J. Oberling, E. Merilh

The PSL tripped out this morning due to the commissioning work detailed here.  The cause is the ILS losing lock, which then triggered the HPO power watchdog and shut off the HPO; the 35W FE and the chillers remained operational.  The system recovered without issue and is now back up and running.  I took the opportunity to reset the injection locking counter in both Beckhoff and the Laser MEDM screen, and tweaked up the beam alignment into the PMC (hooray for remote control!) to recover the PMC transmitted power we had yesterday (alignment drift due to temperature changes in the PSL enclosure with the environmental controls on and off).

Keita Daniel

Yesterday, a large oscillation around 1 MHz was observed on the DC readout of the PMC locking diode. The DC readout is tapped directly at the HF transimpedance amplifier with a 50 Ω series resistor, see D1002163. It is available at the rack and hooked to the trigger PD input of the field box. There doesn't seem to be any termination on the rack side! The DC level of the PMC readback was about 120 mV, whereas the ILS PD showed about 1 V. The transimpedance for the PMC locking diode is 1 kΩ, where it is 820 Ω for the ILS diode. No oscillation was observed. We also looked at the signal on the RF spectrum analyzer. But, when we tried it for the ILS, the HPO tripped. End of expedition.

• No operator last night
• IFO not locked. Doin initial alignment
• Sitting in for Cheryl. She has an appointment this morning

Added 175ml to the crystal chiller

We had at least one lockloss tonight that seemed to be caused by SR2 glitches. Screenshot is attached. 

It seems like SR2 was noisier after maintence day today.  

But our main problem tonight was that the refl WFS (which we have taken in and out several times over the last week) don't work when the microseism is around the 90th percentile or more.  

Jeff K, Sheila, Nutsinee, Dave (on phone)

We got a verbal alarm warning that TCS chillers are about to trip. On OAFIOP GDS TP screen -- ADC, DAC, IPC, and DK were red. We restarted the model following procedure from alog27435. For the record temperature goes down 0.1 C per minute, which gives us about 50 minutes to recover as soon as OAF crashed (Sorry Jeff, we probably could have waited until your measurement was finished). As soon as the model got restarted PI Mode27 jumped up and broke the lock. That part was unclear why.

CDS Overview

For each model, if their SDF diff count channel is greater then zero and the ALL button is pressed, an additional pink rectangle is displayed next to the red circle

DAQ Overview

while h1fw2 is running with a later version of frame-cpp, the 64 second frame file it writes should be 2 bytes smaller than fw0,1 frame. The RED/GREEN bars next to FW2 frame size will be GREEN,GREEN if this is the case. This modification has not been applied to fw0,1's comparison with fw2, so their bars should be GREEN,RED. The MD5 sums will always differ between fw0,1 and fw2 by an unknown factor.

MEDM snipet attached

24V was tied from CER power racks to junction boxes in LVEA. New 24V will power the following:

1. Photodiode amplifier units (Beckhoff terminals)
2. New ITM spool camera (to be installed, Beckhoff terminal)
3. BRS system (next to BSC3)
4. RGA installed next to HAM4
 

Cable run goes from CER mezzanine to junction box on top of SUS-R3 (next to HAM4). From this junction box, we split to junction boxes on top of SUS-R5 and SUS-R6. As of now, nothing on the floor is being powered off the new 24V line. New work permit will be required as certain items will need to be powered off.

Compressors #1 and #2 were greased and pressure tested @ X-MID station.
Compression test results:  #1 at 135 psi, and #2 at 130 psi.
All compressors and electrical motors were greased.

Both relief valves passed their test.

Both compressors were run tested after service was performed.

Work performed under WP#6309.

Today we took calibration measurements of both end station PCals.  See full reports attached if interested.  In summary, the newest calibration for EX looks good with the new RX/WS and TX/WS ratios being less than a tenth of a percent from the old values.  For EY, the ratios are ~0.5% from the old values.  Looking at the raw plots, there is some biased noise showing up from the WS and a very suspect shelf that comes and goes during separate measurements.  We would like to retake the EY measurements at the next availability since Darkhan and I believe that it is possibly due to a funky power source we have been using with the WS current amplifier (a 3-way extension cord with a power strip plugged in). 

Carlos set the BRS Beckoffs to run on the KVM display.  The display cables are right next to the GIGE cable coming from the BRS camera.  While the Y and X situation appeared different because Carlos restarted EndY but not EndX, neither system was working correctly as it would appear the camera data was not getting to the computer.

Patrick spotted this suttlety as the cable was sort of plugged in but not snapped/latched and had no indication of data stream.  Once these were secured, and the codes restarted, the BEAMs damped quickly and appear to be running normally.

DaveB feels this cable will likely work its way loose with any activity wiggling the connection and may be best to re-terminate the connector.

State of H1: made it locked in NLN

Assistance: Betsy, JeffK, Sheila, Richard

Activities: 

• visits to EY and EX for BRS
• some alignment was needed in Check MICH, PRMI, and then DRMI locked - JeffK, Sheila
• lock loss as shift change
• handing off to Nutsinee

Currently:

• Hugh at EX working on BRS
• Dave and Jim heading to EY to look at the computer

WP6287 Add PEM ADC card to h1oaf0

Jim, Dave, commissioning

this turned into a large task. Please see alog 31316 for details. Currently the ADC card is in the chassis and we are not seeing any errors. We will monitor for any recurrence of ADC/DAC errors on this system, or nf_conntrack table errors.

WP6295 Add PEM-EX chans to DAQ for ESD-PS monitoring

Ansel, Robert, Dave

h1pemex was modified to add three test ADC channels to the DAQ at 2048Hz.

WP6303 Run later version of Frame-cpp on DAQ FW2

Jonathan,

as a test of using frame-cpp version 2.5.2 in the DAQ, the new version is being tested on h1fw2. This is the latest version supported by Ubuntu-12. It does have the leap-second modification needed for 31Dec2016.

WP6307 Add BRS Beckhoff computers to CDS KVM

Carlos

The new Beckhoff branded BRS computers at EX and EY were added to the KVM so we don't need to support an additional monitor, keyboard and mouse. These computers do not have an on/off switch, so we are unable to stop them booting up when power is restored after an outage.

WP6306 Update Hartmann Wavefront Sensor channels into DAQ

Kiwamu, Nutsinee, Dave

I have updated the H1EDCU_HWS.ini file now all four hws systems are running the new python code. Starting with the EPICS database file, I made a list of non-string channels (i.e. binary and analog channels).

Interestingly ITMX was found to be missing 14 channels which appear in the other systems. These channels have ITMM in their names. After discussion with Kiwamu and Nutsinee we decided to remove these from the ini file for now.

DAQ Restart

Jim

DAQ was restarted to: add ADC to h1iopoaf0, add chans to h1pemex, add new H1EDCU_HWS.ini.

J. Kissel, D. Tuyenbayev

Following preliminary results from Darkhan on the individual actuation strength of the UIM and PUM stages for H1SUSETMY (see, thus far LHO aLOG 31275), and the current delightfully long lock stretch with them in place, I'm bringing this study to a close. I've turned off the temporary L1 and L2 calibration lines at 33.7 and 34.7 Hz, respectively. We do not intend on turning on these lines again for the duration of the run.

These lines were turned OFF at Nov 07 2016 21:21:49 UTC.