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Below is a list of the most recent file uploads. See the gallery of new files for a more visual overview.
(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)- 20:27, 16 April 2024 Lwcamp talk contribs uploaded a new version of File:Field from parallel wires.png
- 15:45, 16 April 2024 Lwcamp talk contribs uploaded a new version of File:Helical railgun.png
- 13:17, 16 April 2024 Lwcamp talk contribs uploaded File:Helical railgun.png (Diagram of the internals of a helical railgun. The stator, including the rails and the helical winding, are on the left and form a barrel (covered with a mechanical support to withstand the forces of firing). The full projectile is shown on the right bottom, and the active portions of the electrical system of the projectile at top right.)
- 18:33, 15 April 2024 Lwcamp talk contribs uploaded File:Keplerian orbit ground impulse.png (Launch with an impulse delivered only at ground level puts a payload on an orbital trajectory that will always intersect the ground.)
- 10:48, 13 April 2024 Tshhmon talk contribs uploaded File:F15asm.png (F-15 ASM-135 launch Paul E. Reynolds (USAF))
- 13:33, 12 April 2024 Tshhmon talk contribs uploaded a new version of File:Laser-microchannel experiment.jpg
- 13:24, 12 April 2024 Tshhmon talk contribs uploaded File:Laser-microchannel experiment.jpg (A laser microchannel experiment. A relativistically intense laser is shot at so-called "microchannel array" targets that have ultratiny tubes that experimenters try and get the beam down. Crazy physics then proceeds to happen with high-energy electrons, lots of THz and lots of x-rays made.)
- 12:56, 11 April 2024 Tshhmon talk contribs uploaded File:Astronomycosmology.png
- 09:34, 4 April 2024 Lwcamp talk contribs uploaded File:Railgun projectile sabot separation 2.jpg (The sabot separates from a hypervelocity railgun dart immediately after launch.)
- 13:03, 3 April 2024 Lwcamp talk contribs uploaded a new version of File:Hypervelocity projectile impact test.png
- 12:56, 3 April 2024 Lwcamp talk contribs uploaded File:Hypervelocity projectile impact test.png (Test of a railgun-fired hypervelocity projectile penetrating a series of metal plates.)
- 12:46, 3 April 2024 Lwcamp talk contribs uploaded File:Railgun projectile sabot separation.png (The sabot separates from a hypervelocity railgun dart immediately after launch.)
- 12:36, 3 April 2024 Lwcamp talk contribs uploaded File:HVP shrapnel separation.png (A bursting charge disperses shrapnel sub-projectiles in a test of a railgun hypervelocity projectile.)
- 12:01, 3 April 2024 Lwcamp talk contribs uploaded File:Hypervelocity projectile.png (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)
- 11:41, 3 April 2024 Lwcamp talk contribs uploaded File:Railgun projectile 2.png (Credit: Laura Guerin Source: cK-12 Foundation License: [https://creativecommons.org/licenses/by-nc/3.0/ CC BY-NC 3.0])
- 11:40, 3 April 2024 Lwcamp talk contribs uploaded File:Railgun projectile 1.jpg (Reference: Fair, H. “Transitioning EM Railgun Technology to the Warfighter.” The University of Texas at Austin, May 2007.)
- 09:06, 3 April 2024 Lwcamp talk contribs uploaded File:EMRG prototype.png (BAE prototype EMRG (electromagnetic railgun) prototype deomnstrator. Image from Congressional Research Service report R44175 https://crsreports.congress.gov/product/pdf/R/R44175/77)
- 09:01, 3 April 2024 Lwcamp talk contribs uploaded File:Naval Electromagnetic Railgun.png (General Atomics prototype EMRG (electromagnetic railgun) prototype. Image from Congressional Research Service report R44175 https://crsreports.congress.gov/product/pdf/R/R44175/77)
- 08:35, 3 April 2024 Lwcamp talk contribs uploaded File:Railgun Firing Projectile.jpg (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...)
- 08:24, 3 April 2024 Lwcamp talk contribs uploaded File:Electromagnetic gun fire.jpg (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/)
- 14:12, 1 April 2024 Lwcamp talk contribs uploaded a new version of File:Railgun simplified.png
- 11:47, 31 March 2024 Lwcamp talk contribs uploaded a new version of File:Railgun simplified.png
- 11:45, 31 March 2024 Lwcamp talk contribs uploaded File:Railgun simplified.png (A simplified diagram showing the workings of a railgun. The current flowing through the rails produces a magnetic field that pushes on the current flowing through the projectile, propelling down the rails.)
