Secondary electron yield of a thin film coating on the APS rf cavity tuners

Author

Walters, D.R. ; Ma, Q.

Author_Institution

Adv. Photon Source, Argonne Nat. Lab., IL, USA

Volume

3

fYear

2001

fDate

2001

Firstpage

2153

Abstract

A thin film coating of titanium nitride was applied to the surface of rf cavity tuners to reduce secondary electron generated when the existing copper base material is in place. The tuners are used in high-field gradients, where electron heating of the tuner is a problem. By reducing the generation of electrons the temperature of the tuners will be reduced, for better reliability. This paper compares characteristics useful for rf cavity tuners, such as surface composition and secondary electron yield, for copper, titanium-coated copper, and titanium-nitride-coated copper. The process and the setup of equipment used to apply the coatings are summarized

Keywords

accelerator RF systems; accelerator cavities; beam handling equipment; copper; electron accelerators; linear accelerators; protective coatings; thin films; titanium compounds; APS radiofrequency cavity tuners; Cu; TiN; copper base material; electron heating; high-field gradients; secondary electron yield; surface composition; thin film coating; titanium nitride; titanium-coated copper; titanium-nitride-coated copper; Coatings; Copper; Electrons; Heating; Radio frequency; Temperature; Tin; Titanium; Transistors; Tuners;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001

Conference_Location

Chicago, IL

Print_ISBN

0-7803-7191-7

Type

conf

DOI

10.1109/PAC.2001.987307

Filename

987307