• Theoretical Condensed-Matter Physics
• Theoretical Elementary Particle Physics
• Astrophysics and General Relativity
• Experimental Elementary Particle Physics
• Accelerator Physics
• Experimental Condensed-Matter Physics
• Biological Physics
• Multidisciplinary Research
• Major Research Facilities
• Resources for Researchers

B.S., 1958, Rensselaer Polytechnic Institute. Ph.D, 1964, Cornell University. Research Associate, Cornell University, 1964 -68; Senior Research Associate, Cornell University,1968-77; Professor, Physics, Cornell University, 1977-94. Professor Emeritus, Physics, Cornell University, 1994-present. Visiting appointments at: Institute of High Energy Physics, Beijing; Chinese Academy of Sciences; DESY, Germany. Director, Laboratory of Elementary-Particle Physics, Cornell University, 2000-present . Fellow, American Academy of Arts and Sciences. Member, National Academy of Science.

Research Areas
Accelerator physics; superconductivity

Current Research

R & D for the International Linear Collider (ILC).
R & D for the Energy Recovery Linac (ERL).

Spotlight

Michael Ehrlichman, graduate student, is working in Professor Georg Hoffstaetter’s group researching the effect of ionized residual gas on particle accelerator beams.  Residual gas molecules ionized by charged particle beams can become trapped in the potential well of the beam.  These trapped ions exert a nonlinear focusing force on the beam that can reduce beam quality.  The ions can also undergo coupled oscillations with the beam.  These coupled oscillations can become unstable and increase the effective dimensions of the beam or ...
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