Collective Effects in a Diffraction Limited Storage Ring
Abstract
Our paper gives an overview of collective effects that are likely to appear and possibly limit the performance in a diffraction-limited storage ring (DLSR) that stores a high-intensity ultra-low-emittance beam. Beam instabilities and other intensity-dependent effects that may significantly impact the machine performance are covered. The latter include beam-induced machine heating, Touschek scattering, intra-beam scattering, as well as incoherent tune shifts. The general trend that the efforts to achieve ultra-low emittance result in increasing the machine coupling impedance and the beam sensitivity to instability is reviewed. The nature of coupling impedance in a DLSR is described, followed by a series of potentially dangerous beam instabilities driven by the former, such as resistive-wall, TMCI (transverse mode coupling instability), head-tail and microwave instabilities. Additionally, beam-ion and CSR (coherent synchrotron radiation) instabilities are also treated. Means to fight against collective effects such as lengthening of the bunch with passive harmonic cavities and bunch-by-bunch transverse feedback are introduced. Numerical codes developed and used to evaluate the machine coupling impedance, as well as to simulate beam instability using the former as inputs are described.
- Authors:
-
- Synchrotron SOLEIL, Saint-Aubin (France)
- SLAC National Accelerator Lab., Standford, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1224072
- Report Number(s):
- SLAC-PUB-16406
Journal ID: ISSN 1600-5775
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Synchrotron Radiation (Online)
- Additional Journal Information:
- Journal Name: Journal of Synchrotron Radiation (Online); Journal Volume: 21; Journal ID: ISSN 1600-5775
- Publisher:
- International Union of Crystallography
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; diffraction-limited storage ring; beam instability; collective effects; wake function; impedance; low emittance; light source
Citation Formats
Nagaoka, Ryutaro, and Bane, Karl L.F. Collective Effects in a Diffraction Limited Storage Ring. United States: N. p., 2015.
Web. doi:10.1107/S1600577514015215.
Nagaoka, Ryutaro, & Bane, Karl L.F. Collective Effects in a Diffraction Limited Storage Ring. United States. https://doi.org/10.1107/S1600577514015215
Nagaoka, Ryutaro, and Bane, Karl L.F. Tue .
"Collective Effects in a Diffraction Limited Storage Ring". United States. https://doi.org/10.1107/S1600577514015215. https://www.osti.gov/servlets/purl/1224072.
@article{osti_1224072,
title = {Collective Effects in a Diffraction Limited Storage Ring},
author = {Nagaoka, Ryutaro and Bane, Karl L.F.},
abstractNote = {Our paper gives an overview of collective effects that are likely to appear and possibly limit the performance in a diffraction-limited storage ring (DLSR) that stores a high-intensity ultra-low-emittance beam. Beam instabilities and other intensity-dependent effects that may significantly impact the machine performance are covered. The latter include beam-induced machine heating, Touschek scattering, intra-beam scattering, as well as incoherent tune shifts. The general trend that the efforts to achieve ultra-low emittance result in increasing the machine coupling impedance and the beam sensitivity to instability is reviewed. The nature of coupling impedance in a DLSR is described, followed by a series of potentially dangerous beam instabilities driven by the former, such as resistive-wall, TMCI (transverse mode coupling instability), head-tail and microwave instabilities. Additionally, beam-ion and CSR (coherent synchrotron radiation) instabilities are also treated. Means to fight against collective effects such as lengthening of the bunch with passive harmonic cavities and bunch-by-bunch transverse feedback are introduced. Numerical codes developed and used to evaluate the machine coupling impedance, as well as to simulate beam instability using the former as inputs are described.},
doi = {10.1107/S1600577514015215},
journal = {Journal of Synchrotron Radiation (Online)},
number = ,
volume = 21,
place = {United States},
year = {Tue Oct 20 00:00:00 EDT 2015},
month = {Tue Oct 20 00:00:00 EDT 2015}
}
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