PTYS/LPL Faculty

Joe Giacalone


  • Eileen Chollet, 2008 (PTYS)
  • Fan Guo, 2012 (PTYS)
  • Thomas Schad, 2013 (PTYS)


  • David Smith
  • Vincent Luo
  • Federico Fraschetti
Joe Giacalone
Professor, Assistant Department Head
Solar and heliospheric physics, Astrophysics, Theoretical astrophysics
Ph.D. 1991, University of Kansas

Kuiper   #411

Years with LPL:  1993 to present


Dr. Giacalone’s core research interests include understanding the origin, acceleration, and propagation of cosmic rays, and other charged-particle species in the magnetic fields of space, and general topics in space plasma physics, and astrophysics.

He develops physics-based theoretical and computational models which are used to interpret in situ spacecraft observations. He is interested in the general properties of solar, interplanetary, and galactic magnetic fields.

Currently, he is studying the origin of large solar-energetic particle events (a.k.a. solar cosmic rays) which involves a number of diverse aspects of solar physics and space physics. He has written papers describing the propagation of solar-flare particles from the Sun to the Earth where they are observed by spacecraft such as ACE, Ulysses, Wind, etc.

He is also interested in the general topic of particle acceleration in astrophysical plasmas.

CV for Dr. Giacalone (PDF)


  • Energetic Charged Particles in the Heliosphere: Are Observations Consistent with Acceleration by Shocks? NASA Heliophysics Theory program
  • Integrated Science Investigation of the Sun: NASA's Solar Probe Plus mission; Co-Investigator, member of the Theory and Modeling team
  • Sun to Ice: Impacts on Earth of Extreme Solar Events: NSF's Frontiers in Earth-System Dynamics program
  • SHINE: Observations and modeling of the longitudinal extent and variation of Multi-Spacecraft Solar Energetic Particle Events: National Science Foundation's SHINE program


Solar Probe Plus
Advanced Composition Explorer
Voyagers 1 & 2




NASA ADS Author search: Joe Giacalone


Guo, F., Giacalone, J. Small-scale Gradients of Charged Particles in the Heliospheric Magnetic Field 2014ApJ...780...16G

Tessein, J. A., et al. Association of Suprathermal Particles with Coherent Structures and Shocks 2013ApJ...776L...8T

Guo, F., Giacalone, J. The Acceleration of Thermal Protons at Parallel Collisionless Shocks: Three-dimensional Hybrid Simulations 2013ApJ...773..158G

Giacalone, J. Energetic Charged Particles Associated with Strong Interplanetary Shocks 2012ApJ...761...28G

Lee, M. A., Mewaldt, R. A., Giacalone, J. Shock Acceleration of Ions in the Heliosphere 2012SSRv..tmp...81L

Fraschetti, F., Giacalone, J. Early-time Velocity Autocorrelation for Charged Particles Diffusion and Drift in Static Magnetic Turbulence 2012ApJ...755..114F

Giacalone, J., Drake, J. F., Jokipii, J. R.The Acceleration Mechanism of Anomalous Cosmic Rays 2012SSRv..tmp...62G

Guo, F., Giacalone, J. Particle Acceleration at a Flare Termination Shock: Effect of Large-scale Magnetic Turbulence 2012ApJ...753...28G

Giacalone, J., Jokipii, J. R. The Longitudinal Transport of Energetic Ions from Impulsive Solar Flares in Interplanetary Space 2012ApJ...751L..33G

Guo, F., et al. On the Amplification of Magnetic Field by a Supernova Blast Shock Wave in a Turbulent Medium 2012ApJ...747...98G

Giacalone, J. Cosmic-Ray Transport and Interaction with Shocks 2011SSRv..tmp...33G

Chollet, E. E., Giacalone, J. Evidence of Confinement of Solar-energetic Particles to Interplanetary Magnetic Field Lines 2011ApJ...728...64C

Giacalone, J., Burgess, D. Interaction between inclined current sheets and the heliospheric termination shock 2010GeoRL..3719104G

Hsieh, K. C., et al. Thickness of the Heliosheath, Return of the Pick-up Ions, and Voyager 1's Crossing the Heliopause 2010ApJ...718L.185H

Chollet, E. E., Giacalone, J., Mewaldt, R. A. Effects of interplanetary transport on derived energetic particle source strengths 2010JGRA..11506101C

Guo, F., Giacalone, J. The Effect of Large-scale Magnetic Turbulence on the Acceleration of Electrons by Perpendicular Collisionless Shocks 2010ApJ...715..406G

