Return to Faculty Directory

Sedwick, Ray

Sedwick, Ray
Associate Professor
Department of Aerospace Engineering
Space Power and Propulsion Laboratory (SPPL)
Center for Orbital Debris Education and Research
(CODER)
3146 Glenn L. Martin Hall
Email: 
Phone: 
301-405-0111

Research Interests 

Space power and propulsion technologies, applications of plasmas, orbital debris

Education 

  • B.S., Penn State University (Aerospace Engineering)
  • S.M., Massachusetts Institute of Technology (Aeronautics and Astronautics)
  • Ph.D., Massachusetts Institute of Technology (Aeronautics and Astronautics)

Selected Publications 

Journal Articles

  • Kumar, R. and R. Sedwick, “Despinning Orbital Debris before Docking using Laser Ablation”, AIAA Journal of Spacecraft and Rockets, 2015, Vol.52: 1129-1134, 10.2514/1.A33183
  • Chap, A.M. and R.J. Sedwick, “One-Dimensional  Semi-analytical Model for Optimizing the Standing-Wave Direct Energy Converter (SWDEC)”, AIAA Journal of Propulsion and Power, 1-12, April, 2015, 10.2514/1.B35439.
  • Alinger, D.J., A.K. Porter and R.J. Sedwick, “Optimization of Resonant Inductive Wireless Power Transfer Using Multilayer Flat Spiral Coils”, AIAA Journal of Spacecraft and Rockets, 2015, accessed March 18, 2015, doi: http://arc.aiaa.org/doi/abs/10.2514/1.A32901
  • Porter, Allison K., Dustin J. Alinger, Raymond J. Sedwick, John Merk, Roedolph A. Opperman, Alexander Buck, Gregory Eslinger, Peter Fisher, David W. Miller, and Elisenda Bou, "Demonstration of Electromagnetic Formation Flight and Wireless Power Transfer," AIAA Journal of Spacecraft and Rockets, 2014, Vol.51: 1914-1923, doi: 10.2514/1.A32940
  • Smith, E.S., R.J. Sedwick, J.F. Merk and J. McClellan, “Assessing the Potential of a Laser Ablation Propelled Tug to Remove Large Space Debris”, AIAA Journal of Spacecraft and Rockets, 50, 6 (2013), pp. 1268-1276.  doi: 10.2514/1.A32439
  • Wilson, A.H., J.J Vitucci and R.J. Sedwick, “Flux tailoring of a permanent magnet field with a high temperature superconducting tube for a helicon plasma source”, IEEE Transactions on Applied Superconductivity, 22, 5, 2012.
  • Sedwick, R.J., “A fully Analytic Treatment of Resonant Inductive Coupling in the Far Field”, Annals of Physics, 327, 2, pp. 407-420, 2011.
  • Kwon, D.W., R.J. Sedwick, S. Lee, J.L. Ramirez-Riberos, “Electromagnetic Formation Flight Testbed Using Superconducting Coils”, AIAA J. of Spacecraft and Rockets, 48, 1, pp. 124-134, 2011
  • Schweighart, S.A. and R.J. Sedwick, “Explicit Dipole Trajectory Solution for Electromagnetically Controlled Spacecraft Clusters”, AIAA J. of Guidance, Control, and Dynamics, 33, 4, pp. 1225-1235, 2010.
