Physics

New test bed probes the origin of pulses at LCLS

It all comes down to one tiny spot on a diamond-cut, highly pure copper plate. That's where every X-ray laser pulse at SLAC's Linac Coherent Light Source gets its start. That tiny spot must be close to perfect or it can impair and even halt LCLS operations.

The ferromagnetic Kondo effect: A circuit simulates an effect predicted by physicists but never actually observed

A group of physicists has shown how to obtain a particular case of a physical effect -- so far never observed in reality -- whose studies have earned a Nobel Prize. The scientists have also observed the response of the material subject to such effect. These observations will provide precious indications to the experimental physicists in order to verify, in the future, their theory.

NASA Deputy Administrator Media Availability at NewSpace 2013 on July 26

NASA Deputy Administrator Lori Garver will hold a media availability at the NewSpace 2013 conference in Silicon Valley, Calif., on Friday, July 26.

Tropical Ecosystems Boost Carbon Dioxide as Temperature Rises

NASA scientists and an international team of researchers have found tropical ecosystems can generate significant carbon dioxide when temperatures rise, unlike ecosystems in other parts of the world.

NASA Selects Contract for Information Technology Services

NASA has awarded Arctic Slope Regional Corp. (ASRC) Federal Research and Technology Solutions of Greenbelt, Md., for information technology (IT) services at the agency's Ames Research Center in Moffett Field, Calif.

NASA Discusses First IRIS Solar Images in Media Teleconference

NASA will host a media teleconference at 1 p.m. EDT Thursday, July 25, to present the first images from NASA's Interface Region Imaging Spectrograph (IRIS), which was launched June 27 on a mission to study the sun.

Tenth Parachute Test for NASA's Orion Adds 10,000 Feet of Success

A complicated, high-altitude test Wednesday demonstrated NASA's new Orion spacecraft could land safely even if one of its parachutes failed.

Protons hop from one water molecule to another given suitable energy conditions

Protons, as positively charged hydrogen ions, move very rapidly in water from one water molecule to the next, which is why the conductivity of water is relatively high. The principle of proton conduction in water has been known for 200 years and is named the Grotthuss mechanism after its discoverer, Theodor Grotthuss. It is based on the assumption that it is not that a single specific proton moving from one molecule to another; instead, there is cleavage of bonds.

NASA Invites Media to Space Station Astronaut-Robot Test

An astronaut aboard the International Space Station will control NASA's K10 planetary rover at the agency's Ames Research Center in Moffett Field, Calif., from 8-11 a.m. PDT Friday, July 26, and media are invited to watch.

NASA'S Spitzer Observes Gas Emission From Comet Ison

Astronomers using NASA's Spitzer Space Telescope have observed what most likely are strong carbon dioxide emissions from Comet ISON ahead of its anticipated pass through the inner solar system later this year.

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