TITLE

Experimental investigation of coherent structures in a low-energy electron beam

AUTHOR(S)
Bettega, G.; Cavaliere, F.; Illiberi, A.; Pozzoli, R.; Romé, M.; Cavenago, M.; Tsidulko, Yu.
PUB. DATE
May 2004
SOURCE
Applied Physics Letters;5/10/2004, Vol. 84 Issue 19, p3807
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A sharp transition to a space-charge dominated regime is induced in a low-energy electron beam produced in a Malmberg-Penning trap by increasing the emission current of the source. The transition is characterized by the appearance of a region, around the axis of the beam, not accessible to beam electrons, and by the fast development of coherent structures in the remaining electron plasma, due to the sharp increase of local vorticity. The results are interpreted in the framework of a cold fluid drift-Poisson model, and using a three-dimensional particle-in-cell simulation code.
ACCESSION #
13029154

 

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