ET design update telecons

We will use team speak for the telecons together with slides posted on the wiki.

Teamspeak details are

• server: zam.mit.edu
• password: la$er
• channel: ET

Telecons are usually held on every second Wednesday of a month, 4pm-5pm CET, 3pm-4pm UK time.

The next dates are:

• 10th of July 2019
• 14th of August 2019
• 11th of September 2019
• 9th of October 2019
• 13th of November 2019
• 11th of December 2019

• Updates for ET site parameter evaluation WG2 and WG3:
  1. Federico Paoletti for WG2 (sensors and sensor installation): SLIDES
  2. Lino Grado for WG3 (site conditions: geology, (geo) hydrology, accessibility,…): SLIDES
• Updates/summaries from recent meetings (GWADW, DAWN V etc)
• AOB

Recording of the call: mp3-file

• N. De Lillo, A. Utina, A. Singha: “3G sensitivities and how to and how to look at them.” Slides ppt, pdf
• A. Singha: “A time domain simulator for ET” Slides ppt, pdf

• Eugene Polzik: “GWD beyond SQL with the negative mass spin oscillator” slides (ppt; pdf)
• Riccardo DeSalvo: “Considerations to reduce beamsize on ET beamsplitter” (slides, document)
• All: Any other updates/news

• Jan Harms: Site Evaluation Parameters
• Michele: Updates from meeting with APPEC + updates from ET-steering group meetings.

• Matt Pitkin et al: “Evidence for a minimum pulsar ellipticity?” (Slides, Paper)
• Matyas Vashut: “Seismic noise measures” (slides)
• Updates re ESFRI roadmap application
• Any other news

• Raffaele/Tomek: Current Thinking on ET collaboration governance structure (slides)
• Sathya: Summary from GWIC 3G Science team meeting at AEI-Golm https://www.dropbox.com/sh/6ffhwmadnacwfwl/AADdKud1k1e0Y_eZteOm2qD6a?dl=0
• Michele Maggiore: ”How to study dark energy with ET?” (1805.08731)
• News on ET (all)
• AOB

• Quick update from DAWN IV meeting (David S., all), Program: https://indico.nikhef.nl/event/1174/ Slides: https://dcc.ligo.org/cgi-bin/DocDB/DisplayMeeting?conferenceid=1012
• News from ESFRI and APPEC (Michele). Note 2018 ESFRI roadmap now available here: http://roadmap2018.esfri.eu/
• Discussion 1: How to be become confident to achieve ET LF sensitivity? What is required and what are the risks? (all)
  1. What can be tested before building ET?
  2. What is needed for such tests?
  3. What are the risks of committing to such test in advance of ET?
  4. How to trade off the risks vs confidence gained by funders in ET?
  5. Noises that need consideration: NN, susp, seismsic, radiation pressure noise, control noise, scattered light.
  6. Do we need a detailed technical noise budget (simulink NB or similar)? If yes, what level of detail is required? If yes, how can we organise this development as teamwork?
  7. Would it be useful to define a target/maximal slope of the LF wall (Think something 8 orders of magnitude in h/ decade in frequency)
• Discussion 2: How to calculate the ET facility limits? (all)
  1. Background: We always make an emphasis that ET is an infrastructure, not a single detector generation. One way to stress this further would be to always show a strain facility limit in addition to any ET strain sensitivities we show.
  2. What do we need to include? NN + residual gas noise? Any reduction to be assumed for NN?
• Any other news or topics?

• Hinderer: Quick example of frequency dependence of source parameters for ETD (slides)
• Punturo et al: Discussion of new draft of letter of intent (LoI) https://1drv.ms/b/s!AmoHzai09yjjgaVDLOd-ViZe_Xy7Rg
• Update on Italian government announcement re ET support for Sardinia bid
• Organisation of Upcoming ET meeting, April 19-20th: http://events.ego-gw.it/indico/event/9thETsymposium

• Martin/Steinlechner: 12 times coating noise reduction at 2um (slides)
• Punturo: Discussion of draft of letter of intent (LoI) https://www.dropbox.com/s/vnbh5xjt7txi0eg/Letter%20of%20Intent%20-%20v2.0.pdf?dl=0
• Update from Liege meeting; webpage: http://einsteintelescope.ulg.ac.be/
• Upcoming ET symposium, April 19-20th: http://events.ego-gw.it/indico/event/9thETsymposium

• Updates from the Appec Strategy Launch event, https://indico.nikhef.nl/event/767/
• Stefan Hild and Jan Harms: “Some questions about ET site selection”, slides — Volunteers to further look into this: Jan Harms, Stefan Hild, Ed Daw, Niels van Bakel, Tomek Bulik
• Peter Ván and Laszlo Somlai: “Long term seismic noise in Matra” https://mydrive.kfki.hu/f/498cf310b8/?dl=1
• Sebastien Clesse: Belgium local ET meeting: https://events.uliege.be/telescope-einstein/programme/

• Updates from APPEC meeting in Barcelona (M. Punturo)
• Plans for the launch of the new APPEC strategy document (J. v. Brand) - link to European Astroparticle Physics Strategy 2017-2026 http://www.appec.org/roadmap
• Alignment noise copupling with large beams (A. Freise)
• GWIC 3G Science case efforts (Sathya)
• next steps
• Link to ESFRI questionaire: http://www.esfri.eu/sites/default/files/docs/ESFRI%20Roadmap%202018_Proposal_Submission_Questionnaire_Public.pdf