Space radiation environment P' Nieminen, E'Daly, ESAESTEC, The Netherlands P' Truscott, C' Dyer, H'

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Space radiation environmentP. Nieminen, E.Daly,
ESA/ESTEC, The NetherlandsP. Truscott, C. Dyer,
H. Evans, DERA, UKF. Lei, R. Gurriaran, U.
Southampton, UKJ. Allison, U. Manchester, UK
Images and data in this presentation courtesy of
SOHO (ESA/NASA), Yohkoh (ISAS), TRACE (NASA), ISO
(ESA), Hubble Space Telescope (NASA/ESA), Apollo
(NASA), REM (ESA), GOES-9 (NOAA), New Mexico
Observatory (USA)
ESA Space Environment Effects Analysis Section
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ESA Space Environment Effects Analysis Section
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Anomalous cosmic rays
Galactic and extra-galactic cosmic rays
Jovian electrons
Neutrinos
Solar X-rays
Trapped particles
Incuded emission
Solar flare neutrons and g-rays
Solar flare electrons, protons, and heavy ions
ESA Space Environment Effects Analysis Section
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Solar cycle
Sunspot number from 1750
Yohkoh SXT 1991 and 1995
ESA Space Environment Effects Analysis Section
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Solar proton events
SOHO EIT
New Mexico Ha image
Proton event on 20-23 April -98 ISO Star
Tracker fake counts
ESA Space Environment Effects Analysis Section
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SOHO LASCO instrument before the event...
and after.
ESA Space Environment Effects Analysis Section
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Trapped particles
The SAA
ESA Space Environment Effects Analysis Section
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Trapped particles
Electron spectra
Proton spectra
REM data
ESA Space Environment Effects Analysis Section
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Cosmic rays
Peak at 300 MeV
Neutron monitor network, muon detectors,
satellites
High-energy tail up to 1022 eV
ESA Space Environment Effects Analysis Section
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Conclusions

• Solar system radiation environments highly
  complex and variable
• New solar maximum 2000-2001 approaching
• New technologies ? vulnerability to
  radiation-induced effects
• Need for space-specific radiation analysis tools
  

? GEANT4
ESA Space Environment Effects Analysis Section