Detailed discussion with Inclusive and SIDIS PWG on requirements Questions to start discussion - Can you briefly summarise your planned physics programme in terms of processes of interest and (where applicable) basic kinematic ranges in (x,Q2) or other relevant variables. - Which basic detector-level measurements (eg track pT/eta, scattered electron, forward neutron/proton observables, overall HFS, displaced vertices, dE/dx ...) are most essential to realise your physics aims? Can you already say what sort of measurement (acceptance) ranges and resolutions / performance you need? - For charged particles, how important is low p_T acceptance versus high p_T resolution (this informs the optimal choice of magnetic field) - How important is integrated luminosity? For the anticipated integrated luminosities, will your observable be systematic or statistics-limited? If you expect to be systematically limited, which systematic source (or sources) are the most important? - How important is polarisation to your physics programme (quantify if possible, in terms of polarisation level and systematic precision requirements)? If applicable, discuss lepton and hadron polarization separately. - What beam energies are ideal for your physics aims (quantify if possible)?" - How important is the Interaction Region design for your physics observable and do you have criteria that might impact the design? For example, would you be impacted by reduced forward acceptance for neutrons, protons, photons?