New radiation environment and effects models in the European Space Agency's Space Environment Information System (SPENVIS)

Heynderickx, D.; Quaghebeur, B.; Wera, J.; Daly, E.; Evans, H.

doi:10.1029/2004sw000073

Cited by 88 publications

(50 citation statements)

References 14 publications

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“…Most of those limitations have been overcome with the development of a new computer technique known as NOAAPRO Pfitzer, 1998a, 1998b], which has been implemented into SIREST for investigations studying Shuttle and ISS altitudes. A rationale for adopting AP8 was that it is readily available and commonly used [Heynderickx et al, 2005]. Below we demonstrate results that are consistent with the Pfitzer method.…”

Section: Thermospheric Flux Analysissupporting

confidence: 68%

Space Weather Quarterly Volume 4, Issue 3, 2007

2007

Space Weather Quarterly

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Section: Thermospheric Flux Analysissupporting

confidence: 68%

Space Weather Quarterly Volume 4, Issue 3, 2007

2007

Space Weather Quarterly

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“…The European Space Agency (ESA) Space Environment Information System (SPENVIS) provides standardized access to models of the hazardous space environment through a World Wide Web interface (Heynderickx et al, 2004). SPENVIS includes magnetic field models implemented by means of the UNILIB library for magnetic coordinate evaluation, magnetic field line tracing and drift shell tracing.…”

Section: Spenvismentioning

confidence: 99%

Calculations of the integral invariant coordinates I and L* in the magnetosphere and mapping of the regions where I is conserved, using a particle tracer (ptr3D v2.0), LANL*, SPENVIS, and IRBEM

Konstantinidis

Sarris

2015

Geosci. Model Dev.

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Abstract. The integral invariant coordinate I and Roederer's L or L * are proxies for the second and third adiabatic invariants, respectively, that characterize charged particle motion in a magnetic field. Their usefulness lies in the fact that they are expressed in more instructive ways than their counterparts: I is equivalent to the path length of the particle motion between two mirror points, whereas L * , although dimensionless, is equivalent to the distance from the center of the Earth to the equatorial point of a given field line, in units of Earth radii, in the simplified case of a dipole magnetic field. However, care should be taken when calculating the above invariants, as the assumption of their conservation is not valid everywhere in the Earth's magnetosphere. This is not clearly stated in state-of-the-art models that are widely used for the calculation of these invariants. The purpose of this work is thus to investigate where in the near-Earth magnetosphere we can safely calculate I and L * with tools with widespread use in the field of space physics, for various magnetospheric conditions and particle initial conditions. More particularly, in this paper we compare the values of I and L * as calculated using LANL*, an artificial neural network developed at the Los Alamos National Laboratory, SPENVIS, a space environment online tool, IRBEM, a software library dedicated to radiation belt modeling, and ptr3D, a 3-D particle tracing code that was developed for this study. We then attempt to quantify the variations between the calculations of I and L * of those models. The deviation between the results given by the models depends on particle initial position, pitch angle and magnetospheric conditions. Using the ptr3D v2.0 particle tracer we map the areas in the Earth's magnetosphere where I and L * can be assumed to be conserved by monitoring the constancy of I for energetic protons propagating forwards and backwards in time. These areas are found to be centered on the noon area, and their size also depends on particle initial position, pitch angle and magnetospheric conditions.

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“…[5]. It has also been made available through the SPENVIS web-site (http://www.spenvis.oma.be/spenvis/).…”

Section: Spenvis -Mulassismentioning

confidence: 99%

Validation of the Electromagnetic Physical Processes with Software SPENVIS

Loffredo

Pugliese²,

Quarto³

et al. 2015

AJEP

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Abstract:The Space Radiation represents a serious risk for astronauts during space missions. The risk related to the space radiation exposure could involve acute and/or late effects. The Solar Cosmic Radiation that consists of protons (≈98%) with a very wide spectrum in energy (up to several GeV), is the major source of exposure for the crew. In this paper we present the results of the validation of the electromagnetic physical processes with the aim to contribute to the study of radiation protection for astronauts, in particular against the radiation due to the Solar Particle Events (SPE). The simulation was performed using MULASSIS, a module to the software SPENVIS, with protons as source, in the energy range from 800 MeV to 1.2 GeV, on a slab of aluminum of mass thickness of 20 g/cm 2 . The results obtained by the simulation were compared with PSTAR database of the NIST. Finally, a comparison between SPENVIS and Geant4-9.6p2 was performed.

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New radiation environment and effects models in the European Space Agency's Space Environment Information System (SPENVIS)

Cited by 88 publications

References 14 publications

Space Weather Quarterly Volume 4, Issue 3, 2007

Space Weather Quarterly Volume 4, Issue 3, 2007

Calculations of the integral invariant coordinates <I>I</I> and <I>L</I>* in the magnetosphere and mapping of the regions where <I>I</I> is conserved, using a particle tracer (ptr3D v2.0), LANL*, SPENVIS, and IRBEM

Validation of the Electromagnetic Physical Processes with Software SPENVIS

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New radiation environment and effects models in the European Space Agency's Space Environment Information System (SPENVIS)

Cited by 88 publications

References 14 publications

Space Weather Quarterly Volume 4, Issue 3, 2007

Space Weather Quarterly Volume 4, Issue 3, 2007

Calculations of the integral invariant coordinates &lt;I&gt;I&lt;/I&gt; and &lt;I&gt;L&lt;/I&gt;* in the magnetosphere and mapping of the regions where &lt;I&gt;I&lt;/I&gt; is conserved, using a particle tracer (ptr3D v2.0), LANL*, SPENVIS, and IRBEM

Validation of the Electromagnetic Physical Processes with Software SPENVIS

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Calculations of the integral invariant coordinates <I>I</I> and <I>L</I>* in the magnetosphere and mapping of the regions where <I>I</I> is conserved, using a particle tracer (ptr3D v2.0), LANL*, SPENVIS, and IRBEM