Electron Beam Transport and Emittance Measurements in a Long Periodic Solenoid Channel

Abstract

An electron beam transport experiment utilizing 5 kV electrons in a 200 mA beam passing through 36 solenoid lenses is described.The fraction of the beam transmitted is a function of the lens strengths, the length of the channel, the beam size, and the precision of the alignment. Emittance measurements in the 36-lens channel showed no significant degradation compared to a 12-lens channel.

Space-charge limits on the transport of ion beams in a long alternating gradient system

“…There have been experimental results elsewhere [23,24], as well as from this work [25], which have shown that within the limits of the lengtlis of the respective channels, the space-charge forces may be so -jreat as to almost totally cancel the external focusing. In this case, the beam temperature is so low as to be almost totally negligible, and the particle flow in the beam is nearly laminar (a particle will drift from one side of the beam to the other only after traveling through many periods of the focusing channel.…”

Experimental, theoretical, and numerical investigation of the homogenization of density nonuniformities in the periodic transport of a space-charge dominated beam

“…The beam-transport apparatus used in the experiment [17] was designed to investigate the space-charge limited transport of low-emittance beams that are characterized by a suSciently low spread in longitudinal velocity that all particle dynamics can be described nonrelativistically in a frame moving with the beam. Beam dynamics in this frame can then be described by a relatively small number of free parameters so that the experiment can be used, on a scaled basis, to investigate a range of phenomena relevant to a large number of low-emittance beam experiments.…”