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Title: Impact of the Wiggler Coherent Synchrotron Radiation Impedance on the Beam Instability

Abstract

Coherent Synchrotron Radiation (CSR) can play an important role by not only increasing the energy spread and emittance of a beam, but also leading to a potential instability. Previous studies of the CSR induced longitudinal instability were carried out for the CSR impedance due to dipole magnets. However, many storage rings include long wigglers where a large fraction of the synchrotron radiation is emitted. This includes high-luminosity factories such as DAPHNE, PEP-II, KEK-B, and CESR-C as well as the damping rings of future linear colliders. In this paper, the instability due to the CSR impedance from a wiggler is studied assuming a large wiggler parameter K. The primary consideration is a low frequency microwave-like instability, which arises near the pipe cut-off frequency. Detailed results are presented on the growth rate and threshold for the damping rings of several linear collider designs. Finally, the optimization of the relative fraction of damping due to the wiggler systems is discussed for the damping rings.

Authors:
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (US)
OSTI Identifier:
813032
Report Number(s):
SLAC-PUB-9629
TRN: US0303611
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 27 May 2003
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; DAMPING; DIPOLES; IMPEDANCE; INSTABILITY; LINEAR COLLIDERS; MAGNETS; OPTIMIZATION; STORAGE RINGS; SYNCHROTRON RADIATION

Citation Formats

Wu, Juhao. Impact of the Wiggler Coherent Synchrotron Radiation Impedance on the Beam Instability. United States: N. p., 2003. Web. doi:10.2172/813032.
Wu, Juhao. Impact of the Wiggler Coherent Synchrotron Radiation Impedance on the Beam Instability. United States. https://doi.org/10.2172/813032
Wu, Juhao. 2003. "Impact of the Wiggler Coherent Synchrotron Radiation Impedance on the Beam Instability". United States. https://doi.org/10.2172/813032. https://www.osti.gov/servlets/purl/813032.
@article{osti_813032,
title = {Impact of the Wiggler Coherent Synchrotron Radiation Impedance on the Beam Instability},
author = {Wu, Juhao},
abstractNote = {Coherent Synchrotron Radiation (CSR) can play an important role by not only increasing the energy spread and emittance of a beam, but also leading to a potential instability. Previous studies of the CSR induced longitudinal instability were carried out for the CSR impedance due to dipole magnets. However, many storage rings include long wigglers where a large fraction of the synchrotron radiation is emitted. This includes high-luminosity factories such as DAPHNE, PEP-II, KEK-B, and CESR-C as well as the damping rings of future linear colliders. In this paper, the instability due to the CSR impedance from a wiggler is studied assuming a large wiggler parameter K. The primary consideration is a low frequency microwave-like instability, which arises near the pipe cut-off frequency. Detailed results are presented on the growth rate and threshold for the damping rings of several linear collider designs. Finally, the optimization of the relative fraction of damping due to the wiggler systems is discussed for the damping rings.},
doi = {10.2172/813032},
url = {https://www.osti.gov/biblio/813032}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 27 00:00:00 EDT 2003},
month = {Tue May 27 00:00:00 EDT 2003}
}