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Title: COMPARISON OF RF CAVITY TRANSPORT MODELS FOR BBU SIMULATIONS

Abstract

The transverse focusing effect in RF cavities plays a considerable role in beam dynamics for low-energy beamline sections and can contribute to beam breakup (BBU) instability. The purpose of this analysis is to examine RF cavity models in simulation codes which will be used for BBU experiments at Jefferson Lab and improve BBU simulation results. We review two RF cavity models in the simulation codes elegant and TDBBU (a BBU simulation code developed at Jefferson Lab). elegant can include the Rosenzweig-Serafini (R-S) model for the RF focusing effect. Whereas TDBBU uses a model from the code TRANSPORT which considers the adiabatic damping effect, but not the RF focusing effect. Quantitative comparisons are discussed for the CEBAF beamline. We also compare the R-S model with the results from numerical simulations for a CEBAF-type 5-cell superconducting cavity to validate the use of the R-S model as an improved low-energy RF cavity transport model in TDBBU. We have implemented the R-S model in TDBBU. It will improve BBU simulation results to be more matched with analytic calculations and experimental results.

Authors:
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1020749
Report Number(s):
JLAB-ACP-11-1339; DOE/OR/23177-1517
TRN: US1103781
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Conference: PAC 2011, New York, NY, 28 Mar - 1 Apr 2011
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; BEAM DYNAMICS; CAVITY RESONATORS; DAMPING; FOCUSING; INSTABILITY; RF SYSTEMS; SIMULATION; TRANSPORT

Citation Formats

Ilkyoung Shin,Byung Yunn,Todd Satogata,Shahid Ahmed. COMPARISON OF RF CAVITY TRANSPORT MODELS FOR BBU SIMULATIONS. United States: N. p., 2011. Web.
Ilkyoung Shin,Byung Yunn,Todd Satogata,Shahid Ahmed. COMPARISON OF RF CAVITY TRANSPORT MODELS FOR BBU SIMULATIONS. United States.
Ilkyoung Shin,Byung Yunn,Todd Satogata,Shahid Ahmed. Tue . "COMPARISON OF RF CAVITY TRANSPORT MODELS FOR BBU SIMULATIONS". United States. doi:. https://www.osti.gov/servlets/purl/1020749.
@article{osti_1020749,
title = {COMPARISON OF RF CAVITY TRANSPORT MODELS FOR BBU SIMULATIONS},
author = {Ilkyoung Shin,Byung Yunn,Todd Satogata,Shahid Ahmed},
abstractNote = {The transverse focusing effect in RF cavities plays a considerable role in beam dynamics for low-energy beamline sections and can contribute to beam breakup (BBU) instability. The purpose of this analysis is to examine RF cavity models in simulation codes which will be used for BBU experiments at Jefferson Lab and improve BBU simulation results. We review two RF cavity models in the simulation codes elegant and TDBBU (a BBU simulation code developed at Jefferson Lab). elegant can include the Rosenzweig-Serafini (R-S) model for the RF focusing effect. Whereas TDBBU uses a model from the code TRANSPORT which considers the adiabatic damping effect, but not the RF focusing effect. Quantitative comparisons are discussed for the CEBAF beamline. We also compare the R-S model with the results from numerical simulations for a CEBAF-type 5-cell superconducting cavity to validate the use of the R-S model as an improved low-energy RF cavity transport model in TDBBU. We have implemented the R-S model in TDBBU. It will improve BBU simulation results to be more matched with analytic calculations and experimental results.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 2011},
month = {Tue Mar 01 00:00:00 EST 2011}
}

Conference:
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