Biasi, RobertoRobertoBiasiGallieni, DanieleDanieleGallieniBRIGUGLIO PELLEGRINO, RUNA ANTONIORUNA ANTONIOBRIGUGLIO PELLEGRINOVernet, EliseEliseVernetAndrighettoni, MarioMarioAndrighettoniAngerer, GeraldGeraldAngererPescoller, DietrichDietrichPescollerManetti, MauroMauroManettiTintori, MatteoMatteoTintoriMantegazza, MarcoMarcoMantegazzaLazzarini, PaoloPaoloLazzariniFumi, PierluigiPierluigiFumiAnaclerio, VincenzoVincenzoAnaclerioXOMPERO, MARCOMARCOXOMPEROPARIANI, GiorgioGiorgioPARIANIRICCARDI, ArmandoArmandoRICCARDICayrel, MarcMarcCayrelDierickx, PhllippePhllippeDierickxHubin, NorbertNorbertHubinKornweibel, NickNickKornweibelPettazzi, LorenzoLorenzoPettazzi2020-07-212020-07-212015http://hdl.handle.net/20.500.12386/26543We present the current design of the E-ELT M4 deformable mirror consolidated at the conclusion of the Preliminary Design activity. The most prominent features of this system are the SiC Reference Body now mounted to the positioner by a whiffle-tree and cell structure, actuators bricks, capacitive sensors layout and new cooling concept. All this allowed achieving the challenging stability requirements demanded to the M4U, as proved by analysis and test results measured on the Demonstration Prototype, which has been updated to implement the current design. The final design and construction contract is now on-going: Final Design Review is planned on mid 2017 and delivery to site by late 2022.ELETTRONICOenConference paper10.20353/K3T4CP11317182-s2.0-84994529323https://escholarship.org/uc/item/5q66922d#main2015aoel.confE..86BFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_17 Instrumentation – telescopes, detectors and techniques