Design, Construction of a Small Electron Accelerator

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Date
2009-04-04
Authors
Thomson, Stephen
Lloyd, Phillip
Yuly, Mark
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Houghton College
Abstract
The Houghton College electrostatic electron accelerator uses a small Van de Graaff generator and an accelerator column made from alternating high-density polyethylene and aluminum rings to create a uniform electric field. The accelerator column is evacuated to about 10-6 torr by a rotary forepump and a diffusion pump. To produce the electrons, an electron gun made from a 3RP1 CRT is located inside the high voltage terminal. The electrodes of the electron gun require user-controlled voltages for the anode, focus and intensity grids. Since the gun is located in the HV terminal, a microcontroller/amplifier circuit was designed to produce the required voltages and communicate with the user via a non-conducting, fiber optic RS232 link. The remote control system has been tested on the electron gun attached to the vacuum system.
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Event
XXVIII Annual Rochester Symposium for Physics Students, US Military Academy at West Point, West Point, NY, April 4, 2009.
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