Spectroscopic measurements of turbulent Langmuir fields at the relativistic electron beam experiment REBEX

The relativistic electron beam experimental facility REBEX operated in IPP Prague for already many years (cf. e.g. [1]) makes it possible to study the beam-plasma interaction in a large variety of beam and plasma parameters. The facility (Fig. 1) consists of an electron beam accelerator and of a vacuum interaction chamber with plasma sources and external magnetic field system. Numerous beam and plasma diagnostics, and a sophisticated data acquisition system represent an integral part of the experiment.