On Tuesday 11th October we installed the ITMX and ETMX hardware watchdog chassis (HWWD) in monitor mode, which completes the install of the four HWWD chassis.

Previously we had found that the ITMY HWWD reported LED-current-monitor undervoltages which were not been seen on ETMY. In the past 24 hours we have now seen similar events on ITMX, which suggests the longer cabling to the ITM systems may be a factor.

For the past 20 hours, I plotted the ITMX HWWD LED-current-monitor status against an OSEM coil drive signal (I chose top stage F1 as a representative example). There is a clear correlation between coil drive activity and the detection of a low voltage on the LED-current-monitor as seen by the HWWD (shows up as STAT_OUT = 8). I've attached two plots, one showing the two signals separately, on the other I have scaled the coil drive signal to a compatible Y-axis scale and plotted them together.

State of H1: locking, some issues with PI, with Tara's fix H1 is going to Nominal Low Noise

Assistance:  Tara, Jenne, (Richard, Jason, earlier today)

NOTE:  If TCSY tripps off, please call Kiwamu or Nutsinee before restarting, they are hunting errors, so need to see the system before restart

Activities:

• Chandra MY CP4 work - red on VAC overview and in alarm
• Gabriele H1 alignment investigation
• Tara PI mode 26 changed, and damping wasn't working, she fixed, see her alog
• I set the ALS wrong polarization for Y and X arms  - see my alog, and comment
• Once aligned, locking H1 has gone well up to DC readout, then PI modes need to be watched

Currently:

• Gabriele and Jenne working on alignment and offsets

Not much IFO up time so far, but this morning I managed to move SRM in both pitch and yaw, and see a reduction of the noise. I recall this was already know. Moving pitch by about +20 urad seems to give the best position. Also the SRC1_P error signal respond quite well to the motion, and it seems to cross zero at the right position. Also, after SRM pitch is aligned, the SRC1_Y error signal repond to yaw motion of the SRM. So it looks like we should be able to close SRC1 both P and Y, although with small bandwidth.

The attached plot shows:

• first row: BLRMS of the "jitter noise";
• second row: the offsets I was adding to SRM alignment
• third row: SRC1 error signals.

With new thermocouple installed inside vertical section of exhaust pipe, I overfilled CP4 today. TC registered LN2 with very little forewarning. Temp fell to -60 deg C with LN2 trickling out exhaust (bypass exhaust valve open and check valve removed).

1:30 pm local

Took 20 sec to overfill CP3 with 1/2 open on bypass LLCV, but found the entire exhaust line frosted over with a pile of snow on ground. Looking back at last year's LLCV level after a Dewar fill, I decided to lower the LLCV yet again from 17% to 16%. 

Left bypass exhaust valve open.

• Y arm in green wouldn't lock because the wrong polarization was greater than 20.
• Jenne walked me through the procedure to adjust the polarization.
• The Y arm wrong polarization was reduced to 0%, the X arm wrong polarization was at 12% and was reduced to 4%.

I added a second class to (userapps)/sys/common/guardian/cdslib.py for the Beckhoff FEs. This will look through the autoburt.req's that are created upon build, and find the DCUID from the model name, or vise versa. Code is loaded in and committed and the diffs are being reported.

[Jenne, Cheryl, Nutsinee]

We tweaked the calibration of the PSL rotation stage, which hadn't been done since the power incident on the rotation stage was adjusted about a week ago.  Now hopefully a 50W request will give us 50W, rather than some higher value.  Nutsinee has her script ready for next time, so we can try doing it automatically rather than by hand.

State of H1: locking and has made it to Low Noise

Activities:

• early AM, locked from Ed's shift, Gabriele working on alignment
• lock loss
• TCSY laser tripped, Richard and Jason get it back, Jason had to reset electronics to clear a FLOW FAULT
• locking not good until TCSY was back on for 20-30 minutes
• TJ covered for about an hour
• handled and H1 alignment issues
• ushered H1 to DC Readout
• damping since bounce and roll rang up, mode 26 rang up
• I return
• H1 to Low Noise and mode 26 killed the lock
• ALSO power from the PSL was 55W, not 47W as requested, which contribulted to H1 issues
• after lock loss requested 2W power out of the PSL was reading 2.4W, which explains the 54W lock
• Jenne recalibrated the rotation stage by hand, Nutsinee has a script modified if we need ot do again, needs a bit more documentation
• back to DC Readout, mode 26 still an issue, waiting here for it to ring down, and also Tara is looking into damping it faster

Other Site Activities:

• Christine to MX
• Chandra to MY, CP4
• Kyle / Joe past card reader to turn on canister for DI water

I have created new DAQ and HWWD oveview screens. The DAQ displays the additional diagnostics information Jonathan's new code produces. The HWWD includes the ITMX and ETMX systems which were installed yesterday, and shows which systems are connected to the ISI coil drivers.

I added 250mL of water to the TCSy chiller this morning, bringing the reading on the scale from 4.5 to 9.0.

