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Title: Landau Damping of Beam Instabilities by Electron Lenses

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. Here, we show that, in contrast, Lorentz forces of a low-energy, magnetically stabilized electron beam, or “electron lens,” easily introduce transverse nonlinear focusing sufficient for Landau damping of transverse beam instabilities in accelerators. It is also important to note 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:
ORCiD logo [1] ;  [1] ;  [1] ;  [1]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Report Number(s):
FERMILAB-PUB-17-206-AD-APC; arXiv:1706.08477
Journal ID: ISSN 0031-9007; PRLTAO; 1607614
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 13; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS
OSTI Identifier:
1366520
Alternate Identifier(s):
OSTI ID: 1395201

Shiltsev, V., Alexahin, Yuri, Burov, A., and Valishev, A.. Landau Damping of Beam Instabilities by Electron Lenses. United States: N. p., Web. doi:10.1103/PhysRevLett.119.134802.
Shiltsev, V., Alexahin, Yuri, Burov, A., & Valishev, A.. Landau Damping of Beam Instabilities by Electron Lenses. United States. doi:10.1103/PhysRevLett.119.134802.
Shiltsev, V., Alexahin, Yuri, Burov, A., and Valishev, A.. 2017. "Landau Damping of Beam Instabilities by Electron Lenses". United States. doi:10.1103/PhysRevLett.119.134802. 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. Here, we show that, in contrast, Lorentz forces of a low-energy, magnetically stabilized electron beam, or “electron lens,” easily introduce transverse nonlinear focusing sufficient for Landau damping of transverse beam instabilities in accelerators. It is also important to note 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 = {10.1103/PhysRevLett.119.134802},
journal = {Physical Review Letters},
number = 13,
volume = 119,
place = {United States},
year = {2017},
month = {9}
}