IFR transport experiments on the SuperIBEX accelerator

Conducting cells filled with neutral gas at pressures below 100 mTorr (Ion Focus Regime) provide a simple and effective method for the transport and conditioning of intense relativistic electron beams (IREBs). Experiments performed on the SuperIBEX accelerator (5 MeV, 100 kA, 40 ns PWHM) show that desired output beam profiles can be effectively generated through the manipulation of cell geometry, gas pressure and species, and input beam emittance and current. The cells also provide some beam centering and sweep damping. The beam profiles are measured using a concentric segmented Faraday collector (SFC), EMACON 500 streak camera, and a four-frame, ultra-fast, gated optical imaging system (GOI).