Directed-energy weapon

This article is about real uses of directed energy weapons. For other uses, see Energy weapon.
Humvee with Active Denial System mounted
United States Humvee with Active Denial System mounted

A directed-energy weapon (DEW) emits highly focused energy, transferring that energy to a target to damage it.

Potential applications of this technology include anti-personnel weapon systems, potential missile defense system, and the disabling of lightly armored vehicles such as cars, drones, watercraft, and electronic devices such as mobile phones.[1][2]

The Pentagon is researching technologies like directed-energy weapon and railguns to counter maturing threats posed by missile and hypersonic glide vehicles. These systems of missile defense are expected to come online in the mid to late-2020s.[3]

Operational advantages

Directed energy weapons could have several main advantages over conventional weaponry:

Types

Microwave weapons

Although some devices are labelled as microwave weapons, the microwave range is commonly defined as being between 300 MHz and 300 GHz which is within the RF range.[6] Some examples of weapons which have been publicized by the military are as follows:

Electrolaser

Main article: Electrolaser

An electrolaser lets ionization occur, and then sends a powerful electric current down the conducting ionized track of plasma so formed, somewhat like lightning. It functions as a giant high energy long-distance version of the Taser or stun gun.

Pulsed energy projectile

Pulsed Energy Projectile or PEP systems emit an infrared laser pulse which creates rapidly expanding plasma at the target. The resulting sound, shock and electromagnetic waves stun the target and cause pain and temporary paralysis. The weapon is under development and is intended as a non-lethal weapon in crowd control though it can also be used as a lethal weapon.

Dazzler

A Dazzler is a directed-energy weapon intended to temporarily blind or disorient its target with intense directed radiation. Targets can include sensors or human vision. Dazzlers emit infrared or invisible light against various electronic sensors, and visible light against humans, when they are intended to cause no long-term damage to eyes. The emitters are usually lasers, making what is termed a laser dazzler. Most of the contemporary systems are man-portable, and operate in either the red (a laser diode) or green (a diode-pumped solid-state laser, DPSS) areas of the electromagnetic spectrum.

Initially developed for military use, non-military products are becoming available for use in law enforcement and security.[16][17]

Weapons designed to cause permanent blindness are banned by the 1995 United Nations Protocol on Blinding Laser Weapons. The dazzler is a non-lethal weapon intended to cause temporary blindness or disorientation and therefore falls outside this protocol.

PHASR Rifle

The personnel halting and stimulation response rifle (PHASR) is a prototype non-lethal laser dazzler developed by the Air Force Research Laboratory's Directed Energy Directorate, U.S. Department of Defense.[18] Its purpose is to temporarily disorient and blind a target. Blinding laser weapons have been tested in the past, but were banned under the 1995 UN Protocol on Blinding Laser Weapons, which the United States acceded to on 21 January 2009.[19] The PHASR rifle, a low-intensity laser, is not prohibited under this regulation, as the blinding effect is intended to be temporary. It also uses a two-wavelength laser.[20] The PHASR was tested at Kirtland Air Force Base, part of the Air Force Research Laboratory Directed Energy Directorate in New Mexico.

Soviet laser pistol was a prototype weapon designed for cosmonauts.

Laser Weapon Examples

Problems with laser weapons

Blooming

Laser beams begin to cause plasma breakdown in the atmosphere at energy densities of around one megajoule per cubic centimetre. This effect, called "blooming," causes the laser to defocus and disperse energy into the surrounding air. Blooming can be more severe if there is fog, smoke, or dust in the air.

Techniques that may reduce these effects include:

Countermeasures

The Chinese People's Liberation Army has invested in the development of coatings that can deflect beams fired by U.S. military lasers. Lasers are composed of light that can be deflected, reflected, or absorbed by manipulating physical and chemical properties of materials. Artificial coatings can counter certain specific types of lasers, but if a different type was used than the coating was designed to handle it would be able to burn through it. The coatings are made of several different substances including low-cost metals, rare earths, carbon fiber, silver, and diamonds that have been processed to fine sheens and tailored against specific laser weapon systems. China is developing anti-laser defenses because protection against them is considered far cheaper than creating competing laser weapons themselves.[42]

Particle-beam weapons

Main article: Particle-beam weapon

Particle-beam weapons can use charged or neutral particles, and can be either endoatmospheric or exoatmospheric. Particle beams as beam weapons are theoretically possible, but practical weapons have not been demonstrated. Certain types of particle beams have the advantage of being self-focusing in the atmosphere.

