  The CERN accelerator complex prepares protons for the four big experiments at
the Interaction Regions of the Large Hadron Collider (LHC) as well as for a
number of fixed target experiments, which take beam directly from the LHC
injectors. Between 2010 and 2021, a series of major changes were designed and
implemented to the injector complex under the LHC Injectors Upgrade (LIU)
project, with the main goal to enable the injector chain to produce LHC beams
with doubled intensity and brightness. As a byproduct of these upgrades, the
fixed target beams are also expected to benefit and possibly access parameter
ranges previously unexplored. This letter summarises the main fixed target
beams produced by the LHC injectors, their expected performance after the
upgrade for the various beam types and shows first results from 2021 beam
commissioning.
