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Light Bending Material Facilitates Search for New Particles

Particle physicists have a hard time identifying all the elementary particles created in their particle accelerators. But now researchers at Chalmers University of Technology have designed a material that makes it much easier to distinguish the particles.

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Scientists Find Novel Way to Improve Laser Performance

Energy loss in optical systems, such as lasers, is a chief hindrance to their performance and efficiency and it occurs on an ongoing, frustrating basis. To help laser systems overcome loss, operators often pump the system with an overabundance of photons, or light packets, to achieve optical gain. But now, scientists from the School of Engineering & Applied Science at Washington University in St. Louis have shown a new way to reverse or eliminate such loss by, ironically, adding loss to a laser system to actually reap energy gains. In other words, they've invented a way to win by losing.

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1550 nm Pulsed Laser Diode

OSI Laser Diode, Inc. (LDI) (Edison, NJ) has introduced a 1550 nm pulsed laser diode with an integrated micro lens that delivers a far‑field beam pattern. The beam pattern's divergence is equivalent in both the Fast (perpendicular) and the Slow (parallel) axes of emission. The CVLL 350‑CL90 pulsed laser diode beam divergence (FWHM) is 8 x 8 degrees. The adjusted Far Field pattern offers high coupling efficiency when used with standard spherical lens systems. LDI's new device is RoHS compliant and operates in wavelengths ranging from 1530 nm to 1580 nm, with 1550 nm typical. The operating temperature is 25 degrees C, the pulse width is typically 150 nanoseconds, frequency is 5kHz, the drive current is at 75 W, and peak power is at 22 W.

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High-Res Line Camera Measures Magnetic Fields in Real Time

Scientists have developed a high‑resolution magnetic line camera to measure magnetic fields in real time. Field lines in magnetic systems such as generators or motors that are invisible to the human eye can be made visible using this camera. It is especially suitable for industrial applications in quality assurance during the manufacture of magnets.

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Sensors Monitor Dangerous Hits on the Football Field

In football, a tackle can supply 100 Gs of force or more, well above the amount that can cause a concussion and more than 10 times the force of an F‑16 jet roll maneuver. University of Florida (UF) researchers are using the helmets of Gator football players to help measure the force of on‑field hits to better understand and prevent concussions, and treat them before they cause lasting damage.

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Space-Based Instrument Monitors Plant Health

A new space‑based instrument to study how effectively plants use water is being developed at NASA's Jet Propulsion Laboratory. The ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) will monitor one of the most basic processes in living plants: the loss of water through the tiny pores in leaves, or transpiration. ECOSTRESS will measure combined evaporation and transpiration, known as evapotranspiration, from the International Space Station.

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Engineers Harvest and Print Parts for New Breed of Aircraft

Student interns and engineers at NASA's Ames Research Center rapidly prototyped and redesigned aircraft using 3D-printed parts. The aircraft was custom-built by repurposing surplus Unmanned Aerial Vehicles (UAVs). By lengthening the wings, the team was able to improve aerodynamic efficiency and help extend the flight time of small, lightweight electric aircraft. The prototype aircraft are constructed using components from Aerovironment RQ-14 Dragon Eye UAVs that NASA acquired from the United States Marine Corps via the General Services Administration's San Francisco office. Unmodified, these small electric aircraft weigh 5.9 pounds, have a 3.75-foot wingspan and twin electric motors, and can carry a one-pound instrument payload for up to an hour. After finalizing designs that featured longer and more slender wings and dual fuselages, the teams printed new parts including wing sections, nose cones, winglets, control surfaces, wing ribs and even propellers using the NASA Ames SpaceShop. The 3-D printed wing sections were reinforced using carbon fiber tubing or aluminum rods to give them extra strength without adding significant weight.Flying as high as 12,500 feet above sea level, multiple small converted Dragon Eye UAVs, including the specialized and highly modified “FrankenEye” platform, will study the chemistry of the eruption plume emissions from Turrialba volcano, near San Jose, Costa Rica. The goal of the activity is to improve satellite data research products, such as computer models of the concentration and distribution of volcanic gases, and transport-pathway models of volcanic plumes. Some volcanic plumes can reach miles above a summit vent, and drift hundreds to thousands of miles from an eruption site and can pose a severe public heath risk, as well as a potent threat to aircraft.SourceAlso: Learn about Real-Time Minimization of Tracking Error for Aircraft Systems.

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