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. 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.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1366520
- Alternate Identifier(s):
- OSTI ID: 1395201
- Report Number(s):
- FERMILAB-PUB-17-206-AD-APC; arXiv:1706.08477
Journal ID: ISSN 0031-9007; PRLTAO; 1607614
- Grant/Contract Number:
- AC02-07CH11359
- Resource 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)
- 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. doi:10.1103/PhysRevLett.119.134802.
Shiltsev, V., Alexahin, Yuri, Burov, A., & Valishev, A. Landau Damping of Beam Instabilities by Electron Lenses. United States. https://doi.org/10.1103/PhysRevLett.119.134802
Shiltsev, V., Alexahin, Yuri, Burov, A., and Valishev, A. Wed .
"Landau Damping of Beam Instabilities by Electron Lenses". United States. https://doi.org/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 = {Wed Sep 27 00:00:00 EDT 2017},
month = {Wed Sep 27 00:00:00 EDT 2017}
}
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