Discussion 1: How to be become confident to achieve ET LF sensitivity? What is required and what are the risks? (all)
What can be tested before building ET?
What is needed for such tests?
What are the risks of committing to such test in advance of ET?
How to trade off the risks vs confidence gained by funders in ET?
Noises that need consideration: NN, susp, seismsic, radiation pressure noise, control noise, scattered light.
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?
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)
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.
What do we need to include? NN + residual gas noise? Any reduction to be assumed for NN?
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
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