News tagged with electron beam
'Dark plasmons' transmit energy
Microscopic channels of gold nanoparticles have the ability to transmit electromagnetic energy that starts as light and propagates via "dark plasmons," according to researchers at Rice University.
Feb 09, 2012 |
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Researchers at SLAC test collider closer to creating fully coherent X-rays
(PhysOrg.com) -- Many advanced laser technologies, such as laser spectroscopy, that use precise wavelengths of infrared, visible or ultraviolet laser light could benefit from using X-ray light as well. But ...
Feb 01, 2012 |
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Ultra-fast photodetector and terahertz generator
Photodetectors made from graphene can process and conduct light signals as well as electric signals extremely fast. Within picoseconds the optical stimulation of graphene generates a photocurrent. Until now, ...
Jan 31, 2012 |
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Seeing quantum mechanics with the naked eye
(PhysOrg.com) -- A Cambridge team have built a semiconductor chip that converts electrons into a quantum state that emits light but is large enough to see by eye. Because their quantum superfluid is simply ...
Jan 09, 2012 |
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Flipping an egg carton of light traps giant atoms
(PhysOrg.com) -- In an egg carton of laser light, University of Michigan physicists can trap giant Rydberg atoms with up to 90 percent efficiency, an achievement that could advance quantum computing and terahertz ...
Dec 23, 2011 |
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Catching tokamak fastballs: Controlling runaway electrons
a leading design concept for producing nuclear fusion energy—can, under certain rare fault conditions, produce beams of very energetic "runaway" electrons that have the potential to damage interior surfaces ...
Nov 11, 2011 |
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Scientists carve nanowires out of ultrananocrystalline diamond thin films
A team of scientists working at Argonne National Laboratory's (ANL) Center for Nanoscale Materials has successfully carved ultrananocrystalline diamond (UNCD) thin films into nanowires, boosting the material's functionality ...
Nov 04, 2011 |
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Electron accelerator scientists report breakthroughs
(PhysOrg.com) -- Cornell scientists have surpassed two major scientific milestones toward proving the technology of a novel, exceedingly powerful X-ray source.
Oct 25, 2011 |
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Sterilization method for hemodialysis dialyzer membrane linked with risk of low platelet counts
Patients who had undergone hemodialysis using dialyzers that had been sterilized with the use of electron beams were more likely to develop thrombocytopenia (an abnormally low platelet count in the blood, associated with ...
Oct 18, 2011 |
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Nanowire lens can reconfigure its imaging properties
(PhysOrg.com) -- By taking advantage of the unique optical properties of nanoscale materials, researchers have designed a lens made of nanowires that can reconfigure its imaging properties without any electronic ...
Oct 11, 2011 |
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'Low tech' light in neutron beam illuminates photosynthesis in bacteria
(PhysOrg.com) -- Researchers at the Bio-SANS instrument at the High Flux Isotope Reactor are getting a leg up in their research from an ingenious "low tech" lighting tool that can be fixed to their samples ...
Chemistry / Analytical Chemistry
Sep 28, 2011 |
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Beams to order from table-top accelerators
Laser plasma accelerators offer the potential to create powerful electron beams within a fraction of the space required by conventional accelerators – and at a fraction of the cost. Their promise for ...
Aug 22, 2011 |
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Getting positive results with negative ions
Yes! That's the answer scientists from OI Analytical and Pacific Northwest National Laboratory got from their experiments to see if the new IonCCDTM can detect negative ions and large ions. Furthermore, employing ...
Jul 18, 2011 |
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First X-ray lasing of SACLA
RIKEN and the Japan Synchrotron Radiation Research Institute (JASRI) have successfully produced a first beam of X-ray laser light with a wavelength of 1.2 Angstroms. This light was created using SACLA, a cutting-edge X-ray ...
Jun 17, 2011 |
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Research team develops method to produce large sheets of metamaterials
(PhysOrg.com) -- In an announcement many have been waiting for, a research team from the University of Illinois, has succeeded in figuring out how to produce metamaterials in a size big enough to be useful. ...
Nanotechnology / Nanomaterials
Jun 15, 2011 |
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Cathode ray
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.
For more information about Cathode ray, read the full article at
Wikipedia.
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