Blooming is also a problem in particle-beam weapons. Energy that would otherwise be focused on the target spreads out; the beam becomes less effective:

Plasma weapons

Main article: Plasma weapon

Plasma weapons fire a beam, bolt, or stream of plasma, which is an excited state of matter consisting of atomic electrons & nuclei and free electrons if ionized, or other particles if pinched.

The MARAUDER (Magnetically Accelerated Ring to Achieve Ultra-high Directed-Energy and Radiation) used the Shiva Star project (a high energy capacitor bank which provided the means to test weapons and other devices requiring brief and extremely large amounts of energy) to accelerate a toroid of plasma at a significant percentage of the speed of light.[43]

A makeshift plasma railgun has been constructed using 3D printing.[44]

Sonic weapons

Main article: Sonic weaponry

Cavitation, which affects gas nuclei in human tissue, and heating can result from exposure to ultrasound and can damage tissue and organs. Studies have found that exposure to high intensity ultrasound at frequencies from 700 kHz to 3.6 MHz can cause lung and intestinal damage in mice. Heart rate patterns following vibroacoustic stimulation have resulted in serious arterial flutter and bradycardia. Researchers have concluded that generating pain through the auditory system using high intensity sound risked permanent hearing damage.

A multi-organization research program[45] involved high intensity audible sound experiments on human subjects. Extra-aural (unrelated to hearing) bioeffects on various internal organs and the central nervous system included auditory shifts, vibrotactile sensitivity change, muscle contraction, cardiovascular function change, central nervous system effects, vestibular (inner ear) effects, and chest wall/lung tissue effects. Researchers found that low frequency sonar exposure could result in significant cavitations, hypothermia, and tissue shearing. Follow-on experiments were not recommended.

Tests performed on mice show the threshold for both lung and liver damage occurs at about 184 dB. Damage increases rapidly as intensity is increased. Noise-induced neurological disturbances in humans exposed to continuous low frequency tones for durations longer than 15 minutes involved development of immediate and long-term problems affecting brain tissue. The symptoms resembled those of individuals who had suffered minor head injuries. One theory for a causal mechanism is that the prolonged sound exposure resulted in enough mechanical strain to brain tissue to induce an encephalopathy.[46]

Long Range Acoustic Device (LRAD)

The LRAD is the round black device on top of the New York City police Hummer.

The Long Range Acoustic Device (LRAD) is an acoustic hailing device developed by LRAD Corporation to send messages and warning tones over longer distances or at higher volume than normal loudspeakers. LRAD systems are used for long range communications in a variety of applications[47] including as a means of non-lethal, non-kinetic crowd control. Though they have been called "sonic weapons", LRADs are not inherently for military use.

According to the manufacturer's specifications, the systems weigh from 15 to 320 pounds (6.8 to 145.1 kg) and can emit sound in a 30°- 60° beam at 2.5 kHz.[48] The manufacturer also produces systems for public address and mass notification use that broadcast 360°.[49]

History

Mirrors of Archimedes

Archimedes may have used mirrors acting collectively as a parabolic reflector to burn ships attacking Syracuse.

According to a legend, Archimedes created a mirror with an adjustable focal length (or more likely, a series of mirrors focused on a common point) to focus sunlight on ships of the Roman fleet as they invaded Syracuse, setting them on fire.[50] Historians point out that the earliest accounts of the battle did not mention a "burning mirror", but merely stated that Archimedes's ingenuity combined with a way to hurl fire were relevant to the victory. Some attempts to replicate this feat have had some success; in particular, an experiment by students at MIT showed that a mirror-based weapon was at least possible, if not necessarily practical.[51]

Robert Watson-Watt

In 1935, the British Air Ministry asked Robert Watson-Watt of the Radio Research Station whether a "death ray" was possible. He and colleague Arnold Wilkins quickly concluded that it was not feasible, but as a consequence suggested using radio for the detection of aircraft and this started the development of radar in Britain.

