  We propose a novel way to search for feebly interacting massive particles,
exploiting two properties of systems involving collisions between high energy
electrons and intense laser pulses. The first property is that the
electron-intense-laser collision results in a large flux of hard photons, as
the laser behaves effectively as a thick medium. The second property is that
the emitted photons free-stream inside the laser and thus for them the laser
behaves effectively as a very thin medium. Combining these two features implies
that the electron-intense-laser collision is an apparatus which can efficiently
convert UV electrons to a large flux of hard, co-linear photons. We further
propose to direct this unique large and hard flux of photons onto a physical
dump which in turn is capable of producing feebly interacting massive
particles, in a region of parameters that has never been probed before. We
denote this novel apparatus as ``optical dump'' or NPOD (new physics search
with optical dump). The proposed LUXE experiment at Eu.XFEL has all the
required basic ingredients of the above experimental concept. We discuss how
this concept can be realized in practice by adding a detector after the last
physical dump of the experiment to reconstruct the two-photon decay product of
a new spin-0 particle. We show that even with a relatively short dump, the
search can still be background free. Remarkably, even with a 40 TW laser, which
corresponds to the initial run, and definitely with a 350 TW laser, of the main
run with one year of data taking, LUXE-NPOD will be able to probe uncharted
territory of both models of pseudo-scalar and scalar fields, and in particular
probe natural of scalar theories for masses above 100 MeV.
