The electrostatic generator previously located at Round Hill has been transferred to the M.I.T. grounds in Cambridge. The present generator construction and also a high voltage accelerating tube mounted vertically in one of the columns are described. An account is given of experience with the acceleration of positive ion and electron beams and with the x-ray bombardment of indium, beryllium, and deuterium.
A description is given of a simple and efficient baffle system which results in a vapor trap of high conductance for permanent gas. Two methods for maintaining the temperature of the trap in the range -50° to -80°C are described, one designed for intermittent and one for continuous operation. Measured conductances and over-all performance characteristics are given.
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