Plasmonic metasurfaces are artificial 2-D sheets of plasmonic unit cells repeated in a subwavelength array, which give rise to unexpected wave properties that do not exist in nature. In the linear regime, their applications ...
Optics & Photonics
May 26, 2020
0
5
High-energy polarized electron beams are widely used in high-energy physics (linear colliders), nuclear physics and material science. However, such polarized electron beams are usually generated on conventional accelerators ...
General Physics
May 26, 2020
0
4
A team of scientists has come up with a way to improve electron bunches and produce brighter X-ray beams: Put a ring on them. The team, which includes researchers from the Department of Energy's SLAC National Accelerator ...
General Physics
Apr 27, 2020
0
68
NASA's "Send Your Name to Mars" campaign invited people around the world to submit their names to ride aboard the agency's next rover to the Red Planet. Some 10,932,295 people did just that. The names were stenciled by electron ...
Space Exploration
Mar 27, 2020
0
19
Different structured materials have different properties and applications. Disclosing the formation mechanism of material structures may help develop routes for the rational synthesis. However, how the materials structures ...
Materials Science
Mar 20, 2020
0
5
Visualizing the structure of viruses, proteins and other small biomolecules can help scientists gain deeper insights into how these molecules function, potentially leading to new treatments for disease. In recent years, a ...
General Physics
Mar 17, 2020
0
7
Monash University researchers in Australia have used a combination of atomic-scale imaging and simulations to improve the understanding of the theta-prime strengthening phase in the aluminium copper alloy system.
Materials Science
Mar 11, 2020
0
14
When neutrinos crash into water molecules in the billion-plus tons of ice that make up the detector at the IceCube Neutrino Observatory in Antarctica, more than 5,000 sensors detect the light of subatomic particles produced ...
General Physics
Feb 25, 2020
1
76
Researchers at the National Institute of Standards and Technology (NIST) and their collaborators have developed a way to retrofit the transmission electron microscope—a long-standing scientific workhorse for making crisp ...
Optics & Photonics
Feb 24, 2020
0
77
Understanding the structure of proteins, the building blocks of life, is essential to obtain insight into their biological function. Due to their minute size and extreme fragility, these structures are enormously difficult ...
Analytical Chemistry
Feb 21, 2020
0
233
Cathode rays (also called an electron beam or e-beam) are streams of electrons observed in vacuum tubes, i.e. evacuated glass tubes that are equipped with at least two metal electrodes to which a voltage is applied, a cathode or negative electrode and an anode or positive electrode. They were discovered by German scientist Johann Hittorf in 1869 and in 1876 named by Eugen Goldstein kathodenstrahlen (cathode rays). Electrons were first discovered as the constituents of cathode rays. In 1897 British physicist J. J. Thompson showed the rays were composed of a previously unknown negatively charged particle, which was named electron.
This text uses material from Wikipedia, licensed under CC BY-SA
