  The upcoming long baseline neutrino experiments aim to enhance proton beam
power to multi-MW scale and utilize large-scale detectors to address the
challenge of limited event statistics. The DUNE experiment at LBNF will test
the three neutrino flavor paradigm and directly search for CP violation by
studying oscillation signatures in the high intensity $\nu_{\mu}$
(anti-$\nu_{\mu}$) beam to $\nu_{e}$ (anti-$\nu_{e}$) measured over a long
baseline. Higher beam power and improved accelerator up-time will enhance
neutrino flux for the neutrino program by increasing the number of protons on
target. LBNF/DUNE, as well as PIP-II upgrade and Accelerator Complex Evolution
(ACE) plan, play a vital role in this effort. The scientific potential of ACE
plan extends beyond neutrino physics, encompassing endeavors such as the Muon
Collider, Charged Lepton Flavor Violation (CLFV), Dark Sectors, and exploration
of neutrinos beyond DUNE.\par In the era of higher-power accelerator operation
, research in target materials and beam instrumentation is crucial for
optimizing design modifications. This abstract discusses Fermilab ACE, the
science opportunities it provides, and how Fermilab is pushing the limits of
proton beam power and accelerator infrastructure. By tackling neutrino beam
challenges and exploring research and development ideas, we are advancing our
understanding of fundamental particles and their interactions.