Chollet, E., et al. Reconnection and Disconnection: Observations of Suprathermal Electron Heat Flux Dropouts 2010AIPC.1216..600C

Neugebauer, M., Giacalone, J. Progress in the Study of Interplanetary Discontinuities 2010AIPC.1216..194N

Giacalone, J., Decker, R. The Origin of Low-energy Anomalous Cosmic Rays at the Solar-wind Termination Shock 2010ApJ...710...91G

Chollet, E. E., et al. Spatial Offsets of Interplanetary Ion and Electron Source Regions 2009ApJ...705.1492C

Giacalone, J., Jokipii, J. R. The Acceleration of Stationary Charged Dust Grains by Propagating Collisionless Shock Waves 2009ApJ...701.1865G

Hsieh, K. C., et al. A Re-Interpretation of STEREO/STE Observations and Its Consequences 2009ApJ...694L..79H

Chollet, E. E., Giacalone, J. Multispacecraft Analysis of Energetic Ion Flux Dropouts 2008ApJ...688.1368C

Giacalone, J., Neugebauer, M. The Energy Spectrum of Energetic Particles Downstream of Turbulent Collisionless Shocks 2008ApJ...673..629G

Jokipii, J. R., Giacalone, J., Kóta, J. The physics of particle acceleration at the heliospheric termination shock 2007P&SS...55.2267J

Chollet, E. E., et al. A New Phenomenon in Impulsive-Flare-Associated Energetic Particles 2007ApJ...669..615C

Roberts, D. A., et al. Spectra of polar heliospheric fields and implications for field structure 2007JGRA..11208103R

Giacalone, J., Jokipii, J. R. Magnetic Field Amplification by Shocks in Turbulent Fluids 2007ApJ...663L..41G

Jokipii, J. R., Giacalone, J. Compression Acceleration of Fast Charged Particles 2007ApJ...660..336J

Neugebauer, M., et al. Variability of low-energy ion flux profiles on interplanetary shock fronts 2006JGRA..11112107N

Giacalone, J., Jokipii, J. R. Shock Acceleration of High-Energy Cosmic Rays: The Importance of the Magnetic-Field Angle 2006JPhCS..47..160G

Giacalone, J., Jokipii, J. R. Energetic Particle Intensities and Anisotropies near the Solar Wind Termination Shock 2006ApJ...649L.137G

Della-Giustina, D. N., et al. Induction Heating in Asteroids Part 1: Observations and Theory 2006M&PSA..41.5380D

Marsh, C. A., et al. Induction Heating in Asteroids Part 2: Experimental Analogs 2006M&PSA..41.5318M

Giacalone, J., Kóta, J. Acceleration of Solar-Energetic Particles by Shocks 2006SSRv..124..277G

Giacalone, J., Jokipii, J. R., Matthaeus, W. H. Structure of the Turbulent Interplanetary Magnetic Field 2006ApJ...641L..61G

Pei, C., Jokipii, J. R., Giacalone, J. Effect of a Random Magnetic Field on the Onset Times of Solar Particle Events 2006ApJ...641.1222P

Neugebauer, M., Giacalone, J. Multispacecraft observations of interplanetary shocks: Nonplanarity and energetic particles 2005JGRA..11012106N

Giacalone, J. The Efficient Acceleration of Thermal Protons by Perpendicular Shocks 2005ApJ...628L..37G

Giacalone, J. Particle Acceleration at Shocks Moving through an Irregular Magnetic Field 2005ApJ...624..765G

Giacalone, J. Jupiter The planet, satellites and magnetosphere, edited by Fran Bagenal, Timothy E. Dowling, and William McKinnon 2005M&PS...40..329G

Giacalone, J., Jokipii, J. R. Magnetic Footpoint Diffusion at the Sun and Its Relation to the Heliospheric Magnetic Field 2004ApJ...616..573G

Jokipii, J. R., Giacalone, J. Radial Streaming Anisotropies of Charged Particles Accelerated at the Solar Wind Termination Shock 2004ApJ...605L.145J

Lembege, B., et al. Selected Problems in Collisionless-Shock Physics 2004SSRv..110..161L

Giacalone, J. The physics of particle acceleration by collisionless shocks 2003P&SS...51..659G

Zhang, M., et al. Ulysses observations of solar energetic particles from the 14 July 2000 event at high heliographic latitudes 2003JGRA..108.1154Z