Engine-stopping rays

Engine-stopping rays are a variant that occurs in fiction and myth. Such stories were circulating in Britain around 1938. The tales varied but in general terms told of tourists whose car engine suddenly died and were then approached by a German soldier who told them that they had to wait. The soldier returned a short time later to say that the engine would now work and the tourists drove off. A possible origin of some of these stories arises from the testing of the television transmitter in Feldberg, Germany. Because electrical noise from car engines would interfere with field strength measurements, sentries would stop all traffic in the vicinity for the twenty minutes or so needed for a test. A distorted retelling of the events might give rise to the idea that a transmission killed the engine.[52]

Modern automobile engines are not mechanically but electronically controlled. Disabling the electronics can indeed stop the engine. This has been implemented in OnStar, which has a remote control feature, but this is not a weapon. It is an add-on to the electronics of the car. Because a car is operating on a closed system, it would be impossible to use an electronic means of disengaging an engine, short of electrocuting it via laser or pulse weaponry. See also electromagnetic pulse (EMP), which is known for its engine-stopping effect, but is an undirected-energy weapon.

In 2015, Lockheed Martin reported a demonstration of the ATHENA Laser Weapons System that disabled the engine of a truck from a distance of one mile.[53]

Tesla

Nikola Tesla (1856–1943), a noted inventor, scientist and electrical engineer, developed early high frequency technologies. Tesla worked on plans for a directed-energy weapon from the early 1900s until his death. In 1937, Tesla composed a treatise entitled The Art of Projecting Concentrated Non-dispersive Energy through the Natural Media concerning charged particle beams.[54]

German World War II experimental weapons

During the early 1940s Axis engineers developed a sonic cannon that could cause fatal vibrations in its target body. A methane gas combustion chamber leading to two parabolic dishes pulse-detonated at roughly 44 Hz. This infrasound, magnified by the dish reflectors, caused vertigo and nausea at 200–400 metres (220–440 yd) by vibrating the middle ear bones and shaking the cochlear fluid within the inner ear. At distances of 50–200 metres (160–660 ft), the sound waves could act on organ tissues and fluids by repeatedly compressing and releasing compressive resistant organs such as the kidneys, spleen, and liver. (It had little detectable effect on malleable organs such as the heart, stomach and intestines.) Lung tissue was affected at only the closest ranges as atmospheric air is highly compressible and only the blood rich alveoli resist compression. In practice, the weapon system was highly vulnerable to enemy fire. Rifle, bazooka and mortar rounds easily deformed the parabolic reflectors, rendering the wave amplification ineffective.[55]

In the later phases of World War II, Nazi Germany increasingly put its hopes on research into technologically revolutionary secret weapons, the Wunderwaffen.

Among the directed-energy weapons the Nazis investigated were X-ray beam weapons developed under Heinz Schmellenmeier, Richard Gans and Fritz Houtermans. They built an electron accelerator called Rheotron (invented by Max Steenbeck at Siemens-Schuckert in the 1930s, these were later called Betatrons by the Americans) to generate hard X-ray synchrotron beams for the Reichsluftfahrtministerium (RLM). The intent was to pre-ionize ignition in aircraft engines and hence serve as anti-aircraft DEW and bring planes down into the reach of the FLAK. The Rheotron was captured by the Americans in Burggrub on April 14, 1945.

Another approach was Ernst Schiebolds 'Röntgenkanone' developed from 1943 in Großostheim near Aschaffenburg. The Company Richert Seifert & Co from Hamburg delivered parts.[56]

Microwave weapons were investigated together with the Japanese.

