Associate Director, PSFC
Head, Plasma Science and Technology
Senior Scientist, MIT Dept. of Physics
B. A., Harvard College (1966)
Ph. D., Massachusetts Institute of Technology (1971)
Electron Cyclotron Maser/Gyrotron: Experimental and theoretical research on high frequency (50 - 600 GHz), high power (up to 1.5 MW) gyrotrons and their application to plasma heating; radar; and plasma diagnostics.
High Gradient Acceleration: High gradient electron accelerators capable of operation at gradients above 100 MeV/meter. Research on novel accelerator structures including photonic bandgap structures and metamaterials.
High Power Microwave Research: Novel sources of high power microwaves and novel structures for microwave generation.
Terahertz Vacuum Electron Devices: Novel concepts for vacuum electron devices, such as the overmoded traveling wave tube, which can produce tens of watts of power at terahertz frequencies.
Low-Loss Transmission Lines for Millimeter Wave Radiation: Theoretical and experimental research on overmoded transmission lines for millimeter wave and THz radiation including corrugated metallic waveguides.
High Magnetic Field, Nuclear Magnetic Resonance (NMR): Dynamic nuclear polarization (DNP) using combined NMR and electron spin resonance (ESR) at high magnetic fields (5 - 20T). Research on continuous wave and pulsed microwave oscillators and amplifiers for DNP / NMR.
Vacuum electron device with a photonic bandgap structure and method of use thereof, US Patent 6801107, (2002).
Photonic band gap structure simulator, US Patent 7117133 (2002).
Photonic crystal ribbon-beam traveling wave amplifier, US Patent 7538608 (2004).
“An Overmoded W-Band Coupled-Cavity TWT,” E. J. Kowalski, M. A. Shapiro, and R. J. Temkin, IEEE Trans. Electron Devices Vol. 62, No. 5 pp. 1609-1616 (2015).
“Sub-wavelength waveguide loaded by complementary electric metamaterial for vacuum electron devices,” Z. Duan, J. S. Hummelt, M. A. Shapiro, and R. J. Temkin Physics of Plasmas 21, 103301 (2014).
“Experimental Results for a Pulsed 110 GHz / 124.5 GHz Megawatt Gyrotron,” D. S. Tax, B. Y. Rock, B. J. Fox, S. K. Jawla, S. C. Schaub, M. A. Shapiro, R. J. Temkin, and R. J. Vernon, IEEE Trans. PS Vol. 42, Issue 5, pp. 1128-1134 (2014).
“Design of a Metamaterial-Based Backward-Wave Oscillator,” J. S. Hummelt, S. M. Lewis, M. A. Shapiro, and R. J. Temkin, IEEE Trans. Plasma Sci., Vol. 42, Issue 4, pp.930-936 (2014).
“A Photonic Band Gap Gyrotron Traveling Wave Amplifier,” E. A. Nanni, S. M. Lewis, M. A. Shapiro, R. G. Griffin, and R. J. Temkin, Phys. Rev. Letters Vol. 111, 235101 (2013).
“Millimeter wave scattering and diffraction in 110 GHz air breakdown plasma,” A. M. Cook, Jason S. Hummelt, M. A. Shapiro, and R. J. Temkin, Physics of Plasmas Vol. 20, 043507 (2013).
“High Frequency Dynamic Nuclear Polarization,” Q. Z. Ni, E. Daviso, T. V. Can, E. Markhasin, S. K. Jawla, T. M. Swager, R. J Temkin, J. Herzfeld and R. G. Griffin, Accounts of Chemical Research, Vol. 46, No. 9, pp. 1933–1941 (2013).
High Powered Microwaves & Nuclear Fusion Energy, Interview at Univ. Michigan, YouTube, Dec. 16, 2014