I believe I have found a relevant bug report and a work around for various issues using the 'Terminator' terminal emulator program, including:

1. New terminals were placed behind existing terminals.
2. Opening a new terminal on a workspace that did not already have a terminal open on it would move an already existing terminal from another workspace to the workspace that the new terminal was opened on.

The bug report is here: https://bugs.launchpad.net/terminator/+bug/1508531

The work around is mentioned in one of the comments. Edit your ~/.config/terminator/config file and add 'dbus=False' under [global_config]. For example:

[global_config]
	dbus=False
[keybindings]
[profiles]
  [[default]]
    scrollback_infinite = True
[layouts]
  [[default]]
    [[[child1]]]
      type = Terminal
      parent = window0
    [[[window0]]]
      type = Window
      parent = ""
[plugins]


This seems to have resolved the issues mentioned above for me.

The pressure at PT-124 (just past GV6 along y-arm in LVEA) is the lowest is has been in 10 years. We know of a small leak on GV6 stem flange joint on bonnet plate. I won't read too much into this though knowing many of these cold cathode gauges are originals from iLIGO and out of calibration.

We measured test mass L2P to L3P and L3P to L3P transfer functions with high resolution (0.01 Hz bandwidth). For the convenience of modeling, we also fitted the measurements in zpk forms.

The measurement results and the fitted tfs are attached as figures. The zpk representation of the p2p tfs are attached as text files. Here we have scaled the DC level of each tf so that its magnitude should be in [rad / Nm]. We also used this information to update the L3P/L2P filter (i.e. FM2) in ASC-PRC_D/CHARD_P.

To generate a plant modified by the Sidles-Sigg radiation pressure torque, we can use the simple formula

       Plant_n (P_arm) = Plant_n (0W) / [1 + R(P_arm) * Plant_L3 (0W)]

where:

       Plant_n (P_arm) is the Sidles-Sigg modified SUS TF (P or Y) from stage n (L2 or L3) to L3 evaluated at (P_arm) W of circulating power in [rad/Nm]

       Plant_L3 (0W) is the L3 stage A2A TF at 0 W (i.e. free pendulum)

       R(P_arm) = -2 * P_arm/c * dy_dth * Plant_L3 (0W), with dy_dth = -4.5e4 [m/rad] for the hard mode, and +2.1e3 [m/rad] for the soft mode for aLIGO geometry.

NEGs 1, 2 and 3 were conditioned today, before the operation started all NEGs were valved out.  All NEGs will be valved in after they reach room temperature.

Work done under WP7965

GV 1,2,18 were opened (slowly). EY and vertex turbos are spinning down (stations are still energized for magnetic bearing). EY air compressors are OFF.

Nutsinee, Haocun

The OPO NLG and theshold was re-measured after chamber closed, and it is still around 17mW. (89% mode matching)

Measurements plotted attached.

   Vacuum pressure and temperature checks were good for the CS and both end station vacuum pumps. I added a bit more vacuum pressure the the CS. The end station pumps required no changes. 

   Closing FAMIS task #7846. 

Peter K. , Jeff B. 
WP #7953

   This morning Peter and Jeff shutdown the PSL and chillers to repair a leak in the throttling valve installed on the back of the crystal chiller. Both the crystal chiller filters were replaced. After restarting the chillers, Peter restarted the laser with no apparent problems. 

   After changing the filters there was a slight drop in the return pressure from the manifold in the PSL enclosure. The flows to the 70W, FE, and shutter went up slightly. Both of these reactions were expected. 

   After restarting the diode chiller the F3 error condition, from last week, has cleared. Per TermoTek the F3 error condition can be caused by reduced, restricted, or hot air flow over the condenser block. The internals of the chiller and the exhaust air shroud were both clear of blockages or obstruction. Temperatures from withing the chiller housing are in the upper 60sf and in the mid to upper 70sf inside the exhaust air shroud.

   Will continue to monitor throughout the day and watch for the F3 error's return.      

This morning around 9-9:15 I valved in the annulus pump carts on HAM 1,2,5,6. While doing so, I accidentally stepped on the HAM2 north SEI cross beam. Sorry, Hugh!

Dan Brown, TVo

We played around with the differential lensing (~+/- 40 udiopters in diff) and looking at the AS port with the OSA and the OMC mode scanning  to better balance the 9MHz sidebands, but unfortunately DRMI lost lock during our thermal transient and it was very difficult to recover even after re-aligning the corner optics, so we decided to move the CO2 settings back to the beginning of the day. 