Strategic Defense Initiative

In the 1980s, U.S. President Ronald Reagan proposed the Strategic Defense Initiative (SDI) program, which was nicknamed Star Wars. It suggested that lasers, perhaps space-based X-ray lasers, could destroy ICBMs in flight. Panel discussions on the role of high-power lasers in SDI took place at various laser conferences, during the 1980s, with the participation of noted physicists including Edward Teller.[57][58]

Though the strategic missile defense concept has continued to the present under the Missile Defense Agency, most of the directed-energy weapon concepts were shelved. However, Boeing has been somewhat successful with the Boeing YAL-1 and Boeing NC-135, the first of which destroyed two missiles in February 2010. Funding has been cut to both of the programs.

Iraq War

During the Iraq War, electromagnetic weapons, including high power microwaves, were used by the U.S. military to disrupt and destroy Iraqi electronic systems and may have been used for crowd control. Types and magnitudes of exposure to electromagnetic fields are unknown.[59]

Alleged tracking of Space Shuttle Challenger

The Soviet Union invested some effort in the development of ruby and carbon dioxide lasers as anti-ballistic missile systems, and later as a tracking and anti-satellite system. There are reports that the Terra-3 complex at Sary Shagan was used on several occasions to temporarily "blind" US spy satellites in the IR range.

It has been claimed that the USSR made use of the lasers at the Terra-3 site to target the Space Shuttle Challenger in 1984.[60][61] At the time, the Soviet Union were concerned that the shuttle was being used as a reconnaissance platform. On 10 October 1984 (STS-41-G), the Terra-3 tracking laser was allegedly aimed at Challenger as it passed over the facility. Early reports claimed that this was responsible for causing "malfunctions on the space shuttle and distress to the crew", and that the United States filed a diplomatic protest about the incident.[60][61] However, this story is comprehensively denied by the crew members of STS-41-G and knowledgeable members of the US intelligence community.[62]

Future

Currently, the technology is being considered for non-military use to protect Earth from asteroids.[63]

Non-lethal weapons

The TECOM Technology Symposium in 1997 concluded on non-lethal weapons, "determining the target effects on personnel is the greatest challenge to the testing community", primarily because "the potential of injury and death severely limits human tests".[64]

Also, "directed energy weapons that target the central nervous system and cause neurophysiological disorders may violate the Certain Conventional Weapons Convention of 1980. Weapons that go beyond non-lethal intentions and cause "superfluous injury or unnecessary suffering" may also violate the Protocol I to the Geneva Conventions of 1977."[65]

Some common bio-effects of non-lethal electromagnetic weapons include:

Interference with breathing poses the most significant, potentially lethal results.

Light and repetitive visual signals can induce epileptic seizures. Vection and motion sickness can also occur.

Cruise ships are known to use sonic weapons (such as LRAD) to drive off pirates.[66]