  • Sedwick, R.J., “Long Range Inductive Power Transfer with Superconducting Oscillators”, Annals of Physics (2009), doi:10.1016/j.aop.2009.08.011
  • Kwon, D.W. and R.J. Sedwick, “Cryogenic Heat Pipe for Cooling High Temperature Superconducting Coils”, AIAA J. of Thermophysics and Heat Transfer, 23, 4, pp. 732-739, 2009.
  • Kwon, D.W. and R.J. Sedwick, “Cryogenic Heat Pipe for Cooling High Temperature Superconductors”, Cryogenics, 49, 9, pp. 514-523, 2009.
  • Sedwick, R.J., Kerrebrock, J.L. and D.A. Zayas, “Magnetohydrodynamic Vortex Containment for Gas Core Nuclear Propulsion, Part I: Concept Overview”, AIAA Journal of Propulsion and Power, Vol 23, No. 1, Jan-Feb 2007.
  • Sedwick, R.J. and D.A. Zayas, “Magnetohydrodynamic Vortex Containment, Part II: Equilibrium of Uranium Fluoride Fuel in Hydrogen Propellant”, AIAA Journal of Propulsion and Power, Vol 23, No. 1, Jan-Feb 2007.
  • Sedwick, R.J. and D.A. Zayas, “Magnetohydrodynamic Vortex Containment, Part III: 1-D Axisymmetric Flow Model”, AIAA Journal of Propulsion and Power, Vol 23, No. 2, Mar-Apr 2007.
  • Sedwick, R.J. and D.A. Zayas, “Magnetohydrodynamic Vortex Containment, Part IV: System Performance Assessment”, AIAA Journal of Propulsion and Power, Vol 23, No. 2, Mar-Apr 2007.
  • Elias, L.M., D.W. Kwon, R.J. Sedwick and D.W. Miller, "Electromagnetic Formation Flight Dynamics including Reaction Wheel Gyroscopic Stiffening Effects" Journal of Guidance, Control, and Dynamics, Vol. 30, No. 2, Mar-Apr. 2007, pp. 499-511.
  • Schweighart, S.A. and R.J. Sedwick, “Cross-Track Motion of Satellite Formations in the Presence of J2 Disturbances”, AIAA Journal of Guidance Control and Dynamics, Vol 28, No. 4, Jul-Aug 2005.
  • McGuire, T.J. and R. J. Sedwick, “Improved Confinement in Inertial Electrostatic Confinement for Fusion Space Power Reactors”, AIAA Journal of Propulsion and Power, Vol 21, No. 4, Jul-Aug 2005.
  • Kong, E.M.C, D.W. Kwon, S.A. Schweighart, L.M. Elias, R.J. Sedwick and D.W. Miller, “Electromagnetic Formation Flight for Multi-Satellite Arrays”, AIAA Journal of Spacecraft and Rockets, Vol 41, No. 4, Jul-Aug 2004.
  • Schweighart, S.A. and R.J. Sedwick, “High-Fidelity Linearized J2 Model for Satellite Formation Flying”, Journal of Guidance Control and Dynamics, Vol 25 No. 6, Nov-Dec, 2002.
  • Enright, J.P., R.J. Sedwick and D.W. Miller, “High-Fidelity Simulation for Spacecraft Autonomy Development”, Canadian Aeronautics and Space Journal, Vol. 48, No. 1, March 2002.
  • Jilla C.D, D.W. Miller and R.J.Sedwick, "Application of Multidisciplinary Design Optimization Techniques to Distributed Satellite Systems", Journal of Spacecraft and Rockets, Vol. 37, No. 4, 2000.

