1510 - 1525 hrs -> To and from Y-mid 

39 seconds for LN2 to appear at exhaust with LLCV bypass opened 1/2 turn.  

Next over-fill to be Friday

I found that the digital filter settings for the AC signals of PWR_EOM and PWR_IN (29876) were wrong. I set them back to the correct one, see the attached screemshot for the right settings. The SDF is updated accordingly.

In addition, when I went into the PSL enclosure in this morning, I re-aligned the beam on PWR_IN which is a PDA55 down below the periscope. The beam actually had some misalignment both in pitch and yaw. As I aligned the beam, the received power increased by 2-3%. I did not change the calibration of this PD in the digital system.

[Cheryl, JeffB, Jenne]

ITMY bounce damping phase was bad again.  In the end, the phase that we were using before 21Sept is once again correct.  I'm going to put this in the guardian, but we may want to start looking at if our beam spots are moving around in some way that is making this happen. 

See Stefan's alog 30140 for a summary of previous work on this.

J. Kissel

While attempting to verify the success of Fil's work with the ETMY UIM / L1 monitor signals yesterday (LHO aLOG 30231), I noticed that the NOISEMON channels were white on the 
/opt/rtcds/userapps/release/sus/common/medm/quad/SUS_CUST_QUAD_MONITOR_OVERVIEW.adl
After some detective work, I realized it was because of the upgrade of these NOISEMON and FASTIMON channels to full filter bank status (ECR E1600033, and LHO aLOG 25329). During that upgrade, we never took the time to update the MEDM screens. 

This is indeed true of most of the SUS (QUADs, BSFM, HLTS, HSTS, TMTS, and OMCS), since all NOISEMONs and FASTIMONs have been similarly upgraded.

As such, I've quickly fixed the bug in all of the following MEDM screens:
/opt/rtcds/userapps/release/sus/common/medm/quad/SUS_CUST_QUAD_MONITOR_OVERVIEW.adl
/opt/rtcds/userapps/release/sus/common/medm/bsfm/SUS_CUST_BSFM_MONITOR_OVERVIEW.adl
/opt/rtcds/userapps/release/sus/common/medm/hxts/SUS_CUST_HXTS_MONITOR_OVERVIEW.adl
/opt/rtcds/userapps/release/sus/common/medm/tmts/SUS_CUST_TMTS_MONITOR_OVERVIEW.adl
/opt/rtcds/userapps/release/sus/common/medm/omcs/SUS_CUST_OMCS_MONITOR_OVERVIEW.adl

and committed them to the svn repo. LLO need only svn up these directories to receive the bug fix.

Keita Robert Daniel

We misaligned MC2 and made a jitter measurement using the DC readouts of the two wavefront sensors in reflection of MC1. The PSL power was close to 2 W. The top panel of the first attached plot shows the jitter and displacement spectra in units of divergence angle and beam size, respectively. The bottom panel shows the spectra measured by the QPDs of the PSL diagnostics breadboard in arbitrary units. The calibration for these QPDs is not clear at the moment.

The second plot shows coherence spectra between the QPDs of the PSL diagnostics breadboard and the wavefront sensors.

Some observations:

• The jitter below 100 Hz seems to come mostly from the PSL HPO—even after the attenuation provided by the PMC. This rise towards lower frequencies was not present in O1.
• The slope of the uncalibrated PSL QPD spectra differs above 100 Hz from the pointing noise reported by the automated procedure of the diagnostics breadboard. The uncalibrated QPD spectra are a lot flatter in this frequency region. The flatter spectra do a better job explaining the coherence of the 240 and 450 Hz peaks with the wavefront sensor.
• Since we see the coherence of the HPO peaks with the wavefront sensors, its difficult to see that the 1Q spectra (which doesn't show the peaks) can be five times higher than the 2Q spectra.
• The calibration of the PSL QPD spectra can be estimated from the coherence with the wavefront sensor spectrum. For 2Q the calibration factor should be around 60 x 10^–5, and maybe 10 x 10^–5 for 1Q. The attenuation factor of the PMC is around 60.

MC2 misalign was putting +300 counts on MC2 yaw through the test channel offset.  Today when JeffB set the IMC to offline, the IMC was still flashihing.  I put an offset of -1000 into the alignment slider, which is -2232 counts after the gain, which did misalign MC2 enough to stop all IMC flashing.

The total offset was +300-2232 = -1932.   I tested the offset before relocking the IMC, and -1000 stops all flashing, -800 sowed signs of some small increase in light on MC2 Trans, and -600 clearly shows IMC flashes, so I set the offset at -1000.

I ran this by JeffK and updated the TEST offset used to misalign MC2 to -1000, and updated SDF.

I have increased the heater output in the LVEA to 7.5ma, up from 6ma. 
I also increased the heater output at EY by 1ma to 10ma.

WP 6213
FRS 6114

Late entry for work done yesterday 10/4/2016.

FRS 6114 reports offset of 4000 counts in some of the fast I monitor channels. The AA chassis associated with these channels were powered off, no change in offset. Here is a list of the things we did.

1. The ribbon cables between the ADC card and the interface card were replaced on cards 1 and 2.
2. All ADC cards and interface cards were reseated.
3. IO SUSAUXEY was restarted, after ribbon cable swap and again after reseating the cards.

