Tag Archives: diffraction

Bottling Up Sound Waves

By Guest PostNovember 1, 2014Scienceartificial nanoconstructs, astana process, berkeley lab, deep brain waves, diffraction, guarantor countries, hassan rouhani, john mcafee‏, metamaterials, news conference, ohrdrufer woelfin, old bull, peng zhang, recep tayyip erdogan, reflection, sound waves, tongcang li, xiang zhang, young bull

Acoustic Bottle Beams from Berkeley Lab Hold Promise for Imaging, Cloaking, Levitation and Other Apps

There’s a new wave of sound on the horizon carrying with it a broad scope of tantalizing potential applications, including advanced ultrasonic imaging and therapy, and acoustic cloaking, levitation and particle manipulation. Researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) have developed a technique for generating acoustic bottles in open air that can bend the paths of sound waves along prescribed convex trajectories. (more…)

Physicists Demonstrate the Acceleration of Electrons by a Laser in a Vacuum

By Guest PostMarch 6, 2013Scienceaccelerate an electron, acceleration effect, acceleration of electrons, acceleration phenomena, beam energy, bnl atf, brookhaven national laboratory, capture acceleration scenario, channel for electrons, david cline, diagnostic system, diffraction, electron, electron beam, fudan university, fusion, graph of data, higgs boson particle, higgs factory, Large Hadron Collider, laser in vacuum, laser intensity, lawson woodward theorem, lei shao, light in vacuum, muon collider, new york, phase distribution, phase velocity, produce excess energy, shanghai, simulation prediction, spectrometer, strong longitudinal electric, understanding the universe, vacuum laser, xiaoping ding, yu kun ho

Accelerating a free electron with a laser has been a longtime goal of solid-state physicists.

David Cline, a distinguished professor in the UCLA Department of Physics and Astronomy, and Xiaoping Ding, an assistant researcher at UCLA, have conducted research at Brookhaven National Laboratory in New York and have established that an electron beam can be accelerated by a laser in free space.

This has never been done before at high energies and represents a significant breakthrough, Cline said, adding that it also may have implications for fusion as a new energy source. (more…)