Paul Farrell

Ph.D. Physics, President

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Dr. Farrell co-founded Brookhaven Technology Group, Inc. (BTG) in 1987 and currently serves as president. His professional work with accelerators includes two patents; one on a method of improving the lifetime of tritium targets used for neutron cancer therapy, and another that describes a unique method of stabilizing the voltage of dc accelerators during pulsed operation, a method that improves the beam quality of free electron laser systems.

Dr. Farrell received a B.S. in Physics from The University of Chicago and a Ph.D. in Nuclear Physics from the University of Pittsburg.


  • New York Academy of Sciences
  • Association for Advancement of Medical Instrumentation (AAMI), cochairman of the Working Group on Electron Beam Sterilization of Medical Devices from 1985 to 1989, and currently a member of the ISO committee on Radiation Sterilization of Medical Devices
  • Council on Ionizing Radiation Measurements and Standards, Chairman, Materials Effects Sub Committee.
  • American Physical Society (APS)
  • American Society of Testing and Materials ASTM

Selection of Publications and Presentations

  1. J. P. Farrell, K. J. Hemmerich, Selecting a radiation sterilization method, (1995), Medical Device & Diagnostic Industry, 17, No.8, pp. 82-90. Canon Communications, Inc. Santa Monica, CA.
  2. J. P. Farrell, J. T. Allen, C. B. Williams, K. Whitham, et. al., A fully integrated 10 MeV electron beam sterilization system, (1995), Rad. Phys. Chem. 46, No. 4-6, pp. 457 – 460, Pergamon Press, Great Britain.
  3. J. Paul Farrell, Industrial Applications of Electron Beams and X-Rays, (1993) Electric Power Research Institute, Scoping Study RP-2662-40, to be published.
  4. CH2M Hill in Association with Stanley Humphries, jr. and J. Paul Farrell, Options Analysis, Machine Sources for Food Irradiation, (1988), U.S. DoE, Advanced Radiation Tec-nology Programs,. NTIS (1988).
  5. Noel. A. Guardala, Evan T. Williams and J. Paul Farrell A Small Inexpensive Scattering Chamber Constructed From Commercially Available Components, Nucl. Instr. and Meth. B24/25 pp. 652-654(1987).
  6. D. Yan, J. Paul Farrell, P.M.S. Lesser, F.H. Pollak, T.F. Kuech and D J Wolford Measurement of Absolute Al Concentration in AlGaAs, Nucl. Instr. and Meth. B24/25 pp. 662-666(1987).
  7. D. Yan, J. Paul Farrell, P.M.S. Lesser and T.F. Kuech Channeling as an Impediment to Ion Beam Analysis. Presented at Ninth Conference on the Application of Accelerators in Research and Industry, Denton, TX(1986).
  8. D. Yan, J. Paul Farrell, P.M.S. Lesser and T.F. Kuech. Quantitative Analysis Using the Al(p,J) Reaction, Presented at Ninth Conference on the Application of Accelerators in Research and Industry , Denton TX(1986).
  9. K.H. Purser, J. P. Farrell Some Principles Underlying Ion Optics Design, in ION IMPLANTATION Science and Technology, J.F. Ziegler, Editor Academic Press (1984).
  10. J. P. Farrell, K.H. Purser The General Ionex High Energy Ion Implanter, in Ion Science and Technology, 95, pp. 3-l5, Tokyo, Japan, l983.
  11. S.M. Seltzer, J. P. Farrell, J. Silverman, Bremsstrahlung Beams from High-Power Electron Accelerators for Use in Radiation Processing, (1983), IEEE Transactions on Nuclear Science, NS-30, No. 2, April 1983.
  12. J. P. Farrell, S.M. Seltzer, J. Silverman, Bremsstrahlung Generators for Radiation Processing, (1983), Rad. Phys. Chem., 22, No. 3-5, pp. 469-478, Pergamon Press, Ltd.
  13. J. P. Farrell, High Power Bremsstrahlung Sources for Radiation Sterilization, (1979), Rad-. Phys. Chem, l4, pp. 377-387, Pergamon Press, Ltd., l979.
  14. N. Austern, J. P. Farrell, K. Kabir, C.M. Vincent Effects of Imaginary Potentials in a Three-Body Deuteron-Nucleus Scattering Model, Physical Review C, l8, No. 4, Oct. l978, pp. l577-l581.
  15. N. Austern, C.M. Vincent, J. P. Farrell, Three-Body Model of Deuteron Breakup and Stripping II, Annals of Physics, 114, Nos. 1 and 2, Sept 1. 1978, pp. 93-122.
  16. M.R. Cleland, J. P. Farrell Methods for Calculating Energy and Current Requirements for Industrial Electron Beam Processing, Proceedings of the Fourth Conference on Applica-tions of Small Accelerators, North Texas State University, Denton, Texas, l976.
  17. M.R. Cleland, J. P. Farrell, R.L. Malnati, K.H. Morgenstern The Use of High-Power Electron Beam Radiation for the Treatment of Municipal and Industrial Wastes, International Atomic Energy Agency, SM-l94/5-02, The Symposium on the Use of High Level Radiation in Waste Treatment, Munich, Germany, March l975.
  18. J. P. Farrell, C.M. Vincent, N. Austern Three-Body Model of Deuteron Breakup and Stripping, Annals of Physics, l96, No. 2, 1976, p. 333.
  19. J. P. Farrell The Bremsstrahlung Radiation Field of a Scanned Monoenergetic Electron Beam, International Physics Fair, Basel., Switzerland, l966.
  20. M.R. Cleland, J. P. Farrell D”, IEEE Transactions in Nuclear Science, June l965, P. 277.
  21. International Meeting on Radiation Processing (IMRP) Istanbul, Turkey, (1994)
  22. MDDI East New York, NY 1992 Electron Accelerators for Radiation Sterilization Applications 
  23. Pfizer Sterilization Forum Boulder, CO 1991 Advances in Electron Beam Sterilization
  24. International Meeting on Radiation Processing (IMRP) Dubrovnik, Yugoslavia (1982)