The Construction and Operation of a Cyclotron to Produce One Million Volt Deuterons

Abstract

A cyclotron for producing one million volt deuterons is described. The general magnetic field characteristics, and the effect of shims on the magnetic field have been examined. The production of ions for acceleration with and without filaments is discussed. The operation with a continuous glow discharge in the vacuum chamber is possible only because a transmission line is used to feed power to the dees. Various construction and operation details are given. The cyclotron has been found very reliable in operation and a maximum ion beam of 11 microamperes has been maintained for long periods of time. The beam has been removed in vacuum to a point about four feet from the vacuum chamber and partially focused. This allows bombardment work to be done with little interference from background radiation and high intensity fields.