Center for Advanced Studies of Accelerators

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

• 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
  

• 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 YBa₂Cu₃O_7-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