George Clark Print



:   Space Physicist

:  Planetary, Heliophysics


Degree Field of Study Year Attained Institution Name
B.Sc. Physics 2009 University of New Hampshire
Ph.D. Physics 2014 University of Texas at San Antonio

George Clark is a research scientist studying the physics of magnetospheric and auroral plasma phenomena in the magnetospheres of the outer solar system. He specializes in the analysis and interpretations of spacecraft data from missions such as Juno, Cassini and Galileo and many more. One of his recent and more notable discoveries is the presence of mega-volt electric potentials over Jupiter’s polar cap region – a phenomena that accelerates ions to very high-energies into Jupiter’s upper atmosphere. George is a science team member of the Juno mission as well as the Jupiter Energetic particle Detector Instrument (JEDI). He is also the instrument scientist of JUipiter ICy moon Explorer’s (JUICE’s) Jovian Energetic Electron (JoEE) sensor and instrument scientist of the high-energy energetic neutral atom imager onboard the Interstellar Mapping and Acceleration Probe (IMAP-Ultra). He was a guest-investigator on JAXA’s Hisaki mission and a part of an International Space Science Institute (ISSI) team studying Jupiter’s magnetosphere. George has also mentored serval high school and undergraduate students as a part of APL’s summer intern program.

AGU Index Category AGU Index Sub-Category
MAGNETOSPHERIC PHYSICS Planetary magnetospheres
MAGNETOSPHERIC PHYSICS Magnetosphere/ionosphere interactions
SPACE PLASMA PHYSICS Instruments and techniques
Start Year End Year Description
2005 2009 Research Assistant, University of New Hampshire
2009 2014 Graduate Research Assistant, Southwest Research Institute
2014 2015 Postdoctoral Researcher, NASA Goddard Space Flight Center
2015 Current Senior Professional Staff, Johns Hopkins University Applied Physics Laboratory
Year Description
2008 - Present American Geophysical Union
2018 Group Achievement Award – Juno Jupiter Orbit Insertion Team
2018 Group Achievement Award – Juno Mission Re-Design Team
2016 European Space Agency Award – Outstanding contribution to ESA Rosetta Mission
2008, 2009 UNH, Undergraduate Excellence in Research
The following publication information was downloaded from

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T. W. Broiles, G. Livadiotis, J. L. Burch, K. Chae, G. Clark, T. E. Cravens, R. Davidson, A. Eriksson, R. A. Frahm, S. A. Fuselier, J. Goldstein, R. Goldstein, P. Henri, H. Madanian, K. Mandt, P. Mokashi, C. Pollock, A. Rahmati, M. Samara, S. J. Schwartz, (2016), Characterizing cometary electrons with kappa distributions, Journal of Geophysical Research-Space Physics, 121, 7407-7422

G. Clark, F. Allegrini, D. J. McComas, P. Louarn, (2016), Modeling the response of a top hat electrostatic analyzer in an external magnetic field: Experimental validation with the Juno JADE-E sensor, Journal of Geophysical Research-Space Physics, 121, 5121-5136

G. Clark, I. Cohen, J. H. Westlake, G. B. Andrews, P. Brandt, R. E. Gold, M. A. Gkioulidou, R. Hacala, D. Haggerty, M. E. Hill, G. C. Ho, S. E. Jaskulek, P. Kollmann, B. H. Mauk, R. L. McNutt, D. G. Mitchell, K. S. Nelson, C. Paranicas, N. Paschalidis, C. E. Schlemm, (2016), The "Puck" energetic charged particle detector: Design, heritage, and advancements, Journal of Geophysical Research-Space Physics, 121, 7900-7913

G. Clark, B. H. Mauk, C. Paranicas, P. Kollmann, H. T. Smith, (2016), Charge states of energetic oxygen and sulfur ions in Jupiter's magnetosphere, Journal of Geophysical Research-Space Physics, 121, 2264-2273

P. Kollmann, C. Paranicas, G. Clark, E. Roussos, A. Lagg, N. Krupp, (2016), The vertical thickness of Jupiter's Europa gas torus from charged particle measurements, Geophysical Research Letters, 43, 9425-9433

B. Lavraud, Y. C. Zhang, Y. Vernisse, D. J. Gershman, J. Dorelli, P. A. Cassak, J. Dargent, C. Pollock, B. Giles, N. Aunai, M. Argall, L. Avanov, A. Barrie, J. Burch, M. Chandler, L. -J. Chen, G. Clark, I. Cohen, V. Coffey, J. P. Eastwood, J. Egedal, S. Eriksson, R. Ergun, C. J. Farrugia, S. A. Fuselier, V. Genot, D. Graham, E. Grigorenko, H. Hasegawa, C. Jacquey, I. Kacem, Y. Khotyaintsev, E. MacDonald, W. Magnes, A. Marchaudon, B. Mauk, T. E. Moore, T. Mukai, R. Nakamura, W. Paterson, E. Penou, T. D. Phan, A. Rager, A. Retino, Z. J. Rong, C. T. Russell, Y. Saito, J. -A. Sauvaud, S. J. Schwartz, C. Shen, S. Smith, R. Strangeway, S. Toledo-Redondo, R. Torbert, D. L. Turner, S. Wang, S. Yokota, (2016), Currents and associated electron scattering and bouncing near the diffusion region at Earth's magnetopause, Geophysical Research Letters, 43, 3042-3050

