Beam Physics / Accelerator Physics

Also see:

Kwang-Je Kim Kwang-Je Kim

Ph.D., Maryland, 1970.
Argonne Distinguished Fellow, Accelerator Systems Division/Advanced Photon Source, Argonne National Laboratory.
Professor (part time), Dept. of Physics, Enrico Fermi Institute.

GENERAL GOAL: Investigation of particle and photon beams and their mutual interactions with the goal of developing novel high-performance accelerators and radiation devices.

RECENT RESEARCH TOPICS: Study of electron-radiation beam interaction, providing pioneering analysis of the high-gain free-electron laser principles. Pioneering contributions to particle beam re-partitioning techniques in transverse-to-transverse and transverse-to-longitudinal phase space. Study of muon beam cooling schemes and ionization cooling theory. Development of a Smith-Purcell backward wave oscillator making use of an electron microscope towards a table-top terahertz generator. Pioneering study of fully coherent x-ray free-electron laser oscillator (XFELO) towards drastic improvement of the coherence and brightness beyond the current, self-amplified spontaneous emission based XFELs. Invention of four-crystal configuration of an x-ray cavity for tunable XFELO. Pushing the state-of-the-art in the x-ray optics technology necessary for an XFELO, including defect-free diamond crystals and ultralow-emittance electron injector .

Selected Publications:

  • K.-J. Kim, “A Synchrotron Radiation Source with Arbitrarily Adjustable Elliptical Polarization,” Nucl. Instrum. Methods, 219, 425 (1984).
  • K.-J. Kim,“Three-Dimensional Analysis of Coherent Amplification and Self-Amplified Spontaneous Emission in Free Electron Lasers,” Phys. Rev. Lett., 57, 1871 (1986).
  • Z. Huang and K.-J. Kim, "Formulas for Coherent Synchrotron Radiation Microbunching in a Bunch Compressor Chicane," PRST-AB 5, 074401 (2002).
  • K.-J. Kim and C.x. Wang, “Formulae for Transverse Ionization Cooling in Solenoidal Focusing Channels,” Phys. Rev. Lett., 85, 760 (2000).
  • C.-X. Wang and K.-J. Kim, "Linear Theory of Ionization Cooling in 6D Phase Space," Phys. Rev. Lett. 88, 184801 (2002).

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Updated 2/2011

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Young-Kee Kim

​Young-Kee Kim

Ph.D., University of Rochester, 1990.
Louis Block Professor, Dept. of Physics, Enrico Fermi Institute, and the College.
Experimental physics, particle physics, accelerator physics
Young-Kee Kim's homepage

See Professor Kim's entry under Experimental Particle Physics.

sergei Sergei Nagaitsev

Ph.D., Indiana-Bloomington, 1995.
Chief Accelerator Officer, Fermi National Accelerator Laboratory.
Professor (part time), Dept. of Physics, Enrico Fermi Institute.

My research focuses on nonlinear beam dynamics in high-intensity particle accelerators. For the next 20 years the domestic research program in the field of elementary-particle physics in the United States will rely on high-intensity particle accelerators to study neutrinos and rare decays. Current accelerator technology is approaching beam intensity limitations, mostly because of particle losses due to the constrained beam dynamics of the conventional linear focusing lattice, invented in the 1950-s. Currently, my research is focused on the implementation of a novel concept that promises to significantly increase the practical limits on beam intensity: a highly-nonlinear, integrable lattice that dramatically increases the stability of beams in circular high intensity accelerators. The integrable optics (IO) lattice employs specifically-tailored non-linear components of the beam focusing system to enhance the stable region of particle motion in circular machines and to increase damping mechanisms. To demonstrate this concept, a test accelerator, the IOTA, is being constructed at Fermilab. If successful, the IO approach will have a disruptive impact on high intensity circular machine capabilities in high energy physics research, medical and industrial applications.

Selected Publications:

  • “Accelerator-feasible N-body nonlinear integrable system,” V. Danilov and S. Nagaitsev, Phys. Rev. ST Accel. Beams 17, 124402.
  • “Nonlinear accelerator lattices with one and two analytic invariants,” V. Danilov and S. Nagaitsev, Phys. Rev. ST Accel. Beams 13, 084002.
  • "Fermilab 4.3 MeV electron cooler," S. Nagaitsev, L. Prost and A. Shemyakin, 2015 JINST 10 T01001.

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Updated 2/2015

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