  Plasmas with electromagnetic fields turbulent at sub-Larmor-scales are a
feature of a wide variety of high-energy-density environments, and are
essential to the description of many astrophysical/laboratory plasma phenomena.
Radiation from particles, whether they be relativistic or non-relativistic,
moving through small-scale magnetic turbulence has spectral characteristics
distinct from both synchrotron and cyclotron radiation. The radiation, carrying
information on the statistical properties of the magnetic turbulence, is also
intimately related to the particle diffusive transport. We have investigated,
both theoretically and numerically, the transport of non-relativistic and
trans-relativistic particles in plasmas with high-amplitude isotropic
sub-Larmor-scale magnetic turbulence, and its relation to the spectra of
radiation simultaneously produced by these particles. Consequently, the
diffusive and radiative properties of plasmas turbulent on sub-Larmor scales
may serve as a powerful tool to diagnosis laboratory and astrophysical plasmas.
