SR irradiation experiments on NEG coatings with thinner thickness or under cryogenic temperature for application to future accelerators

Abstract

In future high-brightness synchrotron radiation (SR) sources where very narrow beam pipes will be required and in high-luminosity hadron colliders where beam pipes will be installed inside superconducting magnets, the fundamental properties of non-evaporable getter (NEG) coatings, namely, high effective pumping speeds, low photon stimulated desorption (PSD) yields, and low total electron yields, are expected to be efficiently exploited. In expectation of application to such advanced accelerators, we have measured the PSD and photoelectron emission properties of the NEG coatings with 150 nm thickness or at cryogenic temperature of 77 K on a dedicated SR beamline at KEK-PF.