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Jean R. Delayen
Sr. Staff Scientist
CASA Fellow



Contact:
Center for Advanced Studies of Accelerators
Thomas Jefferson National Accelerator Facility
12000 Jefferson Avenue, Suite 13
Newport News, VA 23606
757-269-7420 (phone)
delayen@jlab.org

Education:
  • Ingenieur, Ecole Nationale Superieure d'Arts et Metiers, Paris, 1970
  • MS, California Institute of Technology, 1971
  • PhD, California Institute of Technology, Low Temperature Physics, 1977
    Thesis: Phase and Amplitude Stabilization of Superconducting Resonators
  • MBA, University of Chicago, 1994

Career:

  • Jefferson Lab, 1995-Present
    Head Accelerator Development Department, 1995-2001
    Fellow, 2001-present
  • Argonne National Laboratory, Technology Development Division, 1987-1995
    Program Manager for SRF and Accelerator Physics
  • California Institute of Technology, Low Temperature Physics, 1977-1986
    Scientist, 1977-1980
    Senior Scientist, 1980-1986

Patent:

  • RFQ Device for Accelerating Particles (with K. W. Shepard), 1995

Research Highlights:

  • Physics and technology of superconducting linacs
    • RF structures design
    • Phase and amplitude control of rf fields
    • Interactions between particles and rf fields
    • Beam instabilities
    • High-current effects in linacs
  • RF superconductivity
    • Electromagnetic properties of superconductors
    • Development of new materials and preparation techniques
  • Knowledge management and diffusion
  • Economic theory, game theory

Selected Recent Publications

  • Medium-β Superconducting Accelerating Structures
    (Invited) J. R. Delayen, Proc. 2001 RF Superconductivity Workshop, Tsukuba, Japan

  • Electronic Damping of Microphonics in Superconducting Cavities
    Jean Delayen, Proc. 2001 Particle Accelerator Conference

  • Cumulative Beam Breakup in Linear Accelerators with Arbitrary Beam Current Profile
    Jean Delayen, Proc. 2001 Particle Accelerator Conference

  • Operational Optimization of Large-Scale SRF Accelerators
    J. R. Delayen, L. R. Doolittle, C. E. Reece, Proc. 1999 Particle Accelerator Conference

  • Fokker-Planck Approach to the Dynamics of Mismatched Charged-Particle Beams
    C. L. Bohn, J. R. Delayen, Physical Review E, 50, 1516-1534 (1994)

  • Design Considerations for High-Current CW Superconducting Ion Linacs
    J. R. Delayen, C. L. Bohn, B. J. Micklich, C. T. Roche, L. Sagalovsky
    Proc. of the 1993 Particle Accelerator Conference

  • Alternating-Phase Focusing with Amplitude Modulation
    L. Sagalovsky, J. R. Delayen, Proc. of the 1993 Particle Accelerator Conference

  • Design and Test of a Superconducting Structure for High-Velocity Ions
    J. R. Delayen, W. L. Kennedy, C. T. Roche, Proc. of the 1992 Linear Accelerator Conference

  • Design and Modeling of Superconducting RFQ Structures
    J. R. Delayen, W. L. Kennedy, Proc. of the 1992 Linear Accelerator Conference

  • Phase and Amplitude Stabilization of Beam-Loaded Superconducting Resonators
    J. R. Delayen, Proc. of the 1992 Linear Accelerator Conference

  • Cumulative Beam Breakup in Linear Accelerators with Periodic Beam Current
    C. L. Bohn, J. R. Delayen, Physical Review A 45, 5964-5993 (1992)

  • Test of a Superconducting RF Quadrupole Device
    J. R. Delayen, K. W. Shepard, Applied Physics Letters, 57, 514-516 (1990)

  • Temperature, Frequency, and RF Field Dependence of the Surface Resistance of Polycrystalline YBa2Cu3O7-δ
    J. R. Delayen, C. L. Bohn, Physical Review B, 40, 5151-5154 (1989).

  • Design of Low-Velocity Superconducting Accelerating Structures Using Quarter-Wavelength Resonant Lines
    J. R. Delayen, NIM, A259, 341-357 (1987)

  • Longitudinal Transit Time Factors of Short Independently-Phased Accelerating Structures for Low Velocity Ions,
    J. R. Delayen, NIM, A258, 15-25 (1987).

(and complete list of papers)

Professional Activities

  • Member American Physical Society
  • Member of the Next Linear Collider Machine Advisory Committee, 2000-present
  • Member Strategic Advisory Committee, College of Engineering and Technology, Old Dominion University, 1997-1998


Updated April 4, 2014
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