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Title: Enhanced Method for Cavity Impedance Calculations

Abstract

With the proposal of medium to high average current accelerator facilities the demand for cavities with extremely low Higher Order Mode (HOM) impedances is increasing. Modern numerical tools are still under development to more thoroughly predict impedances that need to take into account complex absorbing boundaries and lossy materials. With the usually large problem size it is preferable to utilize massive parallel computing when applicable and available. Apart from such computational issues, we have developed methods using available computer resources to enhance the information that can be extracted from a cavities? wakefield computed in time domain. In particular this is helpful for a careful assessment of the extracted RF power and the mitigation of potential beam break-up or emittance diluting effects, a figure of merit for the cavity performance. The method is described as well as an example of its implementation.

Authors:
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1021852
Report Number(s):
JLAB-ACC-09-982; DOE/OR/23177-0729
TRN: US1104068
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Conference: PAC09, 4-8 May 2009, Vancouver, BC, Canada
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATOR FACILITIES; CAVITIES; COMPUTERS; IMPEDANCE; IMPLEMENTATION; MITIGATION; PERFORMANCE

Citation Formats

Frank Marhauser, Robert Rimmer, Kai Tian, Haipeng Wang. Enhanced Method for Cavity Impedance Calculations. United States: N. p., 2009. Web.
Frank Marhauser, Robert Rimmer, Kai Tian, Haipeng Wang. Enhanced Method for Cavity Impedance Calculations. United States.
Frank Marhauser, Robert Rimmer, Kai Tian, Haipeng Wang. Fri . "Enhanced Method for Cavity Impedance Calculations". United States. https://www.osti.gov/servlets/purl/1021852.
@article{osti_1021852,
title = {Enhanced Method for Cavity Impedance Calculations},
author = {Frank Marhauser, Robert Rimmer, Kai Tian, Haipeng Wang},
abstractNote = {With the proposal of medium to high average current accelerator facilities the demand for cavities with extremely low Higher Order Mode (HOM) impedances is increasing. Modern numerical tools are still under development to more thoroughly predict impedances that need to take into account complex absorbing boundaries and lossy materials. With the usually large problem size it is preferable to utilize massive parallel computing when applicable and available. Apart from such computational issues, we have developed methods using available computer resources to enhance the information that can be extracted from a cavities? wakefield computed in time domain. In particular this is helpful for a careful assessment of the extracted RF power and the mitigation of potential beam break-up or emittance diluting effects, a figure of merit for the cavity performance. The method is described as well as an example of its implementation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {5}
}

Conference:
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