Conference Proceedings

  • Chap, A.M. and R.J. Sedwick, “Simulation of an Inertial Electrostatic Confinement Device Using a Hermite N-body Individual Time-step Scheme”, AIAA 2015-3860, 51st AIAA/SAE/ASEE Joint Propulsion Conference, 2015, 10.2514/6.2015-3860.
  • Vitucci, J.J. and R.J. Sedwick, “Improved Superconducting Magnet System to Reduce Upstream Boundary Power Losses in a Helicon Plasma Thruster”, AIAA 2014-3405, 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2014, 10.2514/6.2014-3405.
  • Chap, A.M. and R.J. Sedwick, “A Hybrid Particle-in-cell Simulation for a Multiple Grid Magnetic Core Inertial Electrostatic Confinement Device”, AIAA-2014-3516, 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2014, 10.2514/6.2014-3516.
  • Porter, A.K., D. Alinger, R.J. Sedwick, et al., “Dual-purpose Resonant Actuators for Electromagnetic Formation Flight and Wireless Power Transfer”, AIAA 2014-0449, AIAA Guidance, Navigation, and Control Conference, 2014, 10.2514/6.2014-0449.
  • Faust, A.J. and R.J. Sedwick, “Performance of a Helicon Thruster using Helium, Argon, and Water Vapor”, AIAA 2014-0141, 52nd Aerospace Sciences Meeting, 2014, 10.2514/6.2014-0141.
  • Saripalli, P.S. and R.J. Sedwick, "Development of a Green Propellant Station-Keeping Thruster using a Dielectric Barrier Discharge," AIAA-2013-3882, AIAA Joint Propulsion Conference & Exhibit, San Jose, CA, Jul 14-17, 2013.
  • Vitucci, J. and R. Sedwick, "Development of Superconducting Magnets for a Helicon Plasma Thruster", AIAA 2013-3829, 49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, San Jose, CA, Jul 14-17, 2013
  • Faust, A., Sedwick, R., "Comparison of Plasma Diagnostics for an Argon and Helium Gas Helicon Thruster," AIAA-2013-3828, 49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, San Jose, CA, July 14-17, 2013.
  • Vitucci, J. and R. Sedwick, “Development of a Superconducting Helicon Thruster”, 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2012, 10.2514/6.2012-3866.
  • Faust, A.J., R.J. Sedwick, " Comparison of Plasma Diagnostics of a Helicon Thruster using Argon and Water Vapor with Helium," IEPC-2013-408, 33rd International Electric Propulsion Conference, George Washington University, Washington D. C., Oct. 6-10, 2013
  • Faust, A., Sedwick, R., "Performance of a Helicon Thruster using Helium, Argon, and Water Vapor," AIAA-2014-0141, SciTech 2014, 13-17 January 2014, National Harbor, MD.
  • Korkut, B., J.A. Young, D.A. Levin, and R.J. Sedwick,, “Comparison of Ion Thruster Plumes Generated in the SPPL-1 Facility with DSMC Simulations using AMR”, AIAA-2014-0139, SciTech 2014, 13-17 January 2014, National Harbor, MD.
  • Masati, A., Sedwick, R. J., “Parametric Study of Particle Size for Plasma Actuator PIV Measurements,” AIAA 2014-0147, SciTech 2014, 13-17 January 2014, National Harber, MD.
  • Porter, A.K., D.J. Alinger, R.J. Sedwick, J. Merk, R.A. Opperman, A. Buck, G. Eslinger, P. Fisher, D.W., Miller, E. Bou, “Dual-purpose Resonate Actuators for Electromagnetic Formation Flight and Wireless Power Transfer,” AIAA 2014-0449, SciTech 2014, 13-17 January 2014, National Harber, MD.
  • Young, J., R.J. Sedwick, S. Dumpala, K. Rajan, “High Energy Plume Impingement on Spacecraft Systems”, AIAA-2014-1032, AIAA SciTech 2014, 13-17 January 2014, National Harbor, MD
  • Bou, E., R. Sedwick and E. Alarcon, “Maximizing Efficiency through Impedance Matching from a Circuit-Centric Model of Non-Radiative Resonant Wireless Power Transfer”, IEEE International Symposium on Circuits and Systems, 2013, ISCAS 2013, May 2013, Beijing, China
  • Bou, E., E. Alarcon and R. Sedwick, “Effects of non-resonant interferent objects in Impedance Matched Systems”, at the special session “Circuit Aspects of Non-Radiative Wireless Power Transfer”, PIERS Progress In Electromagnetics Research Symposium, Moscow, Russia, 19-23, August, 2012.
