Landau Damping of Beam Instabilities by Electron Lenses
Abstract
Modern and future particle accelerators employ increasingly higher intensity and brighter beams of charged particles and become operationally limited by coherent beam instabilities. Usual methods to control the instabilities, such as octupole magnets, beam feedback dampers and use of chromatic effects, become less effective and insufficient. We show that, in contrast, Lorentz forces of a lowenergy, a magnetically stabilized electron beam, or "electron lens", easily introduces transverse nonlinear focusing sufficient for Landau damping of transverse beam instabilities in accelerators. It is also important that, unlike other nonlinear elements, the electron lens provides the frequency spread mainly at the beam core, thus allowing much higher frequency spread without lifetime degradation. For the parameters of the Future Circular Collider, a single conventional electron lens a few meters long would provide stabilization superior to tens of thousands of superconducting octupole magnets.
 Authors:
 Fermilab
 Publication Date:
 Research Org.:
 Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), High Energy Physics (HEP) (SC25)
 OSTI Identifier:
 1366520
 Report Number(s):
 arXiv:1706.08477; FERMILABPUB17206ADAPC
1607614
 DOE Contract Number:
 AC0207CH11359
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: PRL
 Country of Publication:
 United States
 Language:
 English
 Subject:
 43 PARTICLE ACCELERATORS
Citation Formats
Shiltsev, V., Alexahin, Yuri, Burov, A., and Valishev, A. Landau Damping of Beam Instabilities by Electron Lenses. United States: N. p., 2017.
Web.
Shiltsev, V., Alexahin, Yuri, Burov, A., & Valishev, A. Landau Damping of Beam Instabilities by Electron Lenses. United States.
Shiltsev, V., Alexahin, Yuri, Burov, A., and Valishev, A. 2017.
"Landau Damping of Beam Instabilities by Electron Lenses". United States.
doi:. https://www.osti.gov/servlets/purl/1366520.
@article{osti_1366520,
title = {Landau Damping of Beam Instabilities by Electron Lenses},
author = {Shiltsev, V. and Alexahin, Yuri and Burov, A. and Valishev, A.},
abstractNote = {Modern and future particle accelerators employ increasingly higher intensity and brighter beams of charged particles and become operationally limited by coherent beam instabilities. Usual methods to control the instabilities, such as octupole magnets, beam feedback dampers and use of chromatic effects, become less effective and insufficient. We show that, in contrast, Lorentz forces of a lowenergy, a magnetically stabilized electron beam, or "electron lens", easily introduces transverse nonlinear focusing sufficient for Landau damping of transverse beam instabilities in accelerators. It is also important that, unlike other nonlinear elements, the electron lens provides the frequency spread mainly at the beam core, thus allowing much higher frequency spread without lifetime degradation. For the parameters of the Future Circular Collider, a single conventional electron lens a few meters long would provide stabilization superior to tens of thousands of superconducting octupole magnets.},
doi = {},
journal = {PRL},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 6
}

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