Welcome to Jim Crittenden's Home Page

E-mail: crittenden@cornell.edu



Office Home
Wilson Synchrotron Laboratory 112 Larchmont Drive
Cornell Laboratory for Accelerator-based Sciences Trumansburg, New York 14886
Cornell University Tel: (607) 387-6544
Ithaca, New York 14853-8001
Tel: (607) 255-4882


Curriculum vitae as of August, 2015 (ps ,pdf) and photos (2001,2005)

The Electron-Positron Storage Ring CESR at Cornell University

On October 1, 2001, I joined the Operations Group at CESR (click here for a tour). CESR has been in operation for over 35 years at the Wilson Synchrotron Laboratory, part of the Cornell Laboratory for Accelerator-based Sciences at Cornell University, which conducts research in photon science, accelerator physics, and particle physics and astrophysics. My arrival coincided with a new era in CESR's history of providing colliding beams of electrons and positrons for high-statistics studies of electron-positron interactions. Beginning in the Fall of 2001, the beam energies were chosen such as to allow high-precision studies of decays of the Upsilon family of resonances. The proposed CESR-c project, described in detail here, made it possible to extend these high-statistics studies to the physics of mesons containing charm quarks. Operation of CESR as a charm factory began following accelerator R&D and installation work, continuing into 2008.

In addition to operation as an e+e- collider, the CESR ring serves to provide photon beams for X-ray science under the aegis of the Cornell High-Energy Synchrotron Source (CHESS) laboratory. My work includes contributions to the responsibility of the Operations Group for maintaining high-quality X-ray beams, including machine studies experiments, performance modeling, and upgrades. Detailed plans for a major upgrade of the photon beams, based on Energy Recovery Linac (ERL) technology, are underway.

The CESR ring was reconfigured and instrumented as a test accelerator (CESRTA) for low-emittance beams in 2008, investigating potential performance limitations at future accelerator facilities, including the International Linear Collider. Much of my effort now concerns experimentation, data analysis and modeling in the context of this accelerator R&D project, along with my contribution to the operation of CESR for CHESS.

A persuasive argument in favor of a role for elementary-particle experimentalists in future accelerator design and development may be found in an article by Maury Tigner published in the January, 2001 issue of Physics Today.

Current Projects


Past Projects




  • CESR Lattice Characterization Calculations



  • Presentation on Beam Current Limitations and Duty Cycle Considerations (html,ps)
    to the CESR-c MiniMAC workshop held at Cornell University July 22-23, 2005


  • Design of 1-m-long solenoid magnets for new CLEO-solenoid compensating CESR optics



  • Design of a Large-Aperture Quadrupole Magnet for the Fast Luminosity Monitor Project


  • Synchrotron-light-based Measurement of CESR Beam Size


  • CESR Wiggler Magnet Field Calculations





  • Dismantling and Re-installation of the Interaction Region Beamline Components during the 2003 March-July shutdown




    Related Publications




    Related Talks