• B.S., Physics, 1960, Rensselaer Polytechnic Institute, Troy, NY
• Ph. D., Physics, 1967, Cornell University, Ithaca, NY

• September 1960 - June 1961, and September 1961 - June 1962, Teaching Asst., Cornell University Physics Department
• June 1961 - September 1961, and June 1962 - September 1962, Research Asst., Brookhaven National Laboratory
• September 1962 - August 1966, Research Asst., Cornell University, Laboratory of Nuclear Studies
• September 1966 - August 1967, Lecturer, Tufts University, Physics Department
• September 1967 - August 1969, Asst. Prof., Tufts University, Physics Department
• August 1969 - July 1987, Staff Physicist, Stanford Linear Accelerator Center
• September 1987 - September 1998, Senior Scientist, Jefferson Laboratory (formerly CEBAF)
• October 1998 - present, Principal Scientist, Jefferson Laboratory
• From September 1967 through August 1968, Dr. Sinclair was a Visiting Scientist at the Stanford Linear Accelerator Center.
• Dr. Sinclair was promoted to Associate Professor of Physics, with tenure, at Tufts University effective September 1969. He declined this position to accept an appointment at the Stanford Linear Accelerator Center.
• From 1971 through 1979, Dr. Sinclair was the Head of the Spectrometer Facilities Group at the Stanford Linear Accelerator Center.
• At Jefferson Laboratory, Dr. Sinclair, a Principal Scientist, is presently Deputy Head of the Accelerator Division, and Acting Head of the Institute for Superconducting Radiofrequency Science and Technology. He has recently served as the Interim Associate Director of the Accelerator Division.

• Adjunct Professor of Physics, Old Dominion University, Norfolk, VA, 1994 to 2000.
• Adjunct Professor of Applied Science, College of William and Mary, Williamsburg, VA, 1995 to 1999.
• Adjunct Professor of Physics, University of Illinois (Champaign/Urbana), 1998 to present.

• New York State Regents Scholar, 1956-1960
• Alfred Sloan Foundation Fellowship, 1969 (n.b. award declined to accept position at SLAC)
• Fellow, American Physical Society, 1986

During his early professional career, Dr. Sinclair played a lead role in the development of methods for the generation of highly polarized and monochromatized high energy gamma ray beams. Polarized gamma beams were successfully developed by three techniques:

• Compton backscattering of polarized laser light;
• collimation of coherent bremsstrahlung from very thin diamond radiators;
• and attenuation of bremsstrahlung by coherent pair production.

He was a member of the experimental groups which employed these beams in photoproduction studies utilizing both bubble chambers and magnetic spectrometers. These studies provided the first demonstration of s-channel helicity conservation in vector meson photoproduction, and the dominance of unnatural parity exchange in all pseudoscalar meson photoproduction reactions.

Following this work, Dr. Sinclair's interests moved to the production, measurement, and experimental utilization of high energy polarized electron beams. He participated in the development of the first Mφller polarimeter to measure high energy electron polarization, and in the first measurements of polarized electron-polarized proton scattering at high energy. He played a very major role in the development of the GaAs polarized electron source as an accelerator injector, and in the use of this source at SLAC for the first measurements of parity non-conservation in high energy inelastic electron scattering from deuterium. He was an active member of a small group which developed the first laser Compton polarimeter, and made the first measurements of the polarization of a circulating positron beam in an electron-positron storage ring. More recently, he has led the development of a very high precision Mott polarimeter operating at MeV energies.

Soon after the discovery of the J/φ and φ' particles, he worked with a group which made the first measurements of the photoproduction of these particles, clearly demonstrating their hadronic character.

Over time, Dr. Sinclair's interests moved into a variety of accelerator physics and technology related areas. He has developed several high peak current and very high voltage photoemission electron guns employing GaAs cathodes, and has planned and conducted a number of experiments designed to bring photoemission cathodes to their full potential. He had a lead role in the development of the high current single bunch injector for the Stanford Linear Collider. He participated in the first development of a superconducting RF electron gun with a photoemission cathode.

Since coming to Jefferson Laboratory (formerly CEBAF), Dr. Sinclair has worked primarily on the development of various accelerator subsystems, including the original thermionic injector, the vacuum system for the full accelerator, the polarized injector for the accelerator, the RF separators for beam extraction, the high voltage DC injector for the FEL, many beam diagnostic devices, and the beam dumps for the full power accelerated beam. He led the CEBAF Front End Test, which demonstrated high average current energy recovery, and established the stability of the CEBAF accelerator against transverse beam breakup. He served as the Head of the Accelerator Operations Department during the commissioning of the full accelerator. He led the Injector Group for many years. More recently, he served as Associate Director (acting) of the Accelerator Division, and is now Deputy Head of the Accelerator Division.

Dr. Sinclair has participated in the research of six Ph.D. students (Bruce Dunham, Nicholas Sereno, David Engwall, and Joseph Grames at the University of Illinois, Achim Michalke at the University of Wuppertal, and Thomas Venhaus at the College of William and Mary). He has taught a course on Electron Injectors in conjunction with the U.S. Particle Accelerator School in Beijing (November 1998) and at Vanderbilt University (January 1999).

(and complete list of papers)

• Organizing Committee for The International Symposium on High Energy Spin Physics, 1978.
• Organizing Committee for The Linear Accelerator Conference, 1988.
• Organizing Committee for The Symposium on High Temperature Superconductors in High Frequency Fields, 1990.
• Organizing Committee for IEEE/APS Particle Accelerator Conference, 1991, 1993, 1995, 1997.
• Organizing Committee for Conference on Intersections Between Particle and Nuclear Physics, 1991.
• Organizing Committee for International Workshop on Polarized Gas Targets and Polarized Beams,1997.
• Organized the first two International Workshops on Polarized Electron Sources, 1983 at Stanford, and 1988 at the University of Minnesota.
• Program Committee of the US Particle Accelerator School, 1992 to 1998
• Program Advisory Committee of the Bates Linear Accelerator Center(MIT) 1998 - 2001.

• Sigma Xi, 1959 to present.
• American Physical Society, 1962 to present.
• American Vacuum Society, 1988 to present.