. _IR_PWR_MON -> _LASER_IR_PWR
5. _GR_PWR_MON -> _LASER_GR_PWR
6. _BB_PWR_MON -> _FIBR_A_PWR
7. _PDH_DC -> _REFL_A_PWR

The model compiled and was installed.

Update MEDM Screens

I modified the following adl files

isc/h2/medm/OAT.adl

This was done with sed string replacement:

sed -i -e 's/_CM_PDH/_REFL/' -e 's/_CM_PHASE/_FIBR/' -e 's/_REFL_PWR_MON/_REFL_B_PWR/' -e 's/_IR_PWR_MON/_LASER_IR_PWR/' -e 's/_GR_PWR_MON/_LASER_GR_PWR/' -e 's/_BB_PWR_MON/_FIBR_A_PWR/' -e 's/_PDH_DC/_REFL_A_PWR/' OAT.adl

I then hand edited the 'column buttons' to reflect the filter names.

Update filter files

I modified the following file

/opt/rtcds/lho/h2/chans/H2ISCEY.txt

first I made a copy, cp H2ISCEY.txt H2ISCEY.txt.20120814bak, then did the sed thing again,

sed -i -e 's/_CM_PDH/_REFL/' -e 's/_CM_PHASE/_FIBR/' -e 's/_REFL_PWR_MON/_REFL_B_PWR/' -e 's/_IR_PWR_MON/_LASER_IR_PWR/' -e 's/_GR_PWR_MON/_LASER_GR_PWR/' -e 's/_BB_PWR_MON/_FIBR_A_PWR/' -e 's/_PDH_DC/_REFL_A_PWR/' H2ISCEY.txt

Restore EPICS values

Used a snap file from 5am this morning and did a sed thing, and burt restored the system.

cp /ligo/cds/lho/h2/burt/2012/08/13/05:00/h2isceyepics.snap /ligo/home/bram.slagmolen/work/h2isceyepics_20120814_05am.snap

sed -i -e 's/_CM_PDH/_REFL/' -e 's/_CM_PHASE/_FIBR/' -e 's/_REFL_PWR_MON/_REFL_B_PWR/' -e 's/_IR_PWR_MON/_LASER_IR_PWR/' -e 's/_GR_PWR_MON/_LASER_GR_PWR/' -e 's/_BB_PWR_MON/_FIBR_A_PWR/' -e 's/_PDH_DC/_REFL_A_PWR/' h2isceyepics_20120814_05am.snap

burtwb -f h2isceyepics_20120814_05am.snap

Analyses channels

To monitor if the arm cavity is locked the channel name has changed (for the last time!!), the new channel is,

H2:ALS-Y_REFL_B_PWR_OUT - it has a 100 Hz low-pass filter.

Values between 4000 and 9000 represents a locked cavity, with a higher value better alignments. The units are counts, and are arbitrary as we apply an offset to the input to make it zero when the cavity is off resonance, and then we have a gain of -1. So, when we bring the cavity on resonance the output goes up.

The cavity lenght error point is still,

H2:ALS-Y_ARM_LONG_IN1 - and is in units of [nm].

All fixed now:
1. This morning we noticed that the slow voltage monitors indicated a failure. This was tracked to the +24V in EY being only at +22V.
2. Looking at the alarmed OK readbacks of the common mode boards, we noticed that the error flag indicated all was fine. This was due to a missing call to the error handler.
3. The DC power readbacks now have offset adjustment, transimpedance gain and optical response settings. However, due to a programming error, the save/restore of these settings was not working.
4. The RF power monitors of the demod and PFD boards always indicated relatively high LO readings. We tracked this to an error in the equation which is used to translate volts into dBm. 
5. While looking at the LO input to the ALS demod board we noticed that the RF level was marginal at ~7dBm. The additional loss is due to the delay line phase shifter feeding the LO. However, there was a 2dB attenuator attached to the input of the delay line. Removing it gave us a nominal 9-10dBm.
6. Last Thursday we noticed that we don't have a timing system readback from the 24MHz RF source in EY. The first problem was a fiber module with the wrong model number in the fanout. 
7. The second problem was that the RF source never synchronized to GPS. After trying everything we finally reprogrammed the FPGA PROM which resolved the issue. Not sure how this unit passed testing, but this almost certainly affects our cavity length measurement which needs to be repeated.

