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This special page shows all uploaded files.
| Date | Name | Thumbnail | Size | Description | Versions |
|---|---|---|---|---|---|
| 19:27, 16 April 2024 | Field from parallel wires.png (file) |  |
38 KB | 2 | |
| 14:45, 16 April 2024 | Helical railgun.png (file) |  |
174 KB | 2 | |
| 17:33, 15 April 2024 | Keplerian orbit ground impulse.png (file) |  |
60 KB | Launch with an impulse delivered only at ground level puts a payload on an orbital trajectory that will always intersect the ground. | 1 |
| 08:34, 4 April 2024 | Railgun projectile sabot separation 2.jpg (file) |  |
65 KB | The sabot separates from a hypervelocity railgun dart immediately after launch. | 1 |
| 12:03, 3 April 2024 | Hypervelocity projectile impact test.png (file) |  |
443 KB | 2 | |
| 11:46, 3 April 2024 | Railgun projectile sabot separation.png (file) |  |
143 KB | The sabot separates from a hypervelocity railgun dart immediately after launch. | 1 |
| 11:36, 3 April 2024 | HVP shrapnel separation.png (file) |  |
258 KB | A bursting charge disperses shrapnel sub-projectiles in a test of a railgun hypervelocity projectile. | 1 |
| 11:01, 3 April 2024 | Hypervelocity projectile.png (file) |  |
60 KB | BAE Systems railgun hypervelocity projectile, with (left) and without (right) its sabot. Images from Congressional Research Service report R44175, cropped, flipped, and rotated. https://crsreports.congress.gov/product/pdf/R/R44175/77 | 1 |
| 10:41, 3 April 2024 | Railgun projectile 2.png (file) |  |
36 KB | Credit: Laura Guerin Source: cK-12 Foundation License: [https://creativecommons.org/licenses/by-nc/3.0/ CC BY-NC 3.0] | 1 |
| 10:40, 3 April 2024 | Railgun projectile 1.jpg (file) |  |
43 KB | Reference: Fair, H. “Transitioning EM Railgun Technology to the Warfighter.” The University of Texas at Austin, May 2007. | 1 |
| 08:06, 3 April 2024 | EMRG prototype.png (file) |  |
240 KB | BAE prototype EMRG (electromagnetic railgun) prototype deomnstrator. Image from Congressional Research Service report R44175 https://crsreports.congress.gov/product/pdf/R/R44175/77 | 1 |
| 08:01, 3 April 2024 | Naval Electromagnetic Railgun.png (file) |  |
115 KB | General Atomics prototype EMRG (electromagnetic railgun) prototype. Image from Congressional Research Service report R44175 https://crsreports.congress.gov/product/pdf/R/R44175/77 | 1 |
| 07:35, 3 April 2024 | Railgun Firing Projectile.jpg (file) |  |
111 KB | Star Wars research: a railgun (Electromagnetic Launcher) fires a 0. 3 pound plastic projectile at 3 kilometers per second (7, 000 miles per hour) to completely penetrate a 1-inch steel target plate. The railgun is being developed at Maxwell Laboratories Inc. , San Diego, California, as part of the U. S. Government's research programme into space-based weapons capable of intercepting ballistic missiles - the Strategic Defense Initiative. Railguns use electromagnetism to accelerate a projectile... | 1 |
| 07:24, 3 April 2024 | Electromagnetic gun fire.jpg (file) |  |
20 KB | An electromagnetic railgun is fired at 10.64 megajoules with a muzzle velocity of 2,520 meters per second at Naval Surface Warfare Center, Dahlgren, Va., Jan. 31, 2008. Credit: U.S. Department of Defense https://www.defense.gov/Multimedia/Photos/igphoto/2001982027/ | 1 |
| 13:12, 1 April 2024 | Railgun simplified.png (file) |  |
48 KB | 3 | |
| 10:18, 31 March 2024 | Lorentz force current magnetic.png (file) |  |
17 KB | The force on a current due to a magnetic field. | 1 |
| 10:17, 31 March 2024 | Amperes circuit law.png (file) |  |
37 KB | The magnetic field (magenta) circulating around a cross sectional plane perpendicular to the direction of an infinite line of current (green). | 1 |
| 16:24, 15 March 2024 | Electrostatic active shielding 2.png (file) |  |
80 KB | Geometry optimized electrostatic shield design with negatively charged rods and positively charged plates. Design from Rajarshi Pal Chowdhury, Luke A. Stegeman, Matthew L. Lund, Dan Fry, Stojan Madzunkov, and Amir A. Bahadori, "Hybrid methods of radiation shielding against deep-space radiation", Life Sciences in Space Research, Volume 38, 2023, Pages 67-78, ISSN 2214-5524, https://doi.org/10.1016/j.lssr.2023.04.004. | 1 |
| 08:12, 14 March 2024 | Magnetic shielding Halback Array.png (file) |  |
308 KB | A spacecraft with a Halback array for a shield. A Halback array is a sequence of magnets each rotated by 90 degrees from the previous, so that their fields add on one side and cancel on the other. By making the field cancel in the interior of the Halback ring, the habitation module can be kept relatively field-free. The magnetic fields are shown in magenta and the current loops in green. Design from Paolo Desiati and Elena D'Onghia, "CREW HaT: A Magnetic Shielding System for Space Habitats",... | 1 |
