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TY - UNPB AU - Rowe, A.M. ED - Schaa, Volker RW ED - He, Yuan ED - Li, Lu ED - Zhao, Ning TI - SRF Technology for PIP-II and III J2 - Proc. of SRF2017, Lanzhou, China, July 17-21, 2017 C1 - Lanzhou, China T2 - International Conference on RF Superconductivity T3 - 18 LA - english AB - The Proton Improvement Plan-II (PIP-II) is an 800 MeV SRF LINAC Fermilab will build as part of a critical upgrade to the accelerator complex required to serve LBNF/DUNE. The LINAC is a CW capable SRF machine designed to accelerate H⁻ ions with 2 mA average beam current to 800 MeV which will be transported to the existing Booster and Main Injector accelerators. In combination, these accelerators will deliver 120 GeV beam with 1.2 MW beam power to the LBNF target. The PIP-II SRF LINAC is constructed of five cryomodule types starting with a CW 162.5 MHz, β=0.11 half-wave which leads to a β=0.22 and β=0.47 325 MHz single spokes, and concludes with β=0.61 and β=0.92 650 MHz elliptical types. In the future, the PIP-II LINAC will be the front end of PIP-III which will deliver multi-megawatt beam power to DUNE via the Main Injector. The SRF alternative for PIP-III is an SRF LINAC extended from 800MeV to 8 GeV which will inject beam into the Main Injector. This presentation focuses on the five PIP-II cryomodules and the development of critical ancillary components. In several cases, contributions from the India DAE and other International Collaborators are highlighted. PB - JACoW CP - Geneva, Switzerland ER -