  • Bou, E., E. Alarcon, R. Sedwick and P. Fisher, “Interference analysis on Resonant Inductive Coupled Wireless Power Transfer links”, IEEE International Symposium on Circuits and Systems, 2013, ISCAS 2013, May 2013, Beijing, China
  • Kwon, D.W., R.J. Sedwick and A. Sakaguchi, “Micro-Electromagnetic Formation Flight of Satellite Systems”, AIAA-2010-8725, AIAA Space 2010 Conference, Anaheim, CA, 2010.
  • Sedwick, R.J., “Magnetic Core Multi-Grid Inertial Electrostatic Confinement Fusion”, AIAA-2010-6605, 8th International Energy Conversion Engineering Conference, Nashville, TN, 2010
  • Sedwick, R.J. and M.F. DeMaio, “Superconducting Helicon Thruster”, AIAA-2010-621, 48th AIAA Aerospace Sciences Meeting, Orlando, FL, 2010.
  • Kwon, D.W. and R.J. Sedwick, “Cryogenic Thermal Design of Electromagnetic Formation Flight Satellites”, IAC-08-C4.3, 59th IAC Congress, Glasgow, Scotland, Sep 29-Oct 3, 2008.
  •  Eagle, W., I. Boyd, S. Trepp and R.J. Sedwick, “The Erosion Prediction impact on Current Hall Thruster Model Development”, AIAA-2008-5087, AIAA/ASME/SAE/ASEE JPC, 44th Annual meeting, Hartford, CT, 2008.
  • McGuire, T.J. and R.J. Sedwick, “Numerical Predictions of Enhanced Ion Confinement in a Multi-grid IEC Device”, AIAA-2008-4675, AIAA/ASME/SAE/ASEE JPC, 44th Annual meeting, Hartford, CT, 2008
  • Dietrich, C.C, L.J. Eurice and R.J. Sedwick, “Experimental Verification of Enhanced Confinement in a Multi-grid IEC Device”, AIAA-2008-4675, AIAA/ASME/SAE/ASEE JPC, 44th Annual meeting, Hartford, CT, 2008.
  • Sedwick, R.J. and S.A. Schweighart, “Electromagnetic Formation Flight”, AAS 03-005, 26th Rocky Mt. Guidance and Control Conference, Breckenridge, CO., Feb 5-9, 2003.
  • Dietrich, C.C. and R.J. Sedwick, “A Magnetic Nozzle and Diverter Electrode to Improve Penning Fusion Efficiency”, Workshop on Non-Neutral Plasmas, Santa Fe, NM, July 7-11, 2003.
  • McGuire, T.J., and R.J. Sedwick, “Confinement Limitations in Gridded Inertial Electrostatic Confinement Fusion Devices”, AIAA 2003-4829, AIAA/ASME/SAE/ASEE JPC, 39th Annual meeting, Huntsville, AL, 2003.
  • Dietrich, C.C. and R.J. Sedwick, “Efficiency Improvements for IEC Fusion in a Penning Trap by Electron Re-Circulation”, ”, AIAA 2003-4827, AIAA/ASME/SAE/ASEE JPC, 39th Annual meeting, Huntsville, AL, 2003.
  • Miller, D.W., R.J. Sedwick, E.M.C. Kong and Schweighart, S.A., “Electromagnetic Formation Flight for Sparse Aperture Telescopes”, IEEE 02-428, IEEE 2002 Aerospace Conference, Big Sky, MT, March 2002.
  • Sedwick, R.J. and S.A. Schweighart, “Propellantless Spin-Up and Reorientation of Tethered or Electromagnetically Coupled Spacecraft”, SPIE 4849-26, SPIE Highly Innovative Space Telescope Concepts Conference, Waikoloa, HI, Aug 22-28, 2002.
  • Sedwick, R.J. and D.W. Miller, “System Level Design Trades for the Submillimeter Probe of the Evolution of Cosmic Structure (SPECS)”, SPIE 4849-27, SPIE Highly Innovative Space Telescope Concepts Conference, Waikoloa, HI, Aug 22-28, 2002.
  • Enright, J.P., R.J. Sedwick and D.W. Miller, “An Evolutionary Approach to Engineering Spacecraft Flight Software”, IASTED Applied Informatics 2001: Software Symposium, Feb. 19-22, 2001, Innsbruck, Austria.
  • Marais, K. and R.J. Sedwick, "Space Based GMTI Using Scanned Pattern Interferometric Radar," IEEE 2001 Aerospace Conf., Big Sky, MT, March 2001.
  • Schweighart, S.A. and R.J. Sedwick, "A Perturbative Analysis of Geopotential Disturbances for Satellite Cluster Formation Flying," IEEE 2001 Aerospace Conference, Big Sky, MT, March 2001.
  • Enright, J., R.J. Sedwick and D.W. Miller, “An Enabling Development Environment for Spacecraft Autonomy”, AAAI Spring Symposium: Robust Autonomy, March 26-28, 2001, Stanford, CA.
  • Reichbach, J.G., R.J. Sedwick and M. Martinez-Sanchez, "Micropropulsion System Selection for Precision Formation Flying Satellites," AIAA 01-3646, AIAA/ASME/ SAE/ASEE JPC, 37th Annual meeting, Salt Lake City, Utah, Jul 2001.
