Publications

Hamish A. S. Reid, Sophie Musset, Daniel F. Ryan et al, The Solar Particle Acceleration Radiation and Kinetics (SPARK) Mission Concept Aerospace, 10, 1034, 2023. DOI .

C. O. G. Waterfall, S. Dalla, M. S. Marsh et al, Forecasting >300 MeV SEP Events: Extending SPARX to High Energies Space Weather, 21, e2023SW003445, 2023. DOI .

T. Laitinen, S. Dalla, C. O. G. Waterfall et al, Solar energetic particle event onsets at different heliolongitudes: The effect of turbulence in Parker spiral geometry A&A, 673, L8, 2023. DOI .

A. Hutchinson, S. Dalla, T. Laitinen et al, Modelling shock-like injections of solar energetic particles with 3D test particle simulations A&A, 670, A178, 2023. DOI .

A. Hutchinson, S. Dalla, T. Laitinen et al, Impact of corotation on gradual solar energetic particle event intensity profiles A&A, 670, L24, 2023. DOI .

T. Laitinen, S. Dalla, C. O. G. Waterfall et al, An Analytical Model of Turbulence in Parker Spiral Geometry and Associated Magnetic Field Line Lengths ApJ, 943, 108, 2023. DOI .

Charlotte O. G. Waterfall, Silvia Dalla, Timo Laitinen et al, Modeling the Transport of Relativistic Solar Protons along a Heliospheric Current Sheet during Historic GLE Events ApJ, 934, 82, 2022. DOI .

A. Hutchinson, S. Dalla, T. Laitinen et al, Energetic proton back-precipitation onto the solar atmosphere in relation to long-duration gamma-ray flares A&A, 658, A23, 2022. DOI .

A. Kollhoff, A. Kouloumvakos, D. Lario et al, The first widespread solar energetic particle event observed by Solar Orbiter on 2020 November 29 A&A, 656, A20, 2021. DOI .

T. Laitinen, S. Dalla Access of Energetic Particles to a Magnetic Flux Rope from External Magnetic Field Lines ApJ, 906, 9, 2021. DOI .

R. D. Strauss, J. P. van den Berg, P. J. Steyn et al, Perpendicular diffusion of solar energetic particles: When is the diffusion approximation valid? Journal of Physics Conference Series, 1620, 012021, 2020. DOI .

S. Dalla, G. A. de Nolfo, A. Bruno et al, 3D propagation of relativistic solar protons through interplanetary space A&A, 639, A105, 2020. DOI .

Leon Kocharov, Melissa Pesce-Rollins, Timo Laitinen et al, Interplanetary Protons versus Interacting Protons in the 2017 September 10 Solar Eruptive Event ApJ, 890, 13, 2020. DOI .

T. Laitinen, S. Dalla From Sun to Interplanetary Space: What is the Pathlength of Solar Energetic Particles? ApJ, 887, 222, 2019. DOI .

S. Dalla, B. Swalwell, M. Battarbee et al, Application of Test Particle Simulations to Solar Energetic Particle Forecasting Space Weather of the Heliosphere: Processes and Forecasts, 335, 268-271, 2018. DOI .

T. Laitinen, S. Dalla, M. Battarbee et al, Forecasting Solar Energetic Particle Fluence with Multi-Spacecraft Observations Space Weather of the Heliosphere: Processes and Forecasts, 335, 298-300, 2018. DOI .

Timo Laitinen, Frederic Effenberger, Andreas Kopp et al, The effect of turbulence strength on meandering field lines and Solar Energetic Particle event extents Journal of Space Weather and Space Climate, 8, A13, 2018. DOI .

T. Laitinen, S. Dalla, D. Marriott Early propagation of energetic particles across the mean field in turbulent plasmas MNRAS, 470, 3149-3158, 2017. DOI .

Leon Kocharov, Silja Pohjolainen, Alexander Mishev et al, Investigating the Origins of Two Extreme Solar Particle Events: Proton Source Profile and Associated Electromagnetic Emissions ApJ, 839, 79, 2017. DOI .

