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A non-resonant streaming instability driven by cosmic-ray currents, alsocalled Bell's instability, is proposed as a candidate for providing therequired magnetic turbulence of efficient diffusive shock accelerations. Todemonstrate the saturation level and mechanism of the non-resonant streaminginstability in a laboratory environment, we attempt to develop an experiment atthe Photo Injector Test Facility at DESY, Zeuthen site (PITZ). As an electronbeam is used to replace the proton beam to carry the cosmic-ray current in ourexperiment, the polarization of the non-resonant streaming instability will bemodified from the left-handed (LH) mode to the right-handed (RH) mode. Thetheoretical instability analysis shows that the growth rate of this RHnon-resonant mode may be smaller than it of the LH resonant mode. However theLH resonant mode can be ignored in our experiment while the expected wavelengthis longer than the used plasma cell. The results of PIC simulations will alsosupport this contention and the occurrence of non-resonant streaminginstability in our experiment.

A note on the experiment parameters for the non-resonant streaming instability: competition between left and right circularly polarized modes