Lombardi, A.M. JACoW Publishing Geneva, Switzerland 2226-0366 978-3-95450-194-6 10.18429/JACoW-LINAC2018-TH1P01 English 658-662 TH1P01 linac MMI injection proton emittance Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-LINAC2018-TH1P01 http://jacow.org/linac2018/papers/th1p01.pdf This talk reviews the commissioning effort of CERN’s new H⁻ linear accelerator, Linac4, which is presently undergoing a beam quality and reliability run. Linac4 will be connected to the LHC proton injector chain during the next long LHC shutdown (LS2) and will then replace the 50MeV proton Linac2.