As of now, ADC1, ch19 still has an offset of ~4000 counts.

One thing to note, the adapter cards do not line up with the mounting hole screw. When the mounting screw is inserted, it lifts the back of the card up. This is something we have seen before. For now, I left the adapter cards without the mounting screw inserted.

J. Batc, F. Clara, R. McCarthy

SEI: Fixed the STS centering at End-Y; All OK
SUS: All OK
CDS: Fixed noise source at End-Y
PSL: Swapped Diode Chiller control panel; PSL has been running for 24 hours without a trip.
     Working on understanding the Crystal Chiller/Flow Sensor trips.
TCS: No report
VAC: All OK
FMC: All OK, No safety meeting today

Wednesday 15:00: Operators Guardian training session
Thursday 15:00: LIGO India Logistics kickoff meeting    	

TCS-X: No additional water required. Water level 29.0, 3.7 gpm, 20.1 deg. C.

TCS-Y: Found water level at 5.7, added 300 mL water, raised water level to 10.2, 4.0 gpm, 21.0 deg. C.

Before injections, I adjusted H1:SUS=SRM_M1_OPTICALIGN_P_OFFSET to minimize the 280 Hz jitter peak. I chose this offset because, when I looked back at 8 recent good locks, the jitter peak height was most sensitive to adjustments of this offset. I did this between about 2:10 and 2:30 UTC. The sharp jitter peak / background ratio was indeed very sensitive. The peaks were at a minimum around -680. Then I got in about an hour of injections. The first attachment shows the manipulations and a band pass around the 280 Hz peak and the second shows the basis for using this channel: the results of alignment offset manipulations since Sept. 23 on this band.

The laser power is noticeably lower since the beginning of last week.  I increased the diode currents by
0.3A and adjusted the diode temperatures.

diode currents were 50.2A, now 50.5A
diode box 1: no change
diode box 2: reduced temperature from 23 to 21.5 degC
diode box 3: reduced temperature from 23 to 22.5 degC
diode box 4: no change

Laser power went from 158.2W to 166.3W as reported by the power monitor on the MEDM laser screen.

Tonight we paused after a lockloss to look at the refl beam.  With PR2+PR3 misalinged and PRM, I turned on the refl WFS centering servos.  

First I tried to move both PRM and offsets inthe centering servos to see if there was an alingment where there is more light on the LSC refl diode.  There seems to be the maximum power on the diode when we have no offsets in the centering loops and PRM has the same alingment as durring a high power lock according to the osems.  There is no evidence for clipping here. 

Then I had a look at the RFAM, both by looking at the digital readback of REFL 9I and using a spectrum analyzer ( I lost the data from the analyzer in a floppy disk mishap).  BY unplugging the 9MHz modulation to the PSL, I got a reference for the noise that is not due to RFAM (shot noise, ADC noise, 60 Hz harmonics).  Just looking at the level of noise in the attached screenshot, and Evan's coupling measurement (29893), you would estimate that this noise is at the level of a few time 10^-21 m/rt Hz in DARM.

I also got some data for OMC length noise measurements, but will post those tomorow. 

TITLE: 10/05 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Commissioning
INCOMING OPERATOR: None
SHIFT SUMMARY:  PSL came online just as my shift was starting.  After a straightforward initial alignment, we made it to NLN with little issue (see aLog 30222 for the little issue).  Robert did PEM injections for the first half of the shift, then Sheila has been commissioning for the remainder.
LOG:

23:00-3:00 Robert to LVEA several times for injections

6:10 Filled TCSY chiller

6:40 Sheila to LVEA

6:57 Sheila out

The laser is gingerly up for now.  Even though it is running, it is not really fixed.
Another shake down involving the flow sensors will take place on Thursday morning.

Will need five days to run pumps in VEA, so likely will sit until O2a - O2b break?

While Daniel, Sheila and I were looking at some jitter signals, we noticed that the SUM channels that are used to normalize the DC QPDs do not have any lowpassing!!  The transmon QPDs already had these more modern parts, but they were never back-propagated to the ASC model. 

Also, while the trans QPDs had the right model parts, there aren't actually any lowpasses installed in the filter banks.  We'll want to give ourselves ~1Hz cutoffs to eliminate all the high frequency junk, while still allowing the normalization to use the overall power on the QPDs.

I have now done replaced the old QPD parts with the new ones in the ASC model, and successfully compiled the ASC model.  It has not yet been installed / restarted.

I'm almost done making the new screens, and should be done with another ~30 min of work tomorrow.

To be consistent with the transmon QPDs, rather than saving the _SUM channels, we will now be saving the _NSUM_OUT channels.  The _SUM channels will get the lowpasses, since they are used for the actual normalization of the pitch and yaw signals, so they're not what we'll want to look at for spectra and other things.  The _NSUM channels have the ability to be normalized with the PSL input power, but we are not using that capability (and haven't been with the transmon QPDs either), so really they're just the sum, with no lowpass.

The affected QPDs are:

REFL_A_DC, REFL_B_DC, AS_A_DC, AS_B_DC, POP_A, POP_B, AS_C, OMC_A, OMC_B, OMCR_A, OMCR_B, AS_D_DC(even though we don't use this last one).