See also

Notes

  1. "Daily Telegraph, 12th September 2013", Golden Eye-style energy beam is developed by Nato scientists, Oct. 08, 2013
  2. "Milsat Magazine, Satnews Daily, June 24th 2009", U.S. Navy Laser Versus UAVs... Laser Wins..., Oct. 08, 2013
  3. Thaad-ER In Search Of A Mission - Aviationweek.com, 20 January 2015
  4. "Defence IQ talks to Dr Palíšek about Directed Energy Weapon systems", Defence iQ', Nov. 20, 2012
  5. Spectrum Tutorial, University of Wisconsin Electromagnetic Spectrum Tutorial, accessed 22/06/2013
  6. RF vs Microwave Freq range, Microwaves and radio waves
  7. "The Pentagon's Ray Gun". CBS News. 2008-06-01. Retrieved 2009-03-30.
  8. Raytheon focuses on non-lethal weapons,Andrew Johnson, (The Arizona Republic, 09-17-2009)
  9. Archived August 25, 2010, at the Wayback Machine.
  10. Magnus Karlsson (2009). "Bofors HPM Blackout". Artilleri-Tidskrift (2-2009): s. s 12-15. Retrieved 2010-01-04.
  11. Google search
  12. 1 2 Fulghum, David A. (2005-12-17). "Israel tests improved Arrow interceptor". Aviation Week & Space Technology. Retrieved 2009-08-19.
  13. David A. Fulghum & Douglas Barrie (2005-09-06). "Radar Becomes A Weapon". Aviation Week & Space Technology. Retrieved 2014-05-16.
  14. Colonel of Aviation Grigoriy "Grisha" Medved (retd) (2008-04-13). "Grisha's Radar fry-off". Air Power Australia. Retrieved 2014-05-16.
  15. Mark Harris (27 May 2009). "US cops and military to get laser guns". Techradar.com. Retrieved 28 July 2010.
  16. Chris Matyszczyk (23 July 2010). "Police to experiment with blinding 'Dazer Laser'?". CNET.com. Retrieved 28 July 2010.
  17. Eva D. Blaylock (Air Force Research Laboratory Directed Energy Directorate Public Affairs). New technology 'dazzles' aggressors, The Official Website of the U.S. Air Force, Posted November 2, 2005
  18. "United Nations Office at Geneva". www.unog.ch. Retrieved 15 January 2009.
  19. PERSONNEL HALTING and STIMULATION RESPONSE (PHaSR) Fact Sheet, Air Force Research Laboratory, Office of Public Affairs, April 2006; Archived
  20. Waldman, Harry (1988). The Dictionary of SDI. New York: Rowman & Littlefield. pp. 58, 157–158. ISBN 0842022953.
  21. F. J. Duarte, W. E. Davenport, J. J. Ehrlich, and T. S. Taylor, Ruggedized narrow-linewidth dispersive dye laser oscillator, Opt. Commun. 84, 310-316 (1991).
  22. Joint High Power Solid-State Laser fact sheet, Northrop Grumman Corporation, April 22, 2008
  23. Pae, Peter, "Northrop Advance Brings Era Of The Laser Gun Closer", Los Angeles Times, March 19, 2009., p. B2.
  24. Northrop Grumman (2010-04-07). "Navy Shows Off Powerful New Laser Weapon". Foxnews.com. Retrieved 2011-09-25.
  25. Emery, Daniel (2010-07-19). "BBC News - Anti-aircraft laser unveiled at Farnborough Airshow". Bbc.co.uk. Retrieved 2011-09-25.
  26. MLD Test Moves Navy a Step Closer to Lasers for Ship Self-Defense, official press release, 4/8/11.
  27. Navy tests laser gun by zapping motorboat off California coast, LA Times, 4/11/11.
  28. Luis Martinez (9 Apr 2013). "Navy's New Laser Weapon Blasts Bad Guys From Air, Sea". ABC. Retrieved 9 April 2013.
  29. Air Force Link News story on the PHaSR handheld rifle-style weapon. 2 November 2005.
  30. Wired News article "Weapons Freeze, Microwave Enemies" (and copied in at least 661 other web pages including this link) Archived June 14, 2006, at the Wayback Machine.
  31. Boeing YAL-1 Airborne Laser (ABL) | Photos and Pictures
  32. U.S. Army's vehicle-mounted High Energy Laser Mobile Demonstrator shoots down UAVs, mortar rounds - Laserfocusworld.com, 13 December 2013
  33. Lockheed Martin Wins Contract To Develop Weapons Grade Fiber Laser For U.S. Army Field Test - Providencejournal.com, 24 April 2014
  34. "Jefferson Lab FEL". Retrieved 2009-06-08.
  35. "Airborne megawatt class free-electron laser for defense and security". Retrieved 2007-12-21.
  36. "Raytheon Awarded Contract for Office of Naval Research's Free Electron Laser Program". Retrieved 2009-06-12.
