Injection System. Part I—Van de Graaff Accelerator

Abstract
Protons, for injection into the Cosmotron, are accelerated to about 3.6 Mev in a horizontal, pressurized Van de Graaff accelerator built by the High Voltage Engineering Corporation of Cambridge, Massachusetts. The machine is rated at 4 Mev, peak. A pulsed ion source is included in the high-voltage terminal and is pulsed by an external circuit linked to the ion source through a light beam and photocell. Pulsed ion output includes about 1 ma of protons. The terminal voltage is stabilized to 1 part in 2000 by a servo loop that includes a deflection magnet, split-plate collector, and grid-controlled corona discharge.

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