Center for Advanced Studies of Accelerators

 CASA Staff


derbenev Yaroslav S. Derbenev

Accelerator Physics


  • Center for Advanced Studies of Accelerators
    Thomas Jefferson National Accelerator Facility
    12000 Jefferson Avenue, Newport News, VA 23606
  • 757-269-5051 (phone)
    757-269-5024 (fax)


  • M.S., Moscow State University, 1963
  • Soviet Candidate Degree, Institute of Nuclear Physics, Novosibirsk, 1968
  • Soviet Doctoral Degree, Institute of Nuclear Physics, Novosibirsk, 1978
    Doctoral Thesis "Theory of Electron Cooling"


  • Staff Secientist, JLab, 2001
  • Visiting Research Scientist and Adjunct Professor, Physics Dept., University of Michigan, 1990 - 2001
  • Chief Scientist, Accelerator Physics and Laser Technology Group, Institute of Complete Electric Drive, Novosibirsk, Russia, 1986-1990
  • Chief Scientist, Institute of Physics, Atomic Energy Committee, Yerevan, USSR, 1985-1986
  • Chief Scientist, Accelerator Theory Group, Institute of Nuclear Physics, Novosibirsk, Russia, 1979-1985
  • Chief Scientist, Institute of Nuclear Physics, Novosibirsk, Russia, 1969-1978
  • Junior Scientist, Theoretical laboratory of the Institute of Nuclear Physics, Novosibirsk,Russia, 1963-1968


  • Fellow, American Physical Society, 1992

Research Highlights:

  • Beam optics
    1. Circular betatron modes and plane-vortex beam transformations using Beam Adapters (invented in 1993-1997, ref. ). Application areas: colliding beams, electron cooling, linear colliders, hard radiation sources, bunch compressors, transport of intense beams, applied use. (ref. ).
    2. Transport of canonical angular momentum dominated (CAM) beams with discontinuous solenoid (invented in 1996-1998 in collaboration with S.Nagaitsev, A Shemyakin, and A.Burov, ref. ).
    3. Advanced concepts for electron circulator and storage rings (ref. ). Applications: electron injectors with magnetized gun, electron cooling (ref. ), ionization cooling of muon beams (ref. ), transport of intense beams.

  • Non-linear beam dynamics
    1. The non-linear resonances of beam-beam interaction in colliders (ref. )..
    2. Flat to round colliding beams (proposed in 2000, ref. )
    3. Compensation for beam longitudinal slippage divergence:
      • RF quadrupole method (ref. ), application: X-ray FEL (ref. )
      • achromatic optics method (ref. ), application: RF-capture for muon beams (ref. )
    4. Compensation for nonlinear aberrations and space charge effect on emittance at transport of CAM beams (proposed in 1999, ref. )
    5. Annular beams in phase space and in ordinary space. Annular CAM (ACAM) beams. Concentration of annular beams and reverse transitions (invented in 1993-1998). Applications: electron injectors of intense high brightness beams; transport of intense beams, Stern-Gerlach polarization of antiproton beams in storage ring (ref. ).

  • Collective beam dynamics
    1. Instabilities of bunched beams in storage rings (ref. )
    2. Instability of compensated colliding beams (ref. )
    3. Linear electron beam as a microwave amplifier (ref. )

  • Beam cooling
    1. Theory of electron cooling (ref. )
    2. High energy electron cooling (ref. )
    3. Theory of stochastic cooling (ref. )
    4. Microwave electron-stochastic cooling (proposed in 1980, ref. …)
    5. Electron cooling of positron beams in solenoid field (proposed in 1983, ref. )
    6. 3-dimensional ionization cooling of muon beam in a helical transport (ref. ).

  • Polarized beams in accelerators and storage rings
    1. Spin dynamics of circulating beams at an arbitrary closed orbit (ref. )
    2. “Siberian Snakes” and spin rotators for polarization maintenance and manipulation at acceleration and experiments (invented in collaboration with A.Kondratenko, 1974-1977, ref. )
    3. Cancellation of quadrupole effect on spin in high energy accelerators (“spin quads”, invented in 1990 in collaboration with A.Chao, ref. )
    4. Theory of radiative polarization for electrons and positrons in storage rings (ref. ).
    5. Electron and positron polarization in storage rings using laser beams (proposed in 1978, ref. )
    6. RF polarimetry for circulating beams using a superconducting cavity (proposed in1993, ref. )
    7. Stern-Gerlach polarization of antiproton beams in storage rings (since 1990, ref. )

  • Acceleration of charged particle beams
    1. A novel two beam accelerator (invented in collaboration with R.Gilgenbach and Y.Y.Lau, 1994 patent, ref. ).

  • Microwave radiation of relativistic electron beams
    1. Theory and proposal of undulator-based X-ray FEL using the self-amplified spontaneous emission (SASE) mechanism (with A.Kondratenko and E.Saldin, ref. )
    2. Coherent synchrotron radiation (CSR) of electron beams in compressors ( ref. )
    3. Hard radiation and X-ray FEL in grating wake field (proposed in 2001, ref. , patent claim 2001 with J.Boyce).

Selected Recent Publications

  • Circular Modes, Beam Adapters and their Applications in Beam Optics /ref. /
  • Prospects of High Energy Electron Cooling / ref. /
  • A Low Emittance, Flat Beam Electron Source for Linear Colliders /ref. /
  • Optical Principles of Beam Transport for Relativistic Electron Cooling /ref. /
  • Advanced Optical Concepts for Electron Cooling /ref. /
  • RF Driven Stable Spin-Flipping Motion of a Stored Polarized Beam /ref. /
  • Superconducting RF Polarimetry with RF Siberian Snakes /ref. /
  • Bending Siberian Snakes for Suppression of Quantum Depolarization /ref. /
  • Microbunch Radiative Tail-Head Interaction /ref. /
  • Transverse Effects of Microbunch Radiative Interaction /ref. /
  • A Proposal of a Novel Two Beam Accelerator /ref. /
(and complete list of papers)

Seminars and Conference Presentations

  • On Possibilities of Reactive RF Control /oral presentation at Low Level RF Control workshop, TJNAF, Apr. 25-27, 2001
  • Polarized Deuterons in Colliders Invited talk at Snowmass 2001 APS workshop, July 2001, Snowmass, Colorado
  • Flat to Round Colliding Beams, Oral presentation, ibid.
  • Slippage Compensation Methods for Electron Beams. Accelerator Physics seminar, TJNAF, Febr. 09, 2001
  • Space Charge, Emittance, and Hollow Beams. Acc. Physics seminar, TJNAF, March 23, 2001
(and complete list of presentations)

Professional Activities

  • Member of American Physical Society
  • Member of the New York Academy of Sciences
  • Member of the American Association for the Advancement of Science