| 20:05, 13 March 2024 | Plasma shield.png (file) |  |
353 KB | A habitation module with a plasma shield. The section in in the shape of a torus, as is necessary for hybrid shielding but which also conveniently allows spin gravity. Superconductive cables under the hull hull carry high electric currents (shown in green) which make a magnetic field (shown in magenta) that cancels in the interior but adds outside the ring. The fields confine a cloud of electrons (shown in yellow) outside of the habitat. The habitat itself carries a high positive electric cha... | 1 |
| 17:33, 2 March 2024 | Elctrostatic active shielding.png (file) |  |
88 KB | One proposed design for a deployable elctrostatic shield, using thin conductive "balloons" that "inflate" into spheres once charged. Ram K. Tripathi, John W. Wilson, and Robert C. Youngquist, "Electrostatic Active Radiation Shielding - Revisited", 2006 IEEE Aerospace Conference, Big Sky, MT, USA, 2006, pp. 9 pp.-, doi: 10.1109/AERO.2006.1655760. | 1 |
| 15:18, 2 March 2024 | Racetrack magnetic active shielding.png (file) |  |
66 KB | A spacecraft with the magnetic shield entirely confined inside a structure (in this case, the design is known as the "racetrack" configuration). Electric currents are shown in green, the magnetic field in magenta, and an example track of a radiation particle is in red. | 1 |
| 15:17, 2 March 2024 | Unconfined FRC magnetic active shielding.png (file) |  |
100 KB | A spacecraft shielded with an unconfined magnetic field, created by two simple current loops (green) with the resulting magnetic field shown in magenta. | 1 |
| 08:42, 27 February 2024 | Relativistic travel radiation penetration depth.png (file) |  |
80 KB | Stopping distance of protons in titanium and living tissue as a function of speed <math>\beta=v/c</math> relative to light speed. Oleg G. Semyonov, "Radiation Hazard of Relativistic Interstellar Flight", https://arxiv.org/pdf/physics/0610030 | 1 |
| 08:30, 27 February 2024 | Relativistic travel unshielded dose rate.png (file) |  |
60 KB | The rate at which an unshielded individual will take radiation dose as a function of speed <math>\beta=v/c</math> relative to light speed. Oleg G. Semyonov, "Radiation Hazard of Relativistic Interstellar Flight", https://arxiv.org/pdf/physics/0610030 | 1 |
| 16:12, 25 February 2024 | SEP shielding.png (file) |  |
105 KB | Relative dose of solar energetic particles as a function of thickness of aluminum and polyethylene shielding L.W. Townsend, J.H. Adams, S.R. Blattnig, M.S. Clowdsley, D.J. Fry, I. Jun, C.D. McLeod, J.I. Minow, D.F. Moore, J.W. Norbury, R.B. Norman, D.V. Reames, N.A. Schwadron, E.J. Semones, R.C. Singleterry, T.C. Slaba, C.M. Werneth, M.A. Xapsos, "Solar particle event storm shelter requirements for missions beyond low Earth orbit", Life Sciences in Space Research, Volume 17 (2018), Pages 32-... | 1 |
| 15:46, 25 February 2024 | GCR Shielding comparison.png (file) |  |
140 KB | Comparison of aluminum, lunar regolith, and polyethyene shielding as a function of thickness at both solar maximum and solar minimum galactic cosmic ray conditions. Felix Horst, Daria Boscolo, Marco Durante, Francesca Luoni, Christoph Schuy, and Uli Weber, "Thick shielding against galactic cosmic radiation: A Monte Carlo study with focus on the role of secondary neutrons", Life Sciences in Space Research, Volume 33 (2022), Pages 58-68, https://doi.org/10.1016/j.lssr.2022.03.003. | 1 |
| 13:59, 25 February 2024 | Solar flare shielding Poly.png (file) |  |
120 KB | Relative dose of solar flare x-rays for a given thickness of polymer shielding. Different curves show different flare spectral distributions of x-rays. David S. Smith and John M. Scalo, "Risks due to X-ray flares during astronaut extravehicular activity", Space Weather vol. 5, S06004, doi:10.1029/2006SW000300 (2007) https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2006SW000300 | 1 |
| 13:56, 25 February 2024 | Solar flare shielding Al.png (file) |  |
125 KB | Relative dose of solar flare x-rays for a given thickness of aluminum shielding. Different curves show different flare spectral distributions of x-rays. David S. Smith and John M. Scalo, "Risks due to X-ray flares during astronaut extravehicular activity", Space Weather vol. 5, S06004, doi:10.1029/2006SW000300 (2007) https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2006SW000300 | 1 |
| 09:21, 25 February 2024 | Regolith Shielding.png (file) |  |
