ARRANGEMENT AND METHOD FOR FIELD EMISSION

摘要

The present invention relates to an arrangement (1) for field emission with at least one extraction grid (1) comprising elements (6) with high electrical and thermal conductivity. The space in between elements (6) is transparent for electrons (5). The present invention further relates to a method to provide field emission electrons (5) from a source, emitted by a cathode (2) and accelerated in an electric field (4) between cathode (2) and at least one extraction grid (1), passing the at least one extraction grid (1) in a direction away from the cathode (2). A high amount of electrons (5) pass through the grid (1) and electrons absorbed by the grid (1) are transferred in high amount as current through the grid (1) with small amount of heat production within the grid (1).