We replaced the AP1053 on LO Mon Channel 4.  The channel now reads back correctly.  See WP7349

Screenshot of HAM & BSC CPS spectra is attached.  The only chamber which is askew is the ETMY (BSC10) ISI table, but this chamber is currently locked for ETMY SUS work.

The AA chassis for the TCSX system was found to be damaged. TCSX medm had been reporting wrong values for LASER power supply voltage and current. There were two channels on the corresponding filter board that were found to have blown buffer chips. These were replaced and the voltage and current draw are being properly displayed, currently. Also, there had been an issue with the actual power supply. The factory defaults were reset and the voltage was reset back to 28VDC and it seems to be functioning properly at this time. It is uncertain how or if the two issues were related.

We hard closed GV-20 today for cleanroom move and will leave it closed for vent week of 26th. Valved in IP-12 temporarily.

Looks like CP4 is spewing some water. Pressure curve attached. We have dry N2 gas plumbed into the back end of turbo to prevent hydrolock in pumps.

Reminder that text alarm is set to 5e-5 Torr on PT-245B.

Attached (thumbnail is black box, but assure you it is a trend) is the last 24hrs of dust counts at EX. These are correlated with the man lift in the area (Bartlett investigated yesterday), and I just chatted with Mark D.

Mark mentioned charging it a little this morning & then operating the man lift. It was in the VEA, so the dust counts this morning can be attributed mostly to the charging. (It is a known situation that when we charge batteries for this large equipment that a large plume of dust is generated.)

Right now EX is in the very early stages of preparing for opening BSC9, and this implies we are in the "dirty work" stage. This work needs to be done, but we should ramp down on needing the dirty battery-charging. Note: When Mark was moving the man lift around and during this work the dust counts were in the green/much cleaner.

The current state at EX is Mark is done with the Manlift and he has turned ON the BSC9 cleanroom.  There will be some craning work later today.

Another NOTE: Mark mentioned the prefilters on top of the BSC9 clean room fans (they are rectangular 1/4" thick mesh pieces) basically disintegrated in his hands when handling them (he threw all of them in the trash). So, I'm sure this also caused some dust clouds.

TITLE: 02/15 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    Wind: 4mph Gusts, 2mph 5min avg
    Primary useism: 0.22 μm/s
    Secondary useism: 0.24 μm/s
QUICK SUMMARY:

• 15:30 Mark is at EX, and I'm assuming he is charging/moving the Man Lift because dust counts have made another big jump up.
  • [edit:  Dirty work is currently going on at EX to prep for cleaning & opening up BSC9.  On camera I see Mark moving around on the manlift & dust monitors are back in the green.]
• 16:00 MidY's CP4 work continues (Chandra)
• Low frequency seismic DMT still has issues (but all Control Room computers will be upgraded in the coming weeks, so hope to get this going after the upgrade.
• [edit:  Ken working at MY.]

Two screenshots attached show changes in dark offsets to WFS A and WFS B.  Old offset values and dataviewer on the left, new offsets and screens on the right.  Both WFS have an offset of 4.0 on the SUM.  Changes saved to SDF.

Cryopump #4 reservoir is empty and the pressure at CP4 started to rise as a result - currently at 9.4e-8 Torr, and tapering off. Kyle closed the main LN2 draw valve outside to ensure no LN2 was seeping past the LLCV. 

A second scroll pump is running and valved out at the bottom right angle valve on CP4, just in case the primary turbo scroll fails. Turbo has a fan for cooling.

GV 11 was completely stripped of all annulus piping today and more fiberglass insulation was removed from the GN2 lines (mid-y station needs a good cleaning). 

CP4 Dewar will get filled next Tuesday.

Another change order to bake enclosure design is being worked out. Still plan to start installation Tuesday, the 20th.

I set the dark offsets for IM4 Trans QPD.  Attached screenshot has the QPD segment old offsets on the far left.  Center screens show current offsets.  Dataviewer plots on the right show data from last Sunday night with a locked IMC with the EOM power reading 5W (left dataviewer plot), and today with no light (right dataviewer plot).  Using the lock Sunday night, with the sum = 88.7, I calculated a differences of 6% in the pitch signal with the old offsets vs without offsets (offsets set to zero), and looking a back a year to O2, the difference in the pitch signal with and without the old offsets was 0.2%, low as expected.  Changes saved in SDF.

J. Kissel

Taking the data from this afternoon's aLOG as my target frequencies (LHO aLOG 40534), I've tuned BRD S/Ns 014 and 018 to match the highest vertical (a.k.a bounce) and roll mode frequencies of the newly suspended H1 SUS ETMY. Results are attached and tabulated below:

    'Target [Hz]'    'BRD S/N'    'Mean Fit Freq. [Hz]'    '% Diff [%]'
    '9.734'          '014'        '9.792'                  '0.59'      
    ''               '018'        '9.76'                   '0.26'      
    ''               ''           ''                       ''          
    '13.843'         '014'        '13.811'                 '0.24'      
    ''               '018'        '13.876'                 '0.24'

The uncertainty in the frequency corresponds to the original binwidth of the measured vibrometer / QPD data, +/-15 mHz.

