Physics

NASA Awards Contract for Atmospheric Trace-Gas Monitoring Mission

NASA has awarded a contract to the University of Oklahoma in Norman for a first-of-its-kind Earth science mission that will extend our nation’s lead in measuring key carbon-based greenhouse gases and vegetation health from space to advance our understanding of Earth’s natural exchanges of carbon between the land, atmosphere and ocean.

Quantum thermometer or optical refrigerator?

In an arranged marriage of optics and mechanics, physicists have created microscopic structural beams that have a variety of powerful uses when light strikes them.

NASA Opens Media Credentialing for Sept. 15 Cassini Saturn Finale

Media accreditation is now open for events around the conclusion of Cassini's mission at Saturn. The spacecraft, which has explored the ringed planet and its moons since 2004, will make a fateful plunge into Saturn's atmosphere on Sept. 15, ending its long and discovery-rich mission.

NASA Selects Logistics Management Services Contractor

NASA has selected Lockwood Hills Federal, LLC of Herndon, Virginia, to provide institutional logistics management services for the agency’s Ames Research Center in Moffett Field, California.

Holey pattern boosts coherence of nanomechanical membrane vibrations

Researchers have introduced a new type of nanomechanical resonator, in which a pattern of holes localizes vibrations to a small region in a 30 nm thick membrane. The pattern dramatically suppresses coupling to random fluctuations in the environment, boosting the vibrations' coherence. The researchers' quantitative understanding and numerical models provide a versatile blueprint for ultracoherent nanomechanical devices. Among others, this enables a new generation of nanomechanical sensors to probe quantum limits of mechanical measurements, and more sensitive force microscopy.

Smooth propagation of spin waves using gold

Assistant Professor Taichi Goto at Toyohashi University of Technology elucidated the noise generation mechanism of the spin wave (SW), the wave of a magnetic moment transmitted through magnetic oxide, and established a way to suppress it. The large noise generated by SWs traveling through magnetic oxides has presented a significant obstacle to its applications. However, it became clear that noise can be suppressed by installing a thin gold film in the appropriate places.

Injector 2—a pre-accelerator for protons

As fundamental building blocks of matter, protons are a part of all things that surround us. At the Paul Scherrer Institute PSI, however, they step out of their usual role and are deployed to generate other particles, namely neutrons and muons, which are subsequently used to study materials. With this aim, the protons have first to be accelerated. An important role in this is played by a three-stage accelerator facility, in the middle of which stands the accelerator known as Injector 2.

NASA Prepares for Aug. 21 Total Solar Eclipse with Live Coverage, Safety Information

For the first time in 99 years, a total solar eclipse will occur across the entire continental United States, and NASA is preparing to share this experience of a lifetime on Aug. 21.

NASA Prepares for Aug. 21 Total Solar Eclipse with Live Coverage, Safety Information

For the first time in 99 years, a total solar eclipse will occur across the entire continental United States, and NASA is preparing to share this experience of a lifetime on Aug. 21.

Problem of wheeled suitcases wobbling explained

(Phys.org)—A team of researchers at Universite Paris-Diderot has uncovered the reason for wobbling of wheeled suitcases. In their paper published in Proceedings of the Royal Society A, the group explains the physics behind suitcase wobbling and offer some suggestions to overcome the problem.

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