公开(公告)号：GB2527291A

公开(公告)日：2015-12-23

申请号：GB201410593

申请日：2014-06-13

Applicant: STFC SCIENCE & TECHNOLOGY

Inventor： VALIZADEH REZA ,  MALYSHEV OLEG

IPC: B23K26/36 ,  B23K26/00

Abstract: A method of reducing the photoelectron yield (PEY) and/or the secondary electron yield (SEY) of at least part of an apparatus, the method comprising the steps of providing an apparatus, and ablating material from a metal surface of the apparatus using a pulsed laser to produce an array of periodic structures in the metal surface and thereby reducing the PEY and/or SEY of the metal surface. The apparatus is shown to be a vacuum chamber, a particle accelerator, a radio frequency waveguide, a detector and a spacecraft. Also shown is a method performed in the presence of a reactive gas such that the metal surface is caused to react with the reactive gas.