In addition, the TCSy CO2 laser tripped out this morning on a flow alarm.  Peter and I reset the laser box (key off, then key on) to clear the alarm and restart the laser.  Cheryl had trended the flow channel for the CO2 laser and indeed the flow dropped to zero and recovered (I don't have the trend, perhaps Cheryl will post it later).  Maybe an air bubble working its way through the system?

(Late entry for yesterday's Maintenance Day activity)

Kyle, Gerardo

Scheduled preventative maintenance -> Measured discharge pressure to be =/> 115 psi - OK, greased motor shaft bearings with Chevron SRI and scroll compressor orbital shaft and crank pin bearings with Anest Iwata SL-140.  Belts visual and adjustment - OK.  

WP6232 Upgrade frame writers

Jonathan, Jim B, Dave:

h1fw2 was running with close to the new code, it was upgraded to add the md5 filename change only. Quickly following h1fw0 and h1fw1 were upgraded to the latest code. I am updating the DAQ MEDM to show the new diagnostic md5 check sum data.

WP6217 ISI frontend code upgrade

Hugh, Jim B

All ISI models were restarted with new code

WP6227 HEPI frontend code upgrade

Hugh, Jim B

All HEPI models were restarted with new code.

WP6235 PSL-DBB jitter feed-forward to LSC

Daniel, Gabrielle, Dave:

New code on the h1psldbb exports the jitter signal as a 64kHz Dolphin channel. The h1lsc model uses this feed-forward data. Change added a 16kHz LSC DQ channel to the commissioning frame.

WP6242 Migration of virtual machines to proxmox

Carlos

Old vmware virtual hosts were migrated to the new Proxmox system.

WP6236 SUS ITMX.ETMX model changes for HWWD install

Fil, Richard, Jim B, Dave

sister wp to 6234. The ITMX and ETMX hardware watchdogs were install. The h1susitmx, h1susetmx models were modified to read the HWWD status via the binary input feed from these chassis. Since we are not controlling these units, I did not put in the binary output logic.

WP6229 h1tcscs model change for SIM parts

Kiwamu, Dave

A new h1tcscs model was installed. We verified that the TCS CO2 chillers behaved correctly on loss of temperature control voltage.

WP6231 GDS-DMT upgrade

team-GDS

Code was upgraded, no impact was seen from the control room

WP6239 PSL-ISS model change

Daniel, Dave

New h1psliss model was installed. This was done at the same time as the h1psldbb change.

WP6240 Beckhoff Slow Controls change

Daniel, Dave

Daniel installed new PLC code. I updated the DAQ INI files, the target autoBurt.req files and the Beckhoff SDF monitor files.

WP6238 CAL-CS model change

Darkhan, Jeff K, Dave

a new h1calcs model was installed.

DAQ restarts

Dave:

The DAQ was restarted several times today to support the above work.

(note we did not get to removing h1ldasgw2 WP#6237, will defer this to later in the week)

LP_v_H4 shows the laser output power and the head 4 flow rate.  At this point in time the flow rate trip
0.2 lpm.  The drop in laser power seems to coincide with the increase in flow rate.

XC_v_H4 shows the output of the crystal chiller and the head 4 flow rate.  The chiller clearly switches
off after the spike in the head 4 flow rate.

InletP_v_H4 shows the inlet pressure versus head 4 flow rate.  The oscillations in pressure take place
after the spike in the flow rate.  The same is true for the outlet pressure.

    The sudden increase in the flow rate perhaps suggests that something in the flow sensor may have
been dislodged but I (PK) would expect that the flow rate would not drop to zero but to some other
non-zero value.  Unless there was a following object that promptly jammed things up.  But things started
up okay for the subsequent startup.

    The various filters in the system are clean from a visual inspection.




  Jason/Peter

Evan, Daniel

17:12:30 UTC Oct 7 2016:

• RF modulation off for 9 and 45 MHz
• 45 dB whitening gain compensated by a filter gain of 0.0056
• 1 stage of whitening, compensated
• V/ct filter engaged, referred to TNC ouptut of 2-chn demod board
• Dark

17:16:30 UTC Oct 7 2016:

• same input configuration
• 29 mA of photocurrent

17:18:30 UTC Oct 7 2016:

• turn DC centering of REFL WFS on

17:24:30 UTC Oct 7 2016:

• turn DC centering off again
• 14.8 mA of photocurrent

17:32:00 UTC Oct 7 2016:

• 9 MHz modulation on
• 14.8 mA of photocurrent
• DC values: 9I = 3.7 mV; 9Q = 9.5mV

17:34:30 UTC Oct 7 2016:

• 9 MHz modulation on
• 29 mA of photocurrent
• DC values: 9I = +7.2 mV; 9Q = +18.1mV

18:06:30 UTC Oct 7 2016:

• 9 MHz and 45 MHz modulation on
• 29 mA of photocurrent
• DC values: 45I = –14.3 mV; 45Q = +62 mV