Jeff and myself: reverted h1susmc2 and h1suspr2 models back to early last week before the latest L1 models were tried.

The h1sush34 IOP WATCHDOG was disabled. This means that the DACKILL on h1sush34 cannot be triggered by bad MC2 or PR2 OSEM signals. This was interfering with commissioning of these optics while MC2 is in chamber and PR2 is chamber side. I will keep the workpermit for this variance open until the WATCHDOG is restored.

I tried to take the L1 latest l1susim model and convert it to H1. When I tried to run it spectacular things happened:

• all H1 front end data was marked as bad
• restarting daq streaming caused DAQ to crash
• all models using Dolphin stopped running (my bad, new IM uses Dolphin)

The new l1susim required a C-code file ATAN.c which I brought up from LLO.

I ended up reverting to my original h1susim model (itself a L1 copy done in June) and restarted all SUS and SEI models to clear the errors. I'll work with David Feldbaum on the new model at a time when losing PR2, MC2 and PSL data is not so disruptive.

MarkD EdP ScottL JimW HughR

No real issues to report on this now our third (fifth or sixth if you count eLIGO + extract) ISI installation.  We did use the crane to help roll the A-Frames w/I-Beams attached into the chamber.  The balancing measurements & moves paid off as we cleared HEPI by a comfortable 1/2".  All the tooling/fixtures are removed.
We likely won't do much more with this installation except to plug cables into feedthrus and dress said cables.  We will not payload table which means the Lockers remain unlocked but the suspended stage is clamped in position with the Shipping Braces.  The Shipping Braces prevent the installation of 4 of the 15 bolts so the ISI is not completely bolted to the Support Tubes.  This will be done when Installation decides this needs to be completed.

A few photo attached for your pleasure.

H2 Maintenance:

Jamie, Bram and myself installed a new h2iscey model (changed internal filter names in ALS_END). This required a H2 DAQ restart.

I added the second TCS L0 ADC on the CDS OVERVIEW MEDM screen.

HAM5ISI Installation

The main activity of the day was the installation of the HAM5-ISI.  Hugh & crew started rolling this assembly into HAM5 at 10:30 & they were mainly done before lunch.  They were completely done by 2pm-ish.

Other Activities

• All BSC8/BSC6 SEI Watchdogs tripped last night due to Russian earthquake
• Fire Dept on-site
• Dave addressed watchdog issue with the HAM3 optics (this was to allow Betsy to run measurements remotely)
• TCS CO2 Laser powered up in East Bay
• EX Dust Monitor went INVALID (notified Patrick)
• Thomas re-aligned the EY Optical Lever "x 2"           (FYI, a lizard now calls EY VEA home)
• HAM2 ISI positioning work (Hugh, Jim)

For the afternoon, Vincent requested quiet time so he could run SEI measurements.

Maitenance:

• CP8 filled
• Unifirst & King Soft Water on-site

The attached is the latest transfer function measurements taken on H1 SUS PR2 SAGM1 stage.  The data was taken 07-29-2012 and is plotted with the predicted model and a previous measurement from the metal build in the Staging Building.  The pdfs are committed to the SUS SVN under:
'~/sus/trunk/HSTS/Common/Data/allhstss_2012-07-29_*'

Data committed in:
'~/sus/trunk/HSTS/H1/PR2/SAGM1/Data/2012-07-29_H1SUSPR2_M1_WhiteNoise_*DoF*_0p1to50Hz.txt'

DTT templates used had the same name but with an "xml" extension.