S. Dalla, M. S. Marsh, P. Zelina et al, Time dependence of Fe/O ratio within a 3D solar energetic particle propagation model including drift A&A, 598, A73, 2017. DOI .

T. Laitinen, S. Dalla Energetic Particle Transport across the Mean Magnetic Field: Before Diffusion ApJ, 834, 127, 2017. DOI .

T. Laitinen, A. Kopp, F. Effenberger et al, Solar energetic particle access to distant longitudes through turbulent field-line meandering A&A, 591, A18, 2016. DOI .

S. Dalla, M. S. Marsh, T. Laitinen Drift-induced Deceleration of Solar Energetic Particles ApJ, 808, 62, 2015. DOI .

T. Laitinen, K. Huttunen-Heikinmaa, E. Valtonen et al, Correcting for Interplanetary Scattering in Velocity Dispersion analysis of Solar Energetic Particles ApJ, 806, 114, 2015. DOI .

L. Kocharov, T. Laitinen, R. Vainio et al, Solar Interacting Protons Versus Interplanetary Protons in the Core Plus Halo Model of Diffusive Shock Acceleration and Stochastic Re-acceleration ApJ, 806, 80, 2015. DOI .

M. S. Marsh, S. Dalla, M. Dierckxsens et al, SPARX: A modeling system for Solar Energetic Particle Radiation Space Weather forecasting Space Weather, 13, 386-394, 2015. DOI .

Leon Kocharov, Timo Laitinen, Ilya Usoskin et al, Transmission and Emission of Solar Energetic Particles in Semi-transparent Shocks ApJl, 787, L21, 2014. DOI .

Rami Vainio, Arttu P\"onni, Markus Battarbee et al, A semi-analytical foreshock model for energetic storm particle events inside 1 AU Journal of Space Weather and Space Climate, 4, A08, 2014. DOI .

Leon Kocharov, Timo Laitinen, Rami Vainio The Effect of Turbulence Intermittence on the Emission of Solar Energetic Particles by Coronal and Interplanetary Shocks ApJl, 778, L5, 2013. DOI .

M. Battarbee, R. Vainio, T. Laitinen et al, Injection of thermal and suprathermal seed particles into coronal shocks of varying obliquity A&A, 558, A110, 2013. DOI .

S. Dalla, M. S. Marsh, J. Kelly et al, Solar energetic particle drifts in the Parker spiral Journal of Geophysical Research (Space Physics), 118, 5979-5985, 2013. DOI .

M. S. Marsh, S. Dalla, J. Kelly et al, Drift-induced Perpendicular Transport of Solar Energetic Particles ApJ, 774, 4, 2013. DOI .

T. Laitinen, S. Dalla, M. S. Marsh Energetic Particle Cross-field Propagation Early in a Solar Event ApJl, 773, L29, 2013. DOI .

S. Lange, F. Spanier, M. Battarbee et al, Particle scattering in turbulent plasmas with amplified wave modes A&A, 553, A129, 2013. DOI .

T. Laitinen, S. Dalla, J. Kelly et al, Energetic Particle Diffusion in Critically Balanced Turbulence ApJ, 764, 168, 2013. DOI .

J. Kelly, S. Dalla, T. Laitinen Test-particle simulations of SEP propagation in IMF with large-scale fluctuations Space Weather: the Space Radiation Environment: 11th Annual International AstroPhysics Conference, 1500, 109-114, 2012. DOI .

J. Kelly, S. Dalla, T. Laitinen Cross-field Transport of Solar Energetic Particles in a Large-scale Fluctuating Magnetic Field ApJ, 750, 47, 2012. DOI .

T. Laitinen, S. Dalla, J. Kelly Energetic Particle Diffusion in Structured Turbulence ApJ, 749, 103, 2012. DOI .

M. Battarbee, T. Laitinen, R. Vainio Heavy-ion acceleration and self-generated waves in coronal shocks A&A, 535, A34, 2011. DOI .

M. Aguilar, J. Alcaraz, J. Allaby et al, Isotopic Composition of Light Nuclei in Cosmic Rays: Results from AMS-01 ApJ, 736, 105, 2011. DOI .