  37. "Boeing Completes Preliminary Design of Free Electron Laser Weapon System". Retrieved 2010-03-29.
  38. "Breakthrough Laser Could Revolutionize Navy's Weaponry". Fox News. 2011-01-20. Retrieved 2011-01-22.
  39. "The Leading Mil Net Site on the Net". milnet.com. Retrieved 2012-06-12.
  40. Atomic Rocket: Space War: Weapons
  41. US lasers? PLA preparing to raise its deflector shields - SCMP.com, 10 March 2014
  42. "Energy Citations Database (ECD) - - Document #7369133". Osti.gov. doi:10.1063/1.860681. Retrieved 2012-06-12.
  43. http://bgr.com/2015/10/19/handheld-railgun-video-3d-printing/
  44. Naval Submarine Medical Research Laboratory (Groton, Connecticut), Navy Experimental Diving Unit (Panama City, Florida), SCC San Diego, Navy Medical Research and Development Command (Bethesda, Maryland), Underwater Sound Reference Detachment of Naval Undersea Warfare Center (Orlando, Florida), Applied Research Laboratories: University of Texas at Austin, Applied Physics Laboratory: University of Washington, Institute for Sensory Research: Syracuse University, Georgia Institute of Technology, Emory University, Boston University, The University of Vermont, Applied Physics Laboratory, Johns Hopkins University, Jet Propulsion Laboratory, University of Rochester, University of Minnesota, University of Illinois system, Loyola University, State University of New York at Buffalo, New York
  45. "Non-Lethal Swimmer Neutralization Study"; Applied Research Laboratories; The University of Texas at Austin; G2 Software Systems, Inc., San Diego; TECHNICAL DOCUMENT 3138; May 2002 Non-Lethal Swimmer Neutralization Study Archived February 10, 2012, at the Wayback Machine.
  46. Applications - LRAD Corporation website
  47. Corbett, Peter (2009). A Modern Plague of Pirates. p. 65. ISBN 0-9562107-0-8.
  48. LRAD Corporation website
  49. Bill Sweetman. "Directed-Energy Weapons: No Longer Science Fiction Aviation Week & Space Technology, 2015. Archive
  50. Archimedes Death Ray: Idea Feasibility Testing
  51. Jones, R.V. (1978). Most Secret War: British Scientific Intelligence 1939–1945. Coronet. pp. 84,124. ISBN 0-340-24169-1.
  52. "Turning Up The Heat: Latest Evolution Of Lockheed Martin Laser Weapon System Stops Truck In Field Test" (Press release). Lockheed Martin. March 3, 2015. Retrieved April 8, 2015.
  53. Seifer, Marc J., Wizard, the Life and Times of Nikola Tesla. ISBN (HC) pg. 454.
  54. Martin O'Collins, director (21 February 2006). "Weird Weapons: The Axis". Modern Marvels. Season 12. Episode 8. The History Channel.
  55. "Forschungsstätte für Hitlers "Todesstrahlen"". Main-netz.de. 2009-08-19. Retrieved 2012-06-12.
  56. Wang, C. P. (Ed.), Proceedings of the International Conference on Lasers '85 (STS, McLean, Va, 1986).
  57. Duarte, F. J. (Ed.), Proceedings of the International Conference on Lasers '87 (STS, McLean, Va, 1988).
  58. U.S. Senate - Committee on Veterans Affairs: Hearings - Gulf War Illnesses; Testimony to the Senate Veterans Affairs Committee; Meryl Nass, MD, Director of Pulmonary Rehabilitation, Mount Desert Island Hospital Bar Harbor, Maine; September 25, 2007
  59. 1 2 Kononenko, Boris. "Silent Space Is Being Monitored". Retrieved 21 July 2011.
  60. 1 2 Zaloga, Steven. "RED STAR WARS". Retrieved 21 July 2011.
  61. "STS-41-G". Astronautix.com. Retrieved 2012-06-12.
  62. "End of the World 2013: DE-STAR Project Proposed after Asteroid 2012 DA14 Flyby, Russian Meteor Blast", International Business Times, Feb. 22, 2013
  63. Human Effects Advisory Panel Program; presented to: NDIANon-Lethal Defense IV
  64. Non-Lethal Weaponry: From Tactical to Strategic Applications; Colonel Dennis B. Herbert, USMC (Ret.), program developer, Institute for Non-Lethal Defense Technologies at Pennsylvania State University; pg. 4
  65. Smith, David (November 22, 2006). "Pirates shoot at Britons' cruise liner". The Guardian. London.

References

External links

This article is issued from Wikipedia - version of the 11/28/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.