RADLAC-II EXTRACTION EXPERIMENTS

We have extracted the intense magnetized annular electron beams from the vacuum and the solenoidal magnetic field of the RADLAC II accelerator into a magnetic field-free, air-filled region. It was established experimentally that under proper matching condtitions the extracted beam propagates into and through the magnetic field region with no severe perturbation of its equilibrium. The accelerators used for these experiments were IBEX and RADLAC II. The observed beam parameters before and after extraction are in agreement with the theory and numerical calculations.