Setup for measurement is as described in the HAM ISI TMDs (see LHO aLOG 38741) using corroborating evidence from both the laser vibrometer and a primitive shadow sensor setup. To calculate the above "Mean Fit Frequency," I used a least square's minimization with a Lorentzian seed function,
    fit(f) = (1/Q)^2 ./((f - f0).^2 + (1/Q)^2) + C 
to fit both sensors' data to obtain the measured frequency within the noise, and then took the mean of the two sensors' results.
The mean frequencies are less than 1% different from the target frequency of H1 SUS ETMY, which means the tuning is within requirements of "match target frequency to better than +/-1%."

I've left the tuned valentines on Betsy and Travis' desk.

WP7350 FRS9824

I have put the cell phone alarms system under systemd control on cdslogin.

Porting the code which used to run in the foreground, report to STDOUT and use shell environment variables to run as a systemd daemon was not without difficulties.

I have tested the new system by killing the running process and verifying a new process was restarted by systemd.

Details in wiki page systemd-control-of-alarms

(Dave B, Gerardo M)

We've borrowed the upper screen of video0 to display a striptool with the following channels, H0:VAC-MY_Y5_PT246B_PRESS_TORR and H0:VAC-MY_Y3_PT210B_PRESS_TORR, this is to keep an eye on pressure next to CP4.  This screen is viewable at the CONTROL ROOM (screen shoots), and it carries the title of ASC Error Signals (Pitch, Yaw), located towards the middle of the page.  FYI, the screen is capturing 6 hours only.

WP 7348  --  Corey installed the Septum Window cover.  Nico and Corey passed the cable ends up through the feedthru port where they were secured to the FTs which was then reinstalled.  Dressed the cables across the top then down the side of the chamber.  The ends are currently just hanging on Stage1.

To do -- Closeup the Feedthru gaps on the chamber top (outside.)  Secure the cables to Stage0 (need some 3/8[BSC] cable clamps) followed by some more prettying up.

Also -- Remove a bunch of table top payload to make room for the OPO/ZM1 install.

This afternoon Travis and I made another sweep through refining the ETMY suspension alignments and OSEM adjustments, picking up where we last left off.

• Watching the OPLEV to guide in alignment (while iterating through each step with alignment, locking down, and freedom checks) we:
• Centered and adjusted UIM BOSEMs and magnet-flags
• Took quick TFs to make sure chain was free before more alignment
• Made mechanical YAW correction, quit when we were at 80uRad usage of YAW bias slider (as close as we could get with mechanical adjustments)
• Made PITCH mechanical correction since flag and yaw adjustments threw that off (redistribution of weight)
• Locked down UIM Pitch adjuster screws (which knocked pitch alignment off so had to repeat a few times)
• Re-centered all top BOSEMs in order to run TFs
• Ran quick TFs again.

Next up:  Install BRDs from Kissel, repeat all above if necessary.  Install payload balance of sleeve, wedges, VAs, etc.  Then handoff to next team (TMS).

J. Kissel

I've taken an over-night (un-driven) ASD of the recently aligned L2/PUM OSEMs on the newly freely suspended H1 SUS ETMY, on the hunt for its new highest Bounce and Roll (a.k.a. the V4 and R4) modes. Attached are the results, which clearly show these modes, and they're well resolved in frequency with high SNR. The following are these frequencies in tabular form:
     
     New Values (Hz)
V4        9.7343
R4       13.8433

We'll use these new frequencies to tune up the Bounce & Roll mode dampers that are to be installed in a bit.

TITLE: 02/14 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

I covered first part of shift & handed over to Patrick as I assisted with HAM6 in-vac cable work.  Main activities of the day so far:

• LN2 boil-off inside MY's CP2.
• ETMy SUS binary troubleshooting
• HAM6 VOPO prep work (installing arm, in-vac cables)

LOG:  (items in bold are ongoing)

• Before 16:00 - 17:40:  HAM6 Arm installation starting (Bubba, Mark)
  • 16:55-18:12 TJ joining crew + VOPO install prep
• 16:35 Heading to H1PSL room to continue/finish plumbing upgrade work for 70W (Jeff B)
  • Oberling Heading out to H1PSL room
• 16:45 CP4 work begins (Kyle)
  • 18:44 Chandra joining
• 16:48 EY troubleshooting SUS Binary (Fil)
  • 17:19:  This brought up an "ETMy Hardware Watchdog", but Dave said this was not a "real" one.
  • Also restarted Verbal to see if we get this alarm and we did get the HW & SW watchdog alarms
  • 20:15 out for lunch, said they might need to reboot the IO chasis (Fil)
• 16:50-17:27 EX replace ALS WFS chasis w/ one swapped out yesterday (Mac)
• 17:00-17:18 Laser diode room work (Jason & Peter)
• 17:54-18:56 H1 PSL room to continue work (Jason & Jeff B)
  • 18:27-19:21 Peter joining them
• 18:17-19:27 Working on HAM6 top cable feedthru (Hugh)
• 18:33 Topped Off Crystal chiller as PSL team was working on PSL chiller (left stopper off).
• 19:25 LVEA for dog clamps & covers (Travis)
• 20:16 SUS ETMy work continuing (Travis & Betsy)
• 20:50 Cell phone alarm work (Dave)
• 20:51 HAM6 In-Vac Cabling work (Hugh, Niko, Corey)
• 20:52 Handing Off to Patrick