[en] The experimental part of Argonne's heavy ion fusion program is directed toward demonstrating the first, and in many ways most difficult, section of a viable accelerator facility for heavy ion fusion. this includes a high current, high brightness, singly charged xenon source, a dc preaccelerator at the highest practical voltage, and a low beta linac of special design. The latter would demonstrate rf capture with its attendant inefficiencies and accelerate ions to a velocity acceptable to more conventional rf linac structures such as the π-3π Wideroe. The initial goals of this program are for a source current of 100 mA of Xe⁺¹, a preaccelerator voltage of 1.5 MV, and less than 50% loss in rf capture into the low beta linac. A linear accelerator is proposed with a voltage gain up to 200 MV as a minimum which would form the initial stage of an operational heavy ion fusion facility irrespective of what type of acceleration to high energies were employed beyond this point