thumb|right|The 2.5 MeV Pelletron accelerator SIRIUS at the École polytechnique A Pelletron is a type of electrostatic generator, structurally similar to a Van de Graaff generator. Pelletrons have been built in many sizes, from small units producing voltages up to 500 kilovolts (kV) and beam energies up to 1 megaelectronvolt (MeV) of kinetic energy, to the largest system, which has reached a DC voltage of over 25 megavolts and produced ion beams with energies over 900 MeV.
thumb|right|The 2.5 MeV Pelletron accelerator SIRIUS at the École polytechnique A Pelletron is a type of electrostatic generator, structurally similar to a Van de Graaff generator. Pelletrons have been built in many sizes, from small units producing voltages up to 500 kilovolts (kV) and beam energies up to 1 megaelectronvolt (MeV) of kinetic energy, to the largest system, which has reached a DC voltage of over 25 megavolts and produced ion beams with energies over 900 MeV.
According to the review paper of F. Hinterberger the pelletron was first developed in the mid 1960s by Prof. Raymond Herb. In 1965 Ray together with J. A. Ferry and T. Pauly founded the National Electrostatics Corporation, to manufacture pelletrons as a solution to the problems of ever larger Van de Graaff machines required at that time for particle physic research.
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