M. Aguilar, J. Alcaraz, J. Allaby et al, Relative Composition and Energy Spectra of Light Nuclei in Cosmic Rays: Results from AMS-01 ApJ, 724, 329-340, 2010. DOI .

T. Laitinen, K. Huttunen-Heikinmaa, E. Valtonen On the Effect of Pre-event Background in Determining Solar Particle Event Onset Twelfth International Solar Wind Conference, 1216, 249-252, 2010. DOI .

M. Battarbee, T. Laitinen, R. Vainio et al, Acceleration of Energetic Particles Through Self-Generated Waves in a Decelerating Coronal Shock Twelfth International Solar Wind Conference, 1216, 84-87, 2010. DOI .

L. Kocharov, T. Laitinen, A. Al-Sawad et al, Gradual Solar Energetic Particle Event Associated with a Decelerating Shock Wave ApJl, 700, L51-L55, 2009. DOI .

Robert F. Wimmer-Schweingruber, Ralph McNutt, Nathan A. Schwadron et al, Interstellar heliospheric probe/heliospheric boundary explorer mission\textemdasha mission to the outermost boundaries of the solar system Experimental Astronomy, 24, 9-46, 2009. DOI .

A. Al-Sawad, O. Saloniemi, T. Laitinen et al, Observation of a solar energetic particle event behind previous coronal mass ejection A&A, 497, L1-L4, 2009. DOI .

Robert F. Wimmer-Schweingruber, Ralph McNutt The Interstellar Heliopause Probe: Heliospheric Boundary Explorer Mission to the Interstellar Medium Earth Moon and Planets, 104, 17-24, 2009. DOI .

R. Vainio, T. Laitinen Simulations of coronal shock acceleration in self-generated turbulence Journal of Atmospheric and Solar-Terrestrial Physics, 70, 467-474, 2008. DOI .

R. Vainio, T. Laitinen Turbulence transport and shock acceleration in solar corona Turbulence and Nonlinear Processes in Astrophysical Plasmas, 932, 350-355, 2007. DOI .

R. Vainio, T. Laitinen Monte Carlo Simulations of Coronal Diffusive Shock Acceleration in Self-generated Turbulence ApJ, 658, 622-630, 2007. DOI .

AMS-01 Collaboration, M. Aguilar, J. Alcaraz et al, Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01 Physics Letters B, 646, 145-154, 2007. DOI .

K. Huttunen-Heikinmaa, E. Valtonen, T. Laitinen Proton and helium release times in SEP events observed with SOHO/ERNE A&A, 442, 673-685, 2005. DOI .

M. Aguilar, J. Alcaraz, J. Allaby et al, A study of cosmic ray secondaries induced by the Mir space station using AMS-01 Nuclear Instruments and Methods in Physics Research B, 234, 321-332, 2005. DOI .

Leon Kocharov, Marianna Lytova, Rami Vainio et al, Modeling the Shock Aftermath Source of Energetic Particles in the Solar Corona ApJ, 620, 1052-1068, 2005. DOI .

E. Valtonen, T. Laitinen, K. Huttunen-Heikinmaa Energetic particle signatures of geoeffective coronal mass ejections Advances in Space Research, 36, 2295-2302, 2005. DOI .

T. . Laitinen A Simple Model for Reflection-Driven Spectral Evolution of Turbulence in the Corona and Inner Heliosphere Astrophysics and Space Sciences Transactions, 1, 35-43, 2005. DOI .

T. Laitinen, R. Vainio, H. Fichtner On the acceleration and wave heating of the solar wind: implications of the mean free path of solar energetic particles Solar Wind Ten, 679, 303-306, 2003. DOI .

R. Vainio, T. Laitinen, H. Fichtner A simple analytical expression for the power spectrum of cascading Alfv\'en waves in the solar wind A&A, 407, 713-723, 2003. DOI .

T. Laitinen, H. Fichtner, R. Vainio Toward a self-consistent treatment of the cyclotron wave heating and acceleration of the solar wind plasma Journal of Geophysical Research (Space Physics), 108, 1081, 2003. DOI .