  • McGuire, T.J., and R.J. Sedwick, "Aero-Assisted Orbital Transfer Vehicles Utilizing Atmosphere Ingestion", AIAA 01-0840, AIAA Aerospace Sciences Conference, 39th Annual meeting, Reno, NV, January 2001.
  • Miller, D.W., R.J. Sedwick, K. Hartman, “Evolutionary Growth of Mission Capability Using Distributed Satellite Sparse Apertures: Application to NASA’s Soil Moisture Mission (EX-4)", 2001.
  • Marais, K. and R.J. Sedwick, “Cluster Design for Scanned Pattern Interferometric Radar”, AIAA 01-4654, AIAA Space 2001 Conference and Exhibit, Albuquerque, NM, August 28-30, 2001.
  • Schweighart, S.A. and R.J. Sedwick, “Development and Analysis of a High Fidelity Linearized J2 Model for Satellite Formation Flying”, AIAA 01-4744, AIAA Space 2001 - Conference and Exposition, Albuquerque, NM, Aug. 28-30, 2001.
  • Sedwick, R.J., T.L. Hacker, K. Marais, "Performance Analysis for an Interferometric Space-Based GMTI Radar System", IEEE 2000 International Radar Conference, Alexandria, VA; May 7-12, 2000.
  • Enright, J.P., R.J. Sedwick and D.W. Miller, “High-Fidelity Simulation for Spacecraft Autonomy Development”, Astro-2000 11th CASJ Conference on Astronautics, Nov. 6-9, 2000, Ottawa, Ontario.
  • Kong, E.M.C., D.W. Miller, and R.J. Sedwick, "Exploiting Orbital Dynamics for Aperture Synthesis Using Distributed Satellite Systems: Applications to a Visible Earth Imager System", AAS/AIAA Space Flight Mechanics Mtg, AAS 99-122, Feb 1999.
  • Kong, E.M.C., D.W. Miller, and R.J. Sedwick, "Exploiting Orbital Dynamics for Stellar Separated Spacecraft Interferometry," ACC99-I014-04, American Control Conference, June 1999.
  • Sedwick, R.J., T.L. Hacker and D.W. Miller, "Optimum Aperture Placement for a Space-Based Radar System Using Separated Spacecraft Interferometry", AIAA 99-4271, AIAA Guidance, Navigation, and Control Conference, Portland, OR; August 9-11, 1999.
  • Hacker, T.L. and R.J. Sedwick, "Space-Based GMTI Radar Using Separated Spacecraft Interferometry", AIAA 99-4634, AIAA Space Technology Conference, Albuquerque, NM; Sept 28-30, 1999.
  • Kong, E.M.C., D.W. Miller, and R.J. Sedwick, "Trajectory Design for a Visible Geosynchronous Earth Imager", AIAA-99-4633, AIAA Space Technology Conference, Albuquerque, NM, Sept 28-30, 1999.
  • Jilla, C.D., R.J. Sedwick, and D.W. Miller, "Application of Multidisciplinary Design Optimization Techniques to Distributed Satellite Systems", AIAA-99-4632, AIAA Space Technology Conference, Albuquerque, NM, September 28-30, 1999.
  • Enright, J.P., R.J. Sedwick, and D.W. Miller, "Information Architecture Analysis and Optimization for Space-Based Distributed Radar", AIAA 99-4551, AIAA Space Technology Conference, Albuquerque, NM, September 28-30, 1999.
  • Sedwick, R.J., D.W. Miller and E.M.C. Kong, "Mitigation of Differential Perturbations in Clusters of Formation Flying Satellites", AAS 99-124, AAS Space Flight Mechanics Conference, Breckenridge, CO, February 1998.
  • Sedwick, R.J. and J.L. Kerrebrock, "Developments in Gas Core Nuclear Propulsion Using MHD Driven Vortex Containment,” AIAA 98-3888, AIAA/ASME/SAE/ASEE JPC, 34th Annual meeting, Cleveland, OH, 1998.
  • Sedwick, R.J. and J.L. Kerrebrock "Radiator Free Space Power Conversion," AIAA 98-3889, AIAA/ ASME/SAE/ASEE JPC, 34th Annual meeting, Cleveland, OH, 1998.
  • Sedwick, R.J., E.M.C Kong and D.W. Miller, "Exploiting Orbital Dynamics and Micropropulsion for Aperture Synthesis Using Distributed Satellite Systems: Applications to TechSat 21," AIAA-98-5289, AIAA Defense and Civil Space Program Conference, Huntsville, AL, Oct 28-30, 1998.
  • Sedwick, R.J. and J.L. Kerrebrock, "Radiative Heat Transfer and Ionization In MHD Driven Vortices for a GCNR, " AIAA 97-0792, AIAA Aerospace Sciences Conference, 35th Annual meeting, Reno, NV, 1997.
  • Sedwick, R.J. and J.L. Kerrebrock, "MHD Enhanced Vortex Containment Concept for a Gas Core Nuclear Rocket, " AIAA 96-0718, AIAA Aerospace Sciences Conference, 34th Annual meeting, Reno, NV, 1996.

