1 / 20

LT RBR :

LT RBR :. Long Term Radiation Belt Remediation. Joshua Davis ASTE 527 Space Concepts Studio. LT RBR :. RBR means removing the trapped electrons and ions from the near Earth environment for the benefit of manned and unmanned spacecraft. Radiation Environment’s Impact on Manned Spaceflight.

hani
Télécharger la présentation

LT RBR :

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LT RBR: Long Term Radiation Belt Remediation Joshua Davis ASTE 527 Space Concepts Studio

  2. LT RBR: RBR means removing the trapped electrons and ions from the near Earth environment for the benefit of manned and unmanned spacecraft.

  3. Radiation Environment’s Impact on Manned Spaceflight A majority of the radiation Astronauts receive on orbit is attributed to the trapped radiation particles in the inner Van Allen belt. Temporary and permanent eye damage. Increased risk of cancers. Time on orbit is limited by an Astronaut’s total radiation exposure, limiting the ability to study long term micro-gravity effects on Humans. The daily dosage of radiation on the ISS is equal to 8 chest X-rays per day. Radiation dosage on the ISS is roughly 4 orders of magnitude higher than at Sea Level. Increased risk of heart, digestive, and respiratory diseases.

  4. Energetic Particle & Plasma Hazards before after False stars in star tracker CCDs Surface degradation from radiation Solar array power decrease due to radiation damage Electronics degrade due to total radiation dose Solar array arc discharge Single event effects in microelectronics: bit flips, fatal latch-ups Spacecraft components become radioactive Electromagnetic pulse from vehicle discharge Induced Voltage Cryogenic systems experience notable charged particle heating Time

  5. Energetic Particle & Plasma Hazards Arc Discharging Bit Flips / Single Event Upsets Solar Panel Power Decrease

  6. Particle Motion in Earth’s Magnetic Field

  7. How RBR Works: Change the particle’s pitch cone angle such that its velocity vector is pointed roughly parallel to the magnetic field lines.

  8. Tethers Unlimited : HiVOLT

  9. Neutral Particle Injection Ion-Cyclotron Turbulence Generation

  10. VLF: Very Low Frequency Radio Waves

  11. Experimental Data for VLF RBR 1100 km alt

  12. Issues with RBR

  13. Conclusion and Future Work for LT RBR VLF should be further researched as the primary method for LT RBR Feasibility study of Long Term operation of VLF stations Additional study on the effects of RBR on the atmosphere should be conducted

  14. References • Odenwald, Sten. "What Are Space Radiation Effects?" NASA. <http://radbelts.gsfc.nasa.gov/outreach/effects.html>. • Hess, Wilmot N. "Energetic Particles in the Inner Van Allen Belt." Space Science Reviews 1.2 (1962). <http://rd.springer.com/article/10.1007%2FBF00240580> • Hoyt, Robert P., and Forward, Robert L. "Radiation Remediation." Tethers Unlimited. <http://www.tethers.com/HiVOLT.html>. • Chang, Ouliang. "Numerical Simulation of Ion-Cyclotron Turbulence Generated by Artificial Plasma Cloud Release." Thesis. Virginia Tech, 2009. <http://scholar.lib.vt.edu/theses/available/etd-07152009-125531/>.

  15. References Cont. • Papadopoulos, Konstantinos. Et al. "Generation and Evolution of Intense Ion Cyclotron Turbulence by Artificial Plasma Cloud in the Magnetosphere." Journal of Geophysical Research 112 (2007) • Gamble, Rory. Et al. "Radiation Belt Electron Precipitation by Man-made VLF Transmissions." Journal of Geophysical Research 113 (2008): American Geophysical Union, 21 Oct. 2008.<http://www.agu.org/pubs/crossref/2008/2008JA013369.shtml>. • Rodger, Craig J. "The Atmospheric Implications of Radiation Belt Remediation." AnnalesGeophysicae 24 (2006). European Geosciences Union. <http://www.ann-geophys.net/24/2025/2006/angeo-24-2025-2006.pdf>.

  16. Backup Slides

  17. Why does the Earth have a Radiation Belt? A Radiation Belt is more stylish than Radiation Suspenders!

  18. International “Space EPA” to study and control RBR practices and take over NOAA’s space weather responsibilities.

More Related