  There are broadly three channels to probe axion-like particles (ALPs)
produced in the laboratory: through their subsequent decay to Standard Model
(SM) particles, their scattering with SM particles, or their subsequent
conversion to photons. Decay and scattering are the most commonly explored
channels in beam-dump type experiments, while conversion has typically been
utilized by light-shining-through-wall (LSW) experiments. A new class of
experiments, dubbed PASSAT (Particle Accelerator helioScopes for Slim
Axion-like-particle deTection), has been proposed to make use of the
ALP-to-photon conversion in a novel way: ALPs, after being produced in a
beam-dump setup, turn into photons in a magnetic field placed near the source.
It has been shown that such hybrid beam-dump-helioscope experiments can probe
regions of parameter space that have not been investigated by other
laboratory-based experiments, hence providing complementary information; in
particular, they probe a fundamentally different region than decay or LSW
experiments. We propose the implementation of PASSAT in future neutrino
experiments, taking a DUNE-like experiment as an example. We demonstrate that
the magnetic field in the planned DUNE multi-purpose detector is already
capable of probing the ALP-photon coupling down to $g_{a\gamma\gamma} \sim {\rm
few}\times 10^{-5}$ GeV$^{-1}$ for ALP masses $m_a \lesssim 10$ eV. The
implementation of a CAST or BabyIAXO-like magnet would improve the sensitivity
down to $g_{a\gamma\gamma} \sim 10^{-6}$ GeV$^{-1}$.