Honors and Awards 

  • NSF CAREER Award
  • Raymond Bisplinghoff Teaching Fellowship (MIT)
  • NASA MSFC Summer Faculty Fellowship
  • NASA Institute for Advanced Concepts Fellow
  • Bepi Columbo Prize (University of Padua, Italy)
  • AIAA (UMD Chapter) Best Mentor Award (2009-2010, 2010-2011)
  • AIAA (UMD Chapter) AIAA Best Professor Award (2012-2013, 2013-2014)
  • AIAA (UMD Chapter) Broken Propeller Award (2014-2015)
     

Professional Memberships 

  • American Institute of Aeronautics and Astronautics (AIAA) Associate Fellow
  • Institute of Electrical and Electronics Engineers (IEEE) Senior Member
  • American Astronautical Society (AAS)
  • American Physical Society (APS)

  • American Society for Engineering Education (ASEE)

Professional Services

  • Reviewer for: AIAA Journal of Guidance Control and Dynamics, AIAA Journal of Spacecraft and Rockets, AIAA Journal of Propulsion and Power, Journal of Astronautical Sciences.
  • Associate Editor, AIAA Journals of Spacecraft and Rockets
  • Vice Chair, AIAA Nuclear and Future Flight Technical Committee
  • Deputy Director for Education, AIAA Region I

Consulting

  • Payload Systems
  • NASA Goddard Space Flight Center
  • Lockheed Martin Corporation
  • Axis Engineering Technologies
  • AeroAstro
  • Draper Laboratories

Related News 

Shrestha and DeVries Win 2014 Graduate Student Research Awards Competition

Elena Shrestha and Levi DeVries win Department of Aerospace Engineering Graduate Student Research Awards Competition. May 8, 2014

UMD Propulsion Technology Offers New Possibilities for Satellite Positioning, Space Exploration

Electromagnetic propulsion could exponentially expand satellite capabilities by providing a propellant-less formation flight technology. August 13, 2013

Jones and Sedwick Win DURIP Instrumentation Awards

Two Aerospace faculty members won Defense University Research Instrumentation Program (DURIP). June 14, 2012

Two Aero Faculty Selected as Associate AIAA Fellows

AIAA Membership Upgrades for Flatau and Sedwick September 22, 2009

Sedwick interviewed on WUSA9

WUSA 9 featured Dr. Sedwick on a recent segment on satellites February 28, 2008

Dr. Sedwick joins aerospace faculty

Dr. Ray Sedwick joins the aerospace faculty in Fall 2007 August 21, 2007