ARRAY STRUCTURES FOR FIELD-ASSISTED POSITRON MODERATION AND CORRESPONDING METHODS

摘要

Apparatuses and methods for the moderation of positrons are provided herein. The apparatus may include a structure consisting of linear arrays of electrode and semiconductor structures of generally planar or cylindrical form with vacuum gaps between each element electrode. This structure may be contained within a vacuum chamber. The positron source may be positioned adjacent to the moderator structure or the electrodes may act as the positron source by pair production through bombardment of high energy photons, electrons, or neutrons. Positrons from this source may be implanted into the moderator material and drift to the moderator surfaces through the influence of the electric fields produced by the electrodes. Positrons may be emitted from the surfaces of the moderator material and may be confined by orthogonal electric and magnetic fields while they drift out from the vacuum gap between cathodes and anodes for extraction.