Use of acoustic emission to diagnose breakdown in accelerator RF structures

Author

Nelson, J. ; Ross, M. ; Frisch, J. ; Le Pimpec, E. ; Jobe, K. ; McCormick, D. ; Smith, T.

Author_Institution

Stanford Linear Accelerator Center, Menlo Park, CA, USA

Volume

2

fYear

2003

fDate

12-16 May 2003

Firstpage

1279

Abstract

Accelerator structures of a wide variety have been damaged by RF breakdowns. Very little is known about the mechanisms that cause the breakdown and the damage although there has been theoretical work. Using an array of ultrasonic acoustic emission sensors we have been able to locate and classify breakdown events more accurately than possible using microwave techniques. Data from the technique has led to improvements in the design of the NLC X-band RF structure. We report results of acoustic emission studies at the DESY TESLA Test Facility and the SLAC NLC Test Accelerator.

Keywords

accelerator RF systems; acoustic emission testing; beam handling equipment; electric breakdown; particle beam diagnostics; particle beam dynamics; NLC X-band RF structure; RF breakdowns; accelerator RF structures; acoustic emission; microwave techniques; ultrasonic acoustic emission sensors; Acoustic arrays; Acoustic emission; Acoustic sensors; Electric breakdown; Microwave antenna arrays; Microwave sensors; Microwave theory and techniques; Radio frequency; Sensor arrays; Test facilities;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1289678

Filename

1289678