Working at MY. Kyle and Gerardo are my phone buddies.

During CP4's bake-out, we would like to send cell phone alarms if the temperature's rate-of-change exceeds 1degC per hour. I'm testing a python script I wrote yesterday which accumulates data and reports the differences between the current value and those from various times in the past. During the testing phase both the code and its companion EPICS IOC are running on my workstation (zotws6).

I modified the dog clamps on 3 of the 4 PMC feet that hold the PMC to the PSL table.  The 4th foot attachment point is located between the ISS and the PMC, and will be addressed at a later date.

For 3 of the 4 feet:

• as found: I unscrewed a few of the dog clamps with a long straight ball driver
• now: all screws tightened with an angled allen key
• as found: 5 of 6 dog clamp bolts had only a couple threads into the PSL table
• now: swapped for longer bolts
• as found: 1" dog clamps were angled up toward the contact point with the PMC foot
• now: adjusted the screw to angle the dog clamp down toward the contact point
• additional hardware installed: added an up side down dog clamp that is in contact with the foot, positioned to prevent any lateral movement

- Cheryl, Matt, Ed

I wanted to note that in order to tighten a couple of the PMC dog clamps, I had to disconnect the cable to the accelerometer that's near the PMC.  The accelerometer appears to be very strongly attached to the PSL table top.  When I went to remove the cable, I found that it wasn't fully secured to the top of the accelerometer, and I don't know if that signal has been having noise issues, but wanted to log that.  The cable is now reconnected and secure.

State of the ISIs: HAM2-isolated-damped: HAM3-damped: HAM4-damped: HAM5-damped: HAM6-locked: ITMX-damped: ITMY-isolated-damped: BS-damped: ETMX-locked: ETMY-locked.

• crystal chiller, found 1/2 way between min and max, added 100ml
• diode chiller OK, no faults

Terry, Sheila, Nutsinee, Daniel

This afternoon there was a lot of work around HAM6, Terry got a beatnote for the FSS using our temporary laser, Daniel swapped in vac cables (480818), and we installed the new long green fiber that we received from MIT today.  

We are getting about 50% transmission from the fiber.  Before installing it Terry inspected both ends of the fiber using the fiber microscope.  We used only 2.7mW into the fiber. 

J. Oberling, E. Merilh, M. Heintze

A frustrating day with little progress.  We started this morning finishing up the setup for the beam caustic measurement.  We installed an iris to block the ASE from the FE, installed a pump light filter to block any 808nm pump light, and installed an 95% output coupler to dump most of the FE beam into a beam dump.  This done, we began the measurement.  It was immediately apparent that the 200mm lens installed in L15 was too much for the Wincam, so we swapped that with a 300mm lens.  We then noticed that we had a very nice LG01 mode instead of the TEM00 mode we expect.  This is very strange, as we would not be able to lock the PMC with the mode out of the FE being that bad, and we had the PMC lock yesterday.  We noticed the beam clipping on the bottom of PBS02 (which could be causing the mode issue), and upon relocking the PMC found that now only 13W was incident on it.  Something in the alignment clearly shifted.  Our first suspect was AMP_PBS01 not looking very secure in its mount, so we removed it, mounted it better and reinstalled it.  We then spent the rest of the day realigning AMP_PBS01 to the PMC.  At the end of this alignment we now have 25.7W incident on the PMC, with 3.6W reflected and 22.1W transmitted.  The beam is still slightly clipping on PBS02, so apparently the new pick-off has changed the launch angle out of the FE; since the beam still hits mirror M33, we will fix this by shaving a few mm off of a couple of spare mounts and re-mount WP02 and PBS02 to this new beam line.  The FE was left running with PMC locked over the weekend to see if our alignment shifts again; if so, then we have another issue to hunt down before proceeding with the beam caustic measurement.

Sheila Daniel

We couldn't see the thermistors after connecting the in-vac sqz cables. Investigating, we found that the signals can be found on cable 303 rather than 304 at the sqz satellite chassis; and the PZTs seem to show up on cable 304 rather than 303. The DCPDs show up as expected on 305. As a side note, we noticed that for DCPD2 the case is connected to the anode, where this is not true for DCPD1. The sqz satellite chassis seems to short the case to the cathode, so this looks like an unwanted short.

We traced the cables to the vacuum flange and found them to be connected correctly, indicating that they are swapped in the chamber. Taking a look inside, we couldn't figure out how relate the cable harness routing described in D1300122 with what is installed. We gave up and left the cables disconnected at the satellite chassis.

CP4 is baking at a rate of around 0.7C/hr. Flow is still 80% restricted at return duct. Kyle, Gerardo and I are splitting shifts to monitor pressure and temperatures remotely. Next week we'll start the regen GN2 heater. 

Temps are monitored here: https://lhocds.ligo-wa.caltech.edu/cr_screens/png/video0-1.png, and also at CP3's discharge TE202A channel (we are unofficially calling it GV11 air temp).

The heater is controlled by the reading of thermocouple installed at supply exit, which is the warmed spot, as expected.