Giacalone, J., Jokipii, J. R., Kóta, J. Particle Acceleration in Solar Wind Compression Regions 2002ApJ...573..845G

Giacalone, J. The latitudinal transport of energetic particles associated with corotating interaction regions 2001JGR...10615881G

Giacalone, J., Jokipii, J. R. The transport of energetic particles and cosmic rays in the heliosphere 2001AdSpR..27..461G

Giacalone, J., Ellison, D. C. Three-dimensional numerical simulations of particle injection and acceleration at quasi-perpendicular shocks 2000JGR...10512541G

Mazur, J. E., et al. Interplanetary Magnetic Field Line Mixing Deduced from Impulsive Solar Flare Particles 2000ApJ...532L..79M

Giacalone, J., Jokipii, J. R., Mazur, J. E. Small-scale Gradients and Large-scale Diffusion of Charged Particles in the Heliospheric Magnetic Field 2000ApJ...532L..75G

Scholer, M., Kucharek, H., Giacalone, J. Cross-field diffusion of charged particles and the problem of ion injection and acceleration at quasi-perpendicular shocks 2000JGR...10518285S

Giacalone, J., Jokipii, J. R. The Transport of Cosmic Rays across a Turbulent Magnetic Field 1999ApJ...520..204G

Giacalone, J. Particle transport and acceleration at corotating interaction regions. 1999AdSpR..23..581G

Giacalone, J. Cosmic-Ray Transport Coefficients 1998SSRv...83..351G

Klecker, B., et al. Anomalous Cosmic Rays 1998SSRv...83..259K

Jokipii, J. R., Giacalone, J. The Theory of Anomalous Cosmic Rays 1998SSRv...83..123J

Giacalone, J., et al. Injection and acceleration of thermal protons at quasi-parallel shocks: A hybrid simulation parameter survey 1997JGR...10219789G

Giacalone, J., et al. Preacceleration of Anomalous Cosmic Rays in the Inner Heliosphere 1997ApJ...486..471G

Giacalone, J., Jokipii, J. R. Spatial variation of accelerated pickup ions at co-rotating interaction regions 1997GeoRL..24.1723G

Jokipii, J. R., Giacalone, J. The Acceleration of Pickup Ions 1996SSRv...78..137J

Giacalone, J., Jokipii, J. R. Perpendicular transport in shock Acceleration 1996JGR...10111095G

Jokipii, J. R., et al. Interpretation and consequences of large-scale magnetic variances observed at high heliographic latitude 1995GeoRL..22.3385J

Giacalone, J. On the cross-field diffusion of ions in one- and two-dimensional hybrid simulations of collisionless shocks 1994GeoRL..21.2441G

Giacalone, J., Jokipii, J. R., Kota, J. Ion injection and acceleration at quasi-perpendicular shocks 1994JGR....9919351G

Giacalone, J., Jokipii, J. R. Charged-particle motion in multidimensional magnetic-field turbulence 1994ApJ...430L.137G

Giacalone, J., Schwartz, S. J., Burgess, D. Artificial spacecraft in hybrid simulations of the quasi-parallel Earth's bow shock: Analysis of time series versus spatial profiles and a separation strategy for Cluster 1994AnGeo..12..591G

Gloeckler, G., et al. Concentration of interstellar pickup H(+) and He(+) in the solar wind 1994GeoRL..21.1565G

Jokipii, J. R., Kota, J., Giacalone, J. Perpendicular transport in 1- and 2-dimensional shock simulations 1993GeoRL..20.1759J

Giacalone, J., Schwartz, S. J., Burgess, D. Observations of suprathermal ions in association with SLAMS 1993GeoRL..20..149G

Giacalone, J., et al. Ion injection and acceleration at parallel shocks - Comparisons of self-consistent plasma simulations with existing theories 1993ApJ...402..550G

Giacalone, J. Shock drift acceleration of energetic protons at a planetary bow shock 1992JGR....97.8307G

Giacalone, J., et al. Hybrid simulations of protons strongly accelerated by a parallel collisionless shock 1992GeoRL..19..433G

Giacalone, J., Armstrong, T. P., Decker, R. B. Effect of magnetic overshoot on shock drift acceleration 1991JGR....96.3621G

Giacalone, J. Ph.D. Proton Acceleration in Structured Collisionless Shock Waves 1991PhDT........40G

Winske, D., et al. A comparative study of plasma heating by ion acoustic and modified two-stream instabilities at subcritical quasi-perpendicular shocks 1987JGR....92.4411W