  Plasmas created by high-intensity lasers are often subject to the formation
of kinetic-streaming instabilities, such as the Weibel instability, which lead
to the spontaneous generation of high-amplitude, tangled magnetic fields. These
fields typically exist on small spatial scales, i.e. "sub-Larmor scales".
Radiation from charged particles moving through small-scale electromagnetic
(EM) turbulence has spectral characteristics distinct from both synchrotron and
cyclotron radiation, and it carries valuable information on the statistical
properties of the EM field structure and evolution. Consequently, this
radiation from laser-produced plasmas may offer insight into the underlying
electromagnetic turbulence. Here we investigate the prospects for, and
demonstrate the feasibility of, such direct radiative diagnostics for mildly
relativistic, solid-density laser plasmas produced in lab experiments.