H. Madanian, T. E. Cravens, A. Rahmati, R. Goldstein, J. Burch, A. I. Eriksson, N. J. T. Edberg, P. Henri, K. Mandt, G. Clark, M. Rubin, T. Broiles, N. L. Reedy, (2016), Suprathermal electrons near the nucleus of comet 67P/Churyumov-Gerasimenko at 3AU: Model comparisons with Rosetta data, Journal of Geophysical Research-Space Physics, 121, 5815-5836

J. H. Westlake, D. G. Mitchell, P. C-son Brandt, B. G. Andrews, G. Clark, (2016), The Low-Energy Neutral Imager (LENI), Journal of Geophysical Research-Space Physics, 121, 8228-8236

G. Clark, T. W. Broiles, J. L. Burch, G. A. Collinson, T. Cravens, (2015), Suprathermal electron environment of comet 67P/Churyumov-Gerasimenko: Observations from the Rosetta Ion and Electron Sensor, ,

R. Goldstein, J. L. Burch, P. Mokashi, T. Broiles, K. Mandt, J. Hanley, T. Cravens, A. Rahmati, M. Samara, G. Clark, M. Haessig, J. M. Webster, (2015), The Rosetta Ion and Electron Sensor (IES) measurement of the development of pickup ions from comet 67P/Churyumov-Gerasimenko, Geophysical Research Letters, 42, 3093-3099

T. I. Gombosi G. Clark P. Mokashi R. Goldstein J L Burch, (2015), Observation of charged nanograins at comet 67P/Churyumov-Gerasimenko, , 1-7,

J. L. Burch, T. I. Gombosi, G. Clark, P. Mokashi, R. Goldstein, (2015), Observation of charged nanograins at comet 67P/Churyumov-Gerasimenko, Geophysical Research Letters, 42, 6575-6581

G. Clark, C. Paranicas, D. Santos-Costa, S. Livi, N. Krupp, D. G. Mitchell, E. Roussos, W. -L. Tseng, (2014), Evolution of electron pitch angle distributions across Saturn's middle magnetospheric region from MIMI/LEMMS, Planetary and Space Science, 104, 18-28

G. Clark, F. Allegrini, B. M. Randol, D. J. McComas, P. Louarn, (2013), Response in electrostatic analyzers due to backscattered electrons: Case study analysis with the Juno Jovian Auroral Distribution Experiment-Electron instrument, Review of Scientific Instruments, 84

D. J. McComas, N. Alexander, F. Allegrini, F. Bagenal, C. Beebe, G. Clark, F. Crary, M. I. Desai, A. De Los Santos, D. Demkee, J. Dickinson, D. Everett, T. Finley, A. Gribanova, R. Hill, J. Johnson, C. Kofoed, C. Loeffler, P. Louarn, M. Maple, W. Mills, C. Pollock, M. Reno, B. Rodriguez, J. Rouzaud, D. Santos-Costa, P. Valek, S. Weidner, P. Wilson, R. J. Wilson, D. White, (2013), The Jovian Auroral Distributions Experiment (JADE) on the Juno Mission to Jupiter, Space Science Reviews, 1-97,

M. Hlond, M. Bzowski, E. Moebius, H. Kucharek, D. Heirtzler, N. A. Schwadron, M. E. O' Neill, G. Clark, G. B. Crew, S. Fuselier, D. J. McComas, (2012), PRECISION POINTING OF IBEX-Lo OBSERVATIONS, Astrophysical Journal Supplement Series, 198

S. A. Fuselier, P. Bochsler, D. Chornay, G. Clark, G. B. Crew, G. Dunn, S. Ellis, T. Friedmann, H. O. Funsten, A. G. Ghielmetti, J. Googins, M. S. Granoff, J. W. Hamilton, J. Hanley, D. Heirtzler, E. Hertzberg, D. Isaac, B. King, U. Knauss, H. Kucharek, F. Kudirka, S. Livi, J. Lobell, S. Longworth, K. Mashburn, D. J. McComas, E. Moebius, A. S. Moore, T. E. Moore, R. J. Nemanich, J. Nolin, M. O'Neal, D. Piazza, L. Peterson, S. E. Pope, P. Rosmarynowski, L. A. Saul, J. R. Scherrer, J. A. Scheer, C. Schlemm, N. A. Schwadron, C. Tillier, S. Turco, J. Tyler, M. Vosbury, M. Wieser, P. Wurz, S. Zaffke, (2009), The IBEX-Lo Sensor, Space Science Reviews, 146, 117-147

E. Moebius, H. Kucharek, G. Clark, M. O'Neill, L. Petersen, M. Bzowski, L. Saul, P. Wurz, S. A. Fuselier, V. V. Izmodenov, D. J. McComas, H. R. Mueller, D. B. Alexashov, (2009), Diagnosing the Neutral Interstellar Gas Flow at 1 AU with IBEX-Lo, Space Science Reviews, 146, 149-172