Production manner of the transmitted die moderator for low-speed positron brightness reinforcement, the transmitted die moderator for low-speed positron brightness reinforcement, brightness reinforcement manner of the low-speed positron beam, the high brightness low-speed positron beam generator and positron microscope

摘要

PROBLEM TO BE SOLVED: To provide a moderator made of a nickel thin film of a positron brightness enhancement transmission type capable of generating re-discharge positrons with high efficiency higher than 20%.;SOLUTION: (1) A nickel thin film having the thickness of 100-200 nm is heat-treated in a hydrogen gas atmosphere in a range of 700C-800C, and (2) the surface of the nickel thin film is cleaned by making an impact on the heat-treated nickel thin film with hydrogen atoms and/or hydrogen ions generated by subjecting hydrogen gas to electron impact in the hydrogen gas atmosphere wherein a hydrogen gas pressure is higher than 0.001333 Pa (10^-5 Torr) and below 0.013332 Pa (10^-4 Torr).;COPYRIGHT: (C)2009,JPO&INPIT