Nonlinear Phenomena in Microphysics of Collisionless Plasmas. Application to Space and Laboratory Plasmas
J. Phys. IV France 05 (1995) C6-89-C6-92
A Trochoidal Monochromator to Measure Electron Beam Energy Distribution in Axial Magnetic FieldD. Guyomarc'h and J.M. Layet
Equipe Turbulence Plasma, Laboratoire de Physique des Interactions Ioniques et Moléculaires, URA 773 du CNRS, Université de Provence, Institut Méditerranéen de Technologie, 13451 Marseille cedex 20, France
The trochoidal monochromator is commonly used to produce a monoenergetic electron beam in an axial magnetic field. By adding a retarding electric field system at the entrance, and a Faraday cup at the exit of the monochromator, such a dispersive device can be used to measure the energy distribution of an electron beam. An experimental set-up composed of an electron gun and the trochoidal analyser is described. A monoenergetic cold beam is produced and analysed in an axial magnetic field. This set-up will be used in a travelling wave tube in order to study wave particle interactions.
© EDP Sciences 1995