- 11:18, 31 March 2024 Lwcamp talk contribs uploaded File:Lorentz force current magnetic.png (The force on a current due to a magnetic field.)
- 11:17, 31 March 2024 Lwcamp talk contribs uploaded File:Field from parallel wires.png (The magnetic field (magenta) circulating around a cross sectional plane perpendicular to the direction of two infinite line of current in the opposite directions (green).)
- 11:17, 31 March 2024 Lwcamp talk contribs uploaded File:Amperes circuit law.png (The magnetic field (magenta) circulating around a cross sectional plane perpendicular to the direction of an infinite line of current (green).)
- 17:24, 15 March 2024 Lwcamp talk contribs uploaded File:Electrostatic active shielding 2.png (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.)
- 14:10, 15 March 2024 Tshhmon talk contribs uploaded File:Ltwormhole.jpg ([https://www.youtube.com/watch?v=SuJ-2nTvAWo Still from a raytraced simulation of a long-throated wormhole, by Pablo Antonio Cano (YT).])
- 09:12, 14 March 2024 Lwcamp talk contribs uploaded File:Magnetic shielding Halback Array.png (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",...)
- 21:05, 13 March 2024 Lwcamp talk contribs uploaded File:Plasma shield.png (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...)
- 18:33, 2 March 2024 Lwcamp talk contribs uploaded File:Elctrostatic active shielding.png (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.)
- 16:18, 2 March 2024 Lwcamp talk contribs uploaded File:Racetrack magnetic active shielding.png (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.)
- 16:17, 2 March 2024 Lwcamp talk contribs uploaded File:Unconfined FRC magnetic active shielding.png (A spacecraft shielded with an unconfined magnetic field, created by two simple current loops (green) with the resulting magnetic field shown in magenta.)
- 09:42, 27 February 2024 Lwcamp talk contribs uploaded File:Relativistic travel radiation penetration depth.png (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)
- 09:30, 27 February 2024 Lwcamp talk contribs uploaded File:Relativistic travel unshielded dose rate.png (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)
- 17:12, 25 February 2024 Lwcamp talk contribs uploaded File:SEP shielding.png (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-...)
- 16:46, 25 February 2024 Lwcamp talk contribs uploaded File:GCR Shielding comparison.png (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.)
- 14:59, 25 February 2024 Lwcamp talk contribs uploaded File:Solar flare shielding Poly.png (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)
- 14:56, 25 February 2024 Lwcamp talk contribs uploaded File:Solar flare shielding Al.png (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)
- 10:21, 25 February 2024 Lwcamp talk contribs uploaded File:Regolith Shielding.png (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)
- 21:24, 24 February 2024 Lwcamp talk contribs uploaded File:GCR Thick Shielding Atmospheric.png (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)
- 19:37, 24 February 2024 Lwcamp talk contribs uploaded File:GCR Shielding Effectiveness.png (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))
- 17:55, 23 February 2024 Lwcamp talk contribs uploaded a new version of File:Planetary magnetic field and radiation belts.png
- 17:54, 23 February 2024 Lwcamp talk contribs uploaded a new version of File:Planetary magnetic field and radiation belts.png
- 10:46, 23 February 2024 Lwcamp talk contribs uploaded File:Dose rate at Ganymede and Europa with shielding.png (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.)
- 10:32, 23 February 2024 Lwcamp talk contribs uploaded File:Jupiter radiation environment.png (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.)
- 21:53, 21 February 2024 Lwcamp talk contribs uploaded File:Proton energy spectra Van Allen belt.png (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.)
- 19:21, 21 February 2024 Lwcamp talk contribs uploaded File:Planetary magnetic field and radiation belts.png (Planetary magnetic field (black) with trapped radiation belts (green) and the trajectory of an individual charged particle in the belt (red).)
- 22:47, 19 February 2024 Lwcamp talk contribs uploaded File:Proton Energy Spectra Space Radiation.png (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.)
- 19:57, 17 February 2024 Lwcamp talk contribs uploaded File:Cosmic ray flux versus particle energy.svg (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)