T. Laitinen, R. Vainio Shock acceleration of energetic particles in wave heated corona Advances in Space Research, 32, 2603-2608, 2003. DOI .

AMS Collaboration, M. Aguilar, J. Alcaraz et al, The Alpha Magnetic Spectrometer (AMS) on the International Space Station: Part I - results from the test flight on the space shuttle Phys. Rep., 366, 331-405, 2002. DOI .

J. Alcaraz, B. Alpat, G. Ambrosi et al, The Alpha Magnetic Spectrometer (AMS) Nuclear Instruments and Methods in Physics Research A, 478, 119-122, 2002. DOI .

R. Vainio, T. Laitinen The relation between cyclotron heating and energetic particles on open coronal field lines A&A, 371, 738-747, 2001. DOI .

AMS Collaboration, J. Alcaraz, B. Alpat et al, Helium in near Earth orbit Physics Letters B, 494, 193-202, 2000. DOI .

J. Alcaraz, B. Alpat, G. Ambrosi et al, Cosmic protons Physics Letters B, 490, 27-35, 2000. DOI .

T. Laitinen, K. -L. Klein, L. Kocharov et al, Solar energetic particle event and radio bursts associated with the 1996 July 9 flare and coronal mass ejection A&A, 360, 729-741, 2000. .

J. Alcaraz, B. Alpat, G. Ambrosi et al, Leptons in near earth orbit Physics Letters B, 484, 10-22, 2000. DOI .

R. Vainio, L. Kocharov, T. Laitinen Interplanetary and Interacting Protons Accelerated in a Parallel Shock Wave ApJ, 528, 1015-1025, 2000. DOI .

J. Alcaraz, D. Alvisi, B. Alpat et al, Protons in near earth orbit Physics Letters B, 472, 215-226, 2000. DOI .

Leon Kocharov, Jarmo Torsti, Timo Laitinen et al, Post-Impulsive-Phase Acceleration in a Wide Range of Solar Longitudes Sol. Phys., 190, 295-307, 1999. DOI .

J. Alcaraz, B. Alpat, G. Ambrosi et al, A silicon microstrip tracker in space: experience with the AMS silicon tracker on STS-91. Nuovo Cimento A Serie, 112A, 1325-1343, 1999. DOI .

J. Alcaraz, D. Alvisi, B. Alpat et al, Search for antihelium in cosmic rays. Physics Letters B, 461, 387-396, 1999. DOI .

L. Kocharov, G. A. Kovaltsov, T. Laitinen et al, Interacting and Interplanetary Protons Accelerated on Diverging Magnetic Field Lines: Stochastic Acceleration ApJ, 521, 898-905, 1999. DOI .

J. Torsti, L. Kocharov, M. Teittinen et al, Energetic (\raisebox-0.5ex\textasciitilde10-65 MeV) protons observed by ERNE on August 13-14, 1996: Eruption on the solar back side as a possible source of the event J. Geophys. Res., 104, 9903-9910, 1999. DOI .

J. Torsti, A. Anttila, L. Kocharov et al, Energetic (\ensuremath\sim 1 to 50 MeV) protons associated with Earth-directed coronal mass ejections Geophys. Res. Lett., 25, 2525-2528, 1998. DOI .

J. Torsti, T. Laitinen, R. Vainio et al, Recurrence of Energetic Particle Flux Anisotropy as Observed by ERNE on 9 July 1996 Sol. Phys., 175, 771-784, 1997. DOI .

L. G. Kocharov, J. Torsti, T. Laitinen et al, Implications of Proton Anisotropy Development Observed by the ERNE Instrument During the 9 July 1996 Solar Particle Event Sol. Phys., 175, 785-795, 1997. DOI .

J. Torsti, E. Valtonen, E. Riihonen et al, ERNE observations of energetic particle fluxes Advances in Space Research, 20, 91-98, 1997. DOI .

J. Torsti, E. Valtonen, L. G. Kocharov et al, First Energetic Particle Events Observed by the ERNE Instrument Sol. Phys., 170, 179-191, 1997. DOI .