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Title: Effect of RF Parameters on Breakdown Limits in High-Vacuum X-Band Structures

Abstract

RF breakdown is one of the major factors determining performance of high power rf components and rf sources. RF breakdown limits working power and produces irreversible surface damage. The breakdown limit depends on the rf circuit, structure geometry, and rf frequency. It is also a function of the input power, pulse width, and surface electric and magnetic fields. In this paper we discuss multi-megawatt operation of X-band rf structures at pulse width on the order of one microsecond. These structures are used in rf systems of high gradient accelerators. Recent experiments at Stanford Linear Accelerator Center (SLAC) have explored the functional dependence of breakdown limit on input power and pulse width. The experimental data covered accelerating structures and waveguides. Another breakdown limit of accelerating structures was associated with high magnetic fields found in waveguide-to-structure couplers. To understand and quantify these limits we simulated 3D structures with the electrodynamics code Ansoft HFSS and the Particle-In-Cell code MAGIC3D. Results of these simulations together with experimental data will be discussed in this paper.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Science (US)
OSTI Identifier:
815741
Report Number(s):
SLAC-PUB-10175
TRN: US0304781
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 22 Sep 2003
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; BREAKDOWN; ELECTRODYNAMICS; FUNCTIONALS; GEOMETRY; MAGNETIC FIELDS; PERFORMANCE; RF SYSTEMS; STANFORD LINEAR ACCELERATOR CENTER; WAVEGUIDES

Citation Formats

Dolgashev, Valery A. Effect of RF Parameters on Breakdown Limits in High-Vacuum X-Band Structures. United States: N. p., 2003. Web. doi:10.2172/815741.
Dolgashev, Valery A. Effect of RF Parameters on Breakdown Limits in High-Vacuum X-Band Structures. United States. https://doi.org/10.2172/815741
Dolgashev, Valery A. Mon . "Effect of RF Parameters on Breakdown Limits in High-Vacuum X-Band Structures". United States. https://doi.org/10.2172/815741. https://www.osti.gov/servlets/purl/815741.
@article{osti_815741,
title = {Effect of RF Parameters on Breakdown Limits in High-Vacuum X-Band Structures},
author = {Dolgashev, Valery A},
abstractNote = {RF breakdown is one of the major factors determining performance of high power rf components and rf sources. RF breakdown limits working power and produces irreversible surface damage. The breakdown limit depends on the rf circuit, structure geometry, and rf frequency. It is also a function of the input power, pulse width, and surface electric and magnetic fields. In this paper we discuss multi-megawatt operation of X-band rf structures at pulse width on the order of one microsecond. These structures are used in rf systems of high gradient accelerators. Recent experiments at Stanford Linear Accelerator Center (SLAC) have explored the functional dependence of breakdown limit on input power and pulse width. The experimental data covered accelerating structures and waveguides. Another breakdown limit of accelerating structures was associated with high magnetic fields found in waveguide-to-structure couplers. To understand and quantify these limits we simulated 3D structures with the electrodynamics code Ansoft HFSS and the Particle-In-Cell code MAGIC3D. Results of these simulations together with experimental data will be discussed in this paper.},
doi = {10.2172/815741},
url = {https://www.osti.gov/biblio/815741}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {9}
}