MANUFACTURING METHOD OF TRANSMISSION TYPE MODERATOR FOR SLOW POSITRON BRIGHTNESS ENHANCEMENT, TRANSMISSION TYPE MODERATOR FOR SLOW POSITRON BRIGHTNESS ENHANCEMENT, BRIGHTNESS ENHANCEMENT METHOD OF SLOW POSITRON BEAM, HIGH BRIGHTNESS SLOW POSITRON BEAM GENERATION DEVICE, 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