Then we were able to do a SQZ single bounce off both ITMs and found that they were mode matched to around 99% on both optics.  Even though the sideband imbalance might not be great, the DRMI locks more readily with these settings (see below), and the SQZer seems to like this pre-loading state.  There may be a possibility that the IFO requires a different substrate lens than the squeezer in order to mode match well, this is still under investigation.  It's not clear to me how sensitive the squeezer is to the ITM substrate lensing, given an opportunity, we should try to constrain this better by measuring the response of the 02 peak in the OMC scans as we're changing the CO2 power.  We can also try to get the sideband imbalance better at the AS port and then re-measure the squeezer.

RH_X: 1.12 W (total)

CO2_X: 1.06 W

RH_Y: 5.24 W (total)

CO2Y: 1.78 Watts

IP11 valved in, plus two NEGs. Total pressure is 5.1e-8 Torr. Pre and post vent RGA scans attached.

Pre-vent scan is open to beam tube and IP11 is valved out (both NEGs valved in)

Post-vent scan represents volume being pumped by IP11 + NEG4 + NexTorr HV NEG.

Valved in last IP in vertex this morning (IP2) - all four IPs valved in plus three NEGs. Total pressure now 3.5e-8 Torr. Water partial pressure on RGA reading 1e-7 A (same as pre-vent with GV 1,2 closed).

Before opening GV 1,2, we will shut down turbo.

Four pump carts are still pumping on HAM 1,2,5,6 annulus volumes. Turbos are pumping on HAM 1,6 chambers. We typically turn their IPs on at 5e-7 Torr.

Yesterday morning we encountered another instance where the squeezer laser has gone multi mode, similar to alog 45055. It does look like the diode current was turned to the max by an unknown person. Not sure, if we need to install the spare, but this laser seems particular susceptible to multi mode operation. Please avoid changing the diode current, and if you do, please log.

I use 200W power meter to measure powers in the IO path on the PSL.  Adjusting for the changes in PMC Trans , the measurements are:

Attached: BEAM SCAN of beam reflected beam from IO_AB_W1, color changed on 2nd and 4th image

Haocun, Nutsinee, Sheila, TVo, Dan Brown

After some failed attempts (45474) at doing OMC scans of the squeezer seed single bounce off of ITMX we finally managed to see something today with increased seed power. In summary we are ~99% mode matched on single bounce from ITMX and ITMY. The SNR for the OMC scan was reasonable enough that we could see the astigmatism present in the beam. ITMY and SRM single bounce have a similar astigmatism, however ITMX single bounce doesn't look astigmatic.

Details

First we realigned ZM1/ZM2, going back to the weekends alignments we manage to find a good position that wasn't completely railing ZM2. We then used the new ZM1/ZM2 WF centering and guardian scripts from Haocun to offload to the ZM1/ZM2 sliders. This alignment seems to work well for getting the seed onto SQZT6 camera and the AS A/B, OMC QPD A/B. In this setting ZM1/ZM2 are still nearly saturating so we need to offload these at some point.

Aligning the seed to IFO beam was done with the same procedure outlined in 45375. With the AS air camera with a very long exposure we could see multiple beams from ITMY, ITMX, and SRM. Aligning SRX we saw good fringes on AS A/B. With SRM only we get around ~50 counts, with ITMX/Y ~2 counts on AS A/B.

We then did OMC scans for single bounce off of SRM, ITMX, and ITMY. We couldn't switch on the alignment loops for ITMX/Y single bounce so the first order peaks are still quite high. SRM single bounce we did switch them on but there appears to be an offset. Overall the ITM scans have very small second order peaks, giving ~1-2% mismatch comparing just the TEM20/02 to TEM00. The SRM single bounce is still showing the previous ~8% mismatch in horizontal and ~3% in vertical.

On the astigmatism front SRM single bounce still has the same features we saw previously. The ITMY second order peaks show an astigmatism is present, which is similar to the SRM result. Interestingly the ITMX bounce doesn't show any noticeable astigmatism. After watching the ITMY second order peaks for some time it became apparent that astigmatism was changing, most likely due to alignment drifting as no loops were on. So we are hoping that we can fix this with some more careful aligning soon.

The TCS was in a 50W preloaded state today. TVo is writing a log post about this.

Valved in pumps in this order:

1. NEG3
2. NEG2
3. NEG1
4. IP3 (no baffle)
5. IP4 (no baffle)
6. IP1 (w/baffle)

Left IP2 valved out as it cleans up from being up-to-air. It is currently running at 5kV.

Turbo is currently still valved in.