Sergei Nagaitsev

Head of Accelerator Science Programs, Fermilab

Professor (Part Time), Department of Physics and Enrico Fermi Institute, The University of Chicago

Research Interests

Nonlinear Beam Dynamics (experimental and theoretical)

Beam Cooling

Advanced Accelerator Concepts

AI/ML in beam physics

Search for ultralight dark matter

Tests of quantum mechanics in new regimes

Gravitational wave detection

Research facilities: (FAST/IOTA, FACET-II, MAGIS-100)

Short Biography

Education and Training

Postdoctoral Appointment, 1995 - 1998, Fermilab

PhD Accelerator Physics, 1995, Indiana University, Bloomington

BS Physics, 1989, Novosibirsk University, Novosibirsk, Russia


Professional Experience

2018 - present      Head of Accelerator Science Programs, Fermilab - Office of Accelerator Science

2015 - present      Professor Part-time, The University of Chicago - Accelerator Physics

2013 - 2018      Chief Accelerator Officer, Fermilab -  Accelerator Division


UChicago Phys 410 (Autumn 2021) Beam Dynamics in Accelerators

UChicago PHYS 122 (Winter 2020) General Physics II

UChicago PHYS 209 (Autumn 2018) Fundamentals of Accelerator Physics and Technology

USPAS 2019W, Integrable Particle Dynamics in Accelerators

USPAS 2017W, Integrable Particle Dynamics in Accelerators

Committees and Honors


2022: Snowmass Steering Group

2020: Chair of the Division of Physics of Beams (APS)

2015: Dieter Moehl Medal (sponsored by CERN)

2014: Chair, APS Robert R. Wilson Prize committee

2009: Chair, USPAS Prize Committee

2007: US Particle Accelerator School Prize for Achievement in Accelerator Physics and Technology

2006: APS Fellow (Division of Physics of Beams)

1998 - 2001: Wilson Fellow, Fermilab


Erdős number


4 (Babai-Gorodezky-K.-J. Kim-SN)


Graduate Students


2005: S. Seletskiy (U. Rochester)

Attainment of Electron Beam Suitable for Medium Energy Electron Cooling


2017: S. Antipov (U. Chicago)

Fast Transverse Beam Instability Caused by Electron Cloud Trapped in Combined Function Magnets


2021: I. Lobach (U. Chicago)

Statistical Properties of Undulator Radiation: Classical and Quantum Effects


WiDAQ project





I. Lobach, S. Nagaitsev, A. Romanov, and G. Stancari, Single electron in a storage ring: a probe into the fundamental properties of synchrotron radiation and a powerful diagnostic tool, 2022 JINST 17 P02014

I. Lobach, A. Halavanau, Z. Huang, K. Kim, S. Nagaitsev, A.L. Romanov, G. Stancari, and A. Valishev, Observation of Undulator Radiation Generated by a Single Electron Circulating in a Storage Ring and Possible Applications, Proceedings IPAC21

C. Mitchell, R. Ryne, K. Hwang, S. Nagaitsev, and T. Zolkin, Extracting Dynamical Frequencies from Invariants of Motion in Finite-Dimensional Nonlinear Integrable Systems, Phys. Rev. E 103, 062216 (2021)

S. Nagaitsev, I. Lobach, E. Stern and T. Zolkin, McMillan electron lens in a system with space charge, 2021 JINST 16 P03047

I. Lobach, S. Nagaitsev, V. Lebedev, A. Romanov, G. Stancari, A. Valishev, A. Halavanau, Z. Huang, and K.-J. Kim, Transverse Beam Emittance Measurement by Undulator Radiation Power Noise, Phys. Rev. Lett. 126, 134802 (2021)

I. Lobach, S. Nagaitsev, V. Lebedev, A. Romanov, G. Stancari, A. Valishev, A. Halavanau, Z. Huang, and K.-J. Kim, Measurements of undulator radiation power noise and comparison with ab initio calculations, Phys. Rev. Accel. Beams 24, 040701 (2021)

