LIGO Weekly Report for the week of 16 Feb - 22 Feb 2019

LSC Activities LIGO Laboratory Administration LIGO Laboratory Safety
LIGO Hanford Observatory (LHO) and Interferometer Operations LIGO Livingston Observatory (LLO) and Interferometer Operations Engineering
A+ Data Analysis and Astrophysics LabWide Activities
Laboratory Scientific Computing Laboratory IT Security Laboratory IT Support (GC)
Past Weekly Reports

The LIGO Executive Committee Agenda for Monday 25 February 2019 will be:

(Meeting time: 10:30 Pacific Time/12:30 Central Time/13:30 Eastern Time)

  1. Announcements
  2. LSC - Shoemaker/Cadonati
  3. Commissioning - Fritschel
  4. A+ update – Zucker
  5. Operations Management Team (OMT) - Raab
  6. Observatories
    • Hanford - Landry
    • Livingston - Giaime
    • India - Raab
  7. Campuses
    • Caltech
      • Administration - Hansen
      • Engineering Optical and Mechanical - Coyne
      • Control and Data Systems - Bork
      • Lab Computing - Anderson
      • Instrument Science and 40M - Gustafson
      • Data Analysis and Astrophysics Lab-wide Activities - Weinstein, Katsavounidis
    • MIT - Fritschel
  8. AOB
  9. Adjourn

Calendar of future Executive Committee Meetings

LSC Activities
David Shoemaker (Laura Cadonati)

LIGO Laboratory Administration
Hannah Hansen
Financial Systems
Jamie Goad (Hannah Hansen)
Procurements and Subcontracts Management
Eric Garcia
Technical Writing Services
Kim Burtnyk


General Business Services
Julie Hiroto

LIGO Laboratory Safety
Charles Taylor (Richard Oram, Jeff Jones)

LIGO Hanford Observatory (LHO) and Interferometer Operations
Michael Landry

After a great deal of work by commissioners, calibrators, detector engineers and visitors, H1 achieved a binary inspiral range of 100Mpc. Key changes to deliver this state included 2dB of squeezing, the reduction of broad 60Hz and harmonic line widths, better calibration reflective of the current actuation state, and mitigation of the 9Mz coupling. See the commissioning and detector engineering reports for more detail.

General Operations
Jeff Jones
H1 Commissioning
Daniel Sigg (Keita Kawabe)

The H1 interferometer reached 100Mpc.

For this lock we had squeezed light injection. The dither line used for locking the OMC was increased in amplitude to reduce the broad shoulders around the line harmonics. Also, the 9MHz coupling was particular low during this lock.

The squeezer now has demonstrated 2dB of squeezing. We continue to work on automation, auto-alignment and noise investigations for the squeezer.

More investigation is ongoing on the somewhat mysterious 9MHz coupling. We have implemented a HV driver circuit to bias the second OMC PZT. Since this changes the cavity Gouy phase, it can potentially be used to push higher order optical modes away from the cavity resonance. However, results are confusing since the coupling changes from day to day.

Vacuum Group
Chandra Romel (Jeff Jones)

Kyle Ryan, Gerardo Moreno

Detector Group
Betsy Weaver (Jeff Jones)

From Betsy

From Jason

From Jeff

While on site over the past week (only two days), I've been working on analyzing the recent measurements of ETMX's actuator driver electronics, taken 2 weeks ago (LHO aLOG 46754 and 46854). The problem has been that the supposed short-cut method for measuring the coil drivers in analog produced in strange results which caused non-sensical answers (see discussion in LHO aLOG 46927). So I moved toward trying to integrate the results of the coil driver monitor tests, but those proved more complex to analyze, given the amount of things to account for in the measurement. The former technique for analysis was resulting in 2–3% residual wiggles an intolerable amount so I've spent my time off-site this past week upgrading all of my laptop infrastructure in order to support python, and begin to use IIRrational. In light of my embarrassingly and regretfully slow progress, I was also asked to just quantify the current level of badness, which I did yesterday upon arrival back on site. The measurement indicated that we're under reporting the sensitivity by 12% (see LHO aLOG 47003 for details).

Other uses of my offsite time included review of "Calibrating gravitational-wave detectors with GW170817" for the PnP, completing back log of safety training, and organizing/booking travel for upcoming NIST and LVC meetings.

From Rahul

Control Room Operators
Corey Gray (Richard Mccarthy, Jeff Jones)


Niko Lecoeuche:

TJ Shaffer:

Patrick Thomas:

Work on conversion from TwinCAT2 to TwinCAT3.

Computing and Electronics (CDS, etc.)
Richard Mccarthy (Jeff Jones)

F. Clara, C. Perez, M. Pirello, Ed Merilh, G. Moreno

Information Technologies
Jonathan Hanks (Jeff Jones)

CDS Computing

Bubba Gateley (Jeff Jones)

FACILITIES Vanessa G. Karen R. Chris S.

Major Infrastructure Efforts
Jeff Jones

Timing of LHO site chiller upgrades as a part of PLMP (Property Lifecycle Maintenance Plan) are being assessed this week.

