PLANTET, CEDRIC ANTOINE ADRIEN GABRIELCEDRIC ANTOINE ADRIEN GABRIELPLANTETBond, Charlotte Z.Charlotte Z.BondGiordano, ChristopheChristopheGiordanoAGAPITO, GUIDOGUIDOAGAPITOTaheri, MojtabaMojtabaTaheriESPOSITO, SimoneSimoneESPOSITOWizinowich, PeterPeterWizinowich2020-11-132020-11-132018978151061959397815106196090277-786Xhttp://hdl.handle.net/20.500.12386/28314A future upgrade of the Keck II telescope's adaptive optics system will include a near-infrared pyramid wavefront sensor. It will benefit from low-noise infrared detector technology, specifically the avalanche photodiode array SAPHIRA (Leonardo). The system will either operate with a natural guide star in a single conjugated adaptive optics system, or using a laser guide star (LGS), with the pyramid working as a low-order sensor. We present a study of the pyramid sensor's performance via end-to-end simulations, including an analysis of calibration strategies. For LGS operation, we compare the pyramid to LIFT, a focal-plane sensor dedicated to low-order sensing.ELETTRONICOenConference paper10.1117/12.23131902-s2.0-85053550097000452819300096https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10703/2313190/Keck-II-adaptive-optics-upgrade--simulations-of-the-near/10.1117/12.2313190.short2018SPIE10703E..35PFIS/05 - ASTRONOMIA E ASTROFISICA