Accelerator and Beam Physics Research Goals and Opportunities,

I. Lobach, V. Lebedev, S. Nagaitsev, A. Romanov, G. Stancari, A. Valishev, A. Halavanau, Z. Huang, and K.-J. Kim, Statistical properties of spontaneous synchrotron radiation with arbitrary degree of coherence, Phys. Rev. Accel. Beams 23, 090703 (2020)

S. Nagaitsev and T. Zolkin, Betatron frequency and the Poincare rotation number, Phys. Rev. Accel. Beams 23, 054001 (2020)

E. Angelico, J. Eisch, A. Elagin, H. Frisch, S. Nagaitsev, and M. Wetstein, Energy and Flavor Discrimination Using Precision Time Structure in On-Axis Neutrino Beams, Phys. Rev. D 100, 032008 (2019).

S. Nagaitsev and V. Lebedev, A Cost-Effective Rapid-Cycling Synchrotron, Reviews of Accelerator Science and Technology, Vol. 10 (2018) 1-22, World Scientific Publishing Company, DOI: 10.1142/S1793626818001450

V. Lebedev, A. Burov, and S. Nagaitsev, Efficiency versus instability in plasma accelerators, Phys. Rev. Accel. Beams 20, 121301 (2017).

S.A. Antipov, P. Adamson, A. Burov, S. Nagaitsev, and M.-J. Yang, Fast instability caused by electron cloud in combined function magnets, Phys. Rev. Accel. Beams 20, 044401 (2017).

S.A. Antipov, S. Nagaitsev and A. Valishev, Single-particle dynamics in a nonlinear accelerator lattice: attaining a large tune spread with octupoles in IOTA, Journal of Instrumentation, Volume 12, April 2017.

S.A. Antipov et al., IOTA (Integrable Optics Test Accelerator): facility and experimental beam physics program, Journal of Instrumentation, Volume 12, March 2017.

S. Webb, D. Bruhwiler, A. Valishev, S. Nagaitsev, and V. Danilov, "Chromatic and Dispersive Effects in Nonlinear Integrable Optics", arXiv:1504.05981

S. A. Antipov, S. Nagaitsev, A. Valishev, "Quasi-Integrable Nonlinear Optics Experiment at IOTA", arXiv:1502.01688

S. Nagaitsev, L. Prost and A. Shemyakin, "Fermilab 4.3-MeV electron cooler," 2015 JINST 10 T01001.

V. Danilov and S. Nagaitsev, "Accelerator-feasible N-body nonlinear integrable system", Phys. Rev. ST Accel. Beams 17, 124402 (2014).

V. Danilov and S. Nagaitsev, "Nonlinear accelerator lattices with one and two analytic invariants", Phys. Rev. ST Accel. Beams 13, 084002 (2010)

S. Nagaitsev, D. Broemmelsiek, A. Burov, K. Carlson, C. Gattuso, M. Hu, T. Kroc, L. Prost, S. Pruss, M. Sutherland, C. W. Schmidt, A. Shemyakin, V. Tupikov, A. Warner, G. Kazakevich, and S. Seletskiy, "Experimental Demonstration of Relativistic Electron Cooling", Phys. Rev. Lett. 96, 044801 (2006)

A. Burov, S. Nagaitsev, and Ya. Derbenev, "Circular modes, beam adapters, and their applications in beam optics", Phys. Rev. E 66, 016503 (2002)

T. Ellison, S. Nagaitsev, M. Ball, D. Caussyn, M. Ellison, and B. Hamilton, "Attainment of space-charge dominated beams in a synchrotron", Phys. Rev. Lett. 70, 790 (1993)

I. N. Meshkov, S. S. Nagaitsev, and E. M. Syresin, "Beam-plasma discharge stimulated by electrostatic barriers", Dokl. Akad. Nauk SSSR, 314:5 (1990), 1119-1121 (see link)


Contact Information

Sergei Nagaitsev
Fermilab MS306
Batavia, IL 60510
630-840-4552 - Fax
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Page Last Modified: Feb 21, 2022