LIGO Livingston Observatory (LLO) and Interferometer Operations
General Operations
Richard Oram

Pre-work for Engineering Run Fourteen ER14 and Observing Run O3

LLO is focused on supporting the planned commissioning period ahead of ER14.

Note ER14 scheduled to commence 3/4/2019 and O3 scheduled to commence 4/1/2019.

LLO had a very challenging week due to a weather related (very heavy downpour) power outage around 6:30 am Wednesday. Power was restored after ~15 minutes outage. This is the longest and most significant power outage in the last three years.

During the the power outage recovery procedure and checklist Operations it become clear that there were some power distortions for a period ahead of the outage which damaged a few unprotected devices. All identified damaged components have been replaced. However, subsequent to the power outage the commissioning team is finding returning the detector to low noise operation challenging. Please see Valera’s commissioning report for details.

Observing Time Loss due to HW/SW/ procedural faults

Summary of LLO Corrective Maintenance issues that have caused Observing Time Loss

We lost about 60+ hours of observing time this week due to faults that required corrective maintenance.

LLO Power Outage: Power restored and recovery still in progress.

Observatory Computerized Maintenance Management.

FRS - Corrective Maintenance

Key Performance Indicator dashboard of issues tracked in the FRS.

FAMIS- Preventive Maintenance

LLO Tuesday Preventive Maintenance Work Orders 2019 (FAMIS)

Vacuum Group
Scott Mccormick (Richard Oram)

Reporting for the Vacuum Team, Harry, Scott McCormick

Detector Group
Janeen Romie (Richard Oram)

Detector Engineering summary for Stuart Aston, Matt Heintze, Adam Mullavey & Arnaud Pele

Control Room Operators
Gary Traylor (Richard Oram)

Reporting for:

Gary Traylor, Mike Fyffe, Doug Lormand, Joe Hanson, Danny Sellers, Tom Evans, William Parker, Raine Hasskew

Doug Lormand, Joe Hanson, Tom Evans

Mike Fyffe

William Parker

Gary Traylor

Danny Sellers

Raine Hasskew

Computing and Electronics (CDS, etc.)
Keith Thorne

Michael Thomas

Alyssa Bramley

Keith Thorne

Paul Corban

Carl Adams, Michael Laxen

Timothy Nelson (Richard Oram)

Facilities Weekly Completed FRS report:

Facilities Weekly Accomplishments / Enhancements:

Education and Outreach
William Katzman

Mechanics, Optics & Vacuum
Fabrice Matichard




Eduardo Sanchez
Control and Data Systems
Rich Abbott

Todd has been working on the assembly of the BRS Heater driver for Luis. He has also evaluated the first article of the new IO chassis that are being constructed now.

Luis has made some good progress on a new lower noise 6.25MHz CLF RFPD. The existing design in service at the sites has an input electronics noise equivalent to the shot noise of ~250uA of DC photocurrent, whereas the new detector has an input elecronics noise equivalent to the shot noise of ~20uA of DC photocurrent. In addition to this work, Luis has been working on the BRS Heater drivers.

Dean has been updating all the documentation associated with the OMC Piezo Driver circuit boards. He has cleaned things up in preparation for ordering new circuit boards to support the recent modifications to the OMC piezo driver at LHO.

The work that is being done by Kavya Sreedar on the next generation Fast Shutter has been progressing. At last report, the shutter would have needed pulses of current of order 1200 volts in order to close the shutter in 1msec or less. After considerable work, the required voltage is now of order 800 volts, and there is a path forward to lower that further. We consider 500 volts to be the target upper limit for the next generation Shutter.

Remote Access
NDS2 (client, server, and server infrastructure)
Jonathan Hanks
NDS2/GDS packaging
Ed Maros

Submitted to testing

MacPorts - testing

Michael Zucker (Garilynn Billingsley, Hannah Hansen, Rich Abbott, Lisa Barsotti, Ken Mason, Richard Oram, Norna Robertson, Chandra Romel, Bailey Toon, Calum Torrie)

Rich and Luis are working with Dave and Conor (UK Team) toward having a review of the Suspension Satellite Module. A report is being written such that a review can take place. Our goal is to convene a review committee and complet the review within the next two weeks.

Dean Schaetzl had been testing the GS–13 preamplifier boards that are shortly to be shipped to MIT for inclusion into the GS–13 pods.

Data Analysis and Astrophysics LabWide Activities
Alan Weinstein
Caltech (CIT)
Shreya Anand
Kent Blackburn
Thomas Massinger
Ling Sun
Hanford (LHO)
Gregory Mendell
Jonah Kanner (Kent Blackburn, Alan Weinstein)

Laboratory Scientific Computing
Juan Barayoga
Sharon Brunett
Peter Couvares
Philippe Grassia
Dan Kozak
Ed Maros


Joshua Willis
Gregory Mendell
Michael Thomas

Laboratory IT Security
Randy Trudeau
Ryan Blair

Laboratory IT Support (GC)
Randy Trudeau
Melody Araya




Philippe Grassia
Veronica Kondrashov
Mike Pedraza
Larry Wallace
Ryan Blair





Dwayne Giardina
Fred Donovan
For additional information about this report, contact Albert Lazzarini