117 KB | Relative effect of radiation (compared to no shielding) behind different thicknesses of water, aluminum, and lunar regolith. Tony C. Slaba, "Radiation Shielding for Lunar Missions: Regolith Considerations", LSIC Crosstalk 7/18/2022 https://lsic.jhuapl.edu/uploadedDocs/focus-files/1604-E&C%20+%20EE%20Monthly%20Meeting%20-%202022%2007%20July_Presentation%20-%20NASA%20Slaba.pdf | 1 |
| 20:24, 24 February 2024 | GCR Thick Shielding Atmospheric.png (file) |  |
165 KB | Dose rates for atmospheric shielding. Robert C. Youngquist, Mark A. Nurge, Stanley O. Starr, Steven L. Koontz, "Thick galactic cosmic radiation shielding using atmospheric data", Acta Astronomica <b>94</b> (2014) 132-138 https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=6b1a8887b05a92afd074e5b935a8bd5148dfc8d9 | 1 |
| 18:37, 24 February 2024 | GCR Shielding Effectiveness.png (file) |  |
220 KB | Relative effect of radiation on biological tissue behind a given density of material. The results of two models are shown. On the left is the standard risk assessment method using quality factor as a function of linear energy transfer. On the right is a track structure repair kinetic model for mouse cells. W. Schimmerling <i>et al.</i>, "Shielding Against Galactic Cosmic Rays", Adv. Space Res. Vol. 17 No. 2 pp. (2)31-(2)36 (1996) | 1 |
| 16:55, 23 February 2024 | Planetary magnetic field and radiation belts.png (file) |  |
115 KB | 3 | |
| 09:46, 23 February 2024 | Dose rate at Ganymede and Europa with shielding.png (file) |  |
99 KB | Dose rate at Europa and Ganymede orbit for different amounts of shielding. Podzolko, M.V.; Getselev, I.V. (March 8, 2013). [https://forum.nasaspaceflight.com/index.php?action=dlattach;topic=32688.0;attach=541277 "Radiation Conditions of a Mission to Jupiterʼs Moon Ganymede"]. International Colloquium and Workshop "Ganymede Lander: Scientific Goals and Experiments. IKI, Moscow, Russia: Moscow State University. | 1 |
| 09:32, 23 February 2024 | Jupiter radiation environment.png (file) |  |
132 KB | Radiation dose rate with distance from Jupiter's center, as measured in Jupiter radii. Podzolko, M.V.; Getselev, I.V. (March 8, 2013). [https://forum.nasaspaceflight.com/index.php?action=dlattach;topic=32688.0;attach=541277 "Radiation Conditions of a Mission to Jupiterʼs Moon Ganymede"]. International Colloquium and Workshop "Ganymede Lander: Scientific Goals and Experiments. IKI, Moscow, Russia: Moscow State University. | 1 |
| 20:53, 21 February 2024 | Proton energy spectra Van Allen belt.png (file) |  |
99 KB | Typical proton energy spectra for the inner Van Allen belt for magnetic shells extending to various distances as measured in Earth radii from Earth's center. | 1 |
| 21:47, 19 February 2024 | Proton Energy Spectra Space Radiation.png (file) |  |
161 KB | Proton energy spectra at 1 AU, showing the increase in solar energetic particles during solar particle events. SEP = solar energetic particle, GCR = galactic cosmic ray. | 1 |
| 18:57, 17 February 2024 | Cosmic ray flux versus particle energy.svg (file) |  |
113 KB | By Sven Lafebre - own work, after Swordy[1] and De Angelis[2], CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=1555202 | 1 |
| 20:43, 26 July 2023 | Photon pack.png (file) |  |
61 KB | 1 | |
| 13:42, 24 October 2022 | Fission gamma spectrum lin.png (file) |  |
19 KB | 1 | |
| 11:31, 24 October 2022 | Watt energy spectrum.png (file) |  |
22 KB | 3 | |
| 18:18, 23 October 2022 | Exposure chart-XKCD.svg.png (file) |  |
1.33 MB | Radiation Dose Chart by Randall Munroe as part of the webcomic xkcd. n response to concerns about the radioactivity released by the Fukushima Daiichi nuclear disaster in 2011, and to remedy what he described as "confusing" reporting on radiation levels in the media, Munroe created a chart of comparative radiation exposure levels. The chart was rapidly adopted by print and online journalists in several countries, including being linked to by online writers for The Guardian and The New York Ti... | 1 |
| 11:26, 31 August 2022 | Self-charge shaped beam.png (file) |  |
57 KB | 2 | |
| 18:44, 18 August 2022 | F of chi over chi far.png (file) |  |
50 KB | 1 | |
| 18:43, 18 August 2022 | F of chi far.png (file) |  |
43 KB | 1 | |
| 18:43, 18 August 2022 | F of chi over chi close.png (file) |  |
49 KB | 1 | |
| 18:42, 18 August 2022 | F of chi close.png (file) |  |
46 KB | 1 | |
| 10:54, 18 August 2022 | Plasma lens end on view.png (file) |  |
69 KB | 1 | |
| 10:53, 18 August 2022 | Plasma lens perspective.png (file) |  |
89 KB | 1 | |
| 07:20, 18 August 2022 | Compact toroid stability.png (file) |  |
156 KB | 1 |