J. Kissel, J. Warner

While in chamber to B&K the PCAL Periscope (see LHO aLOG 40814), I grabbed a few publicity photos of the backside of H1SUSETMY on Jim's phone for future talks that reference the AERM.

Enjoy!

J. Kissel, J. Warner

Jim and I hammered the H1 PCAL EY Periscope this morning after all planned modifications have been completed (as of LHO aLOG 40777). Excellent news -- all resonances below 400 Hz have been entirely squashed. Given these results, I would expect higher frequency resonances are equally squashed.

Nice work design and installation teams!

The attached images show the chosen accelerometer locations (different from LHO aLOG 40330 because both accelerometer mounting holes were used up by the baffle installation) and hit locations.

The .pdf attached shows four plots: 
- A recap of what we used to have at H1 and L1,
- A before vs. after comparison of the 12 O'Clock position accelerometer response to a 7 O'Clock strike
- A before vs. after comparison of the 3 O'Clock vs. 9 O'Clock position to 7 O'Clock strike (because of the cylindrical symmetry, we figured 9 and 3 were equivalent, as long as the radial position was the same-ish).
- A show of both 12 and 9 O'Clock responses to 7 O'Clock strike in the final configuration, showing there isn't an high-Q resonance left to be found!

Checked for ground loops at EY this afternoon. Found issues with three cables (SUS_1, SUS_16, and SUS_19). Coordiinated with SUS team and will investigate/repair on Monday.

TITLE: 03/02 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
LOG:

Jeff K. and Jim running B&K measurements of PCAL at end Y

16:27 UTC Corey to ISCT6 to fix door handle
16:39 UTC Sheila to optics lab to cover equipment in prep for facilities work
16:51 UTC Corey to optics lab to cover equipment in prep for facilities work
16:59 UTC Jeff K. and Jim back from end Y
17:09 UTC Jason and Ed to PSL enclosure
17:19 UTC Terry to ISCT6 to work on beam path
17:25 UTC Rick to end X to put lock and tag on PCAL laser in prep for vent
17:31 UTC Travis to end Y, in chamber work
17:49 UTC Chandra to mid Y
17:54 UTC Karen at mid Y
18:00 UTC Karen leaving mid Y to retrieve vacuum from corner station
18:17 UTC Karen back at mid Y
18:24 UTC Sheila and Corey out of optics lab
18:24 UTC Travis back from end Y
18:31 UTC Marc to LVEA for cosmic ray testing
18:31 UTC Nutsinee to ISCT6
18:50 UTC Matt H. to PSL
19:05 UTC Karen leaving mid Y
19:11 UTC Signed WP 7395. Sheila making model changes, no restarts
19:36 UTC Nutsinee back
19:38 UTC Tumbleweed thrashing near corner station
20:02 UTC Delivery from Apollo
20:02 UTC Jeff K. to optics lab
22:09 UTC Matt H., Ed and Jason out of PSL enclosure for lunch
20:10 UTC Jeff K. out of optics lab
20:55 UTC TJ and Travis to HAM6
21:08 UTC Marc and Elizabeth to LVEA to work on cosmic ray
21:15 UTC Sheila to LVEA to look for headsets
21:18 UTC Ed and Jason to PSL enclosure
21:23 UTC Sheila to end Y to look for headsets
21:23 UTC Matt H. to PSL enclosure
21:24 UTC TJ and Travis out of HAM6
21:32 UTC Marc and Elizabeth back
21:44 UTC Filiberto and Elizabeth to end Y for SUS ground loop checking, then pulling fiber from patch panel in VEA to fan room for access control system
21:48 UTC Sheila back
21:54 UTC Hugh and Mark to LVEA
21:57 UTC Sheila to HAM6 to install fibers
22:00 UTC Nutsinee to find Sheila in LVEA
22:10 UTC Travis moving equipment from end Y to end X
23:07 UTC Travis back
23:24 UTC Greg leading tour into CR
23:36 UTC Greg leading tour out of CR to overpass
00:10 UTC Cheryl to PSL enclosure, WP 7393
00:24 UTC Filiberto and Elizabeth back

J. Kissel

I've filled in the infrastructure for ZM1, which was mostly copying over filters from ZM2, and filling in the standard OSEM2EUL and EUL2OSEM matrices for an HTTS. I found, however, that the damping loops don't work. So, I took some driven transfer functions and spectra to see if I could identify the problem. Sadly, the dynamics -- especially the common mode actuator longitudinal TF -- looks pretty dicey. See attached screen shots.

Data templates live here:
/ligo/svncommon/SusSVN/sus/trunk/HTTS/H1/ZM1/SAGM1/Data
    2018-03-02_2225_H1SUSZM1_M1_WhiteNoise_L_0p01to50Hz.xml
    2018-03-02_2225_H1SUSZM1_M1_WhiteNoise_P_0p01to50Hz.xml
    2018-03-02_2225_H1SUSZM1_M1_WhiteNoise_Y_0p01to50Hz.xml