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Topic: Particle accelerator


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In the News (Tue 19 Mar 19)

  
  Particle accelerator - Wikipedia, the free encyclopedia
In early particle accelerators a Cockcroft-Walton voltage multiplier was responsible for voltage multiplying.
DC accelerator types capable of accelerating particles to speeds sufficient to cause nuclear reactions are Cockcroft-Walton generators or voltage multipliers, which convert AC to high voltage DC, or Van de Graaff generators that use static electricity carried by belts.
A low-energy particle accelerator, an ion implanter is used in the manufacture of integrated circuits.
en.wikipedia.org /wiki/Particle_accelerator   (2138 words)

  
 Linear particle accelerator - Wikipedia, the free encyclopedia
As the particle bunch passes through the tube it is unaffected (the tube acts as a Faraday cage), while the frequency of the driving signal and the spacing of the gaps between electrodes is designed so that the maximum voltage differential appears as the particle crosses the gap.
Such accelerators are severely limited in accelerating power since at high voltage, energy is lost due to corona discharge, with electrical energy dissipated into the surrounding atmosphere.
The first linear accelerator with the accelerating cavities made of superconductor was built by HEPL on the Stanford campus, mostly for low- and intermediate-energy nuclear physics experiments.
en.wikipedia.org /wiki/Linear_particle_accelerator   (1269 words)

  
 particle accelerator. The Columbia Encyclopedia, Sixth Edition. 2001-05
Only charged particles (most commonly protons and electrons, and their antiparticles; less often deuterons, alpha particles, and heavy ions) can be artificially accelerated; therefore, the first stage of any accelerator is an ion source to produce the charged particles from a neutral gas.
In linear accelerators the particle path is a straight line; in other machines, of which the cyclotron is the prototype, a magnetic field is used to bend the particles in a circular or spiral path.
The early linear accelerators used high voltage to produce high-energy particles; a large static electric charge was built up, which produced an electric field along the length of an evacuated tube, and the particles acquired energy as they moved through the electric field.
www.bartleby.com /65/pa/partaccl.html   (1310 words)

  
 RTFTechnologies Particle Accelerator
Particle accelerators are designed to impart kinetic energy on charged particles by means of an applied electric field.
When a charged particle is subjected to an electric field it experiences a force proportional to the magnitude of the field, and therefore an acceleration.
Once the particles have gained a sufficient amount of energy they are collided with other particles (either matter or anti-matter) and the particles resulting from the collision is observed by a detector array.
www.rtftechnologies.org /physics/linac.htm   (1696 words)

  
 Particle accelerator - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-21)
One of the early particle accelerators responsible for development of the atomic bomb.
A particle accelerator is a device that uses electric fields to propel electrically charged particles to high speeds.
The largest and most powerful particle accelerators, such as the LHC and Tevatron, are used for experimental particle physics.
www.waxahachie.us /project/wikipedia/index.php/Particle_accelerator   (1824 words)

  
 Particle Adventure Glossary   (Site not responding. Last check: 2007-10-21)
The produced particles may be any combination allowed by conservation of energy and momentum and of all the charge types.
For most particle types (and every fermion type) there is another particle type that has exactly the same mass but the opposite value of all other charges (quantum numbers).
The rest mass (m) of a particle is the mass defined by the energy of the isolated (free) particle at rest, divided by the speed of light squared.
www.particleadventure.org /particleadventure/frameless/glossary.html   (1995 words)

  
 PARTICLE ACCELERATORS
Particle Accelerators are devices used to accelerate charged elementary particles or ions to high energies.
Particles are accelerated at one or more points on the ring each time the particles make a complete circle around the accelerator.
Accelerators are used to explore atomic nuclei, thereby allowing nuclear scientists to identify new elements and to explain phenomena that affect the entire nucleus.
www.egglescliffe.org.uk /physics/particles/newfolder/acc1.html   (1469 words)

  
 Articles - Particle accelerator   (Site not responding. Last check: 2007-10-21)
High-energy accelerators use a linear array of plates (or drift tubes) to which an alternating high-energy field is applied.
Low-energy accelerators such as s and X-ray generators use a single pair of electrodes with a DC voltage of a few thousand volts between them.
In contrast, particle physicists are increasingly using more massive particles such as protons in their accelerators to get to higher energies.
www.ezorange.com /articles/Particle_accelerator   (2027 words)

  
 Glossary: SLAC Virtual Visitor Center
The particles in the jet are chiefly hadrons
In the latter variety, the passage of the particle is synchronized with the phase of the accelerating field.
A photon is one of the fundamental particle
www2.slac.stanford.edu /vvc/glossary.html   (5563 words)

  
 Linear particle accelerator - Wikipedia, the free encyclopedia
If heavier particles are to be accelerated, (e.g.
Various target materials are used when protons or other nuclei are accelerated, depending upon the specific investigation.
Such devices are still used as ion injectors for other accelerating devices.
en.wikipedia.org /wiki/Linear_accelerator   (1269 words)

  
 BBC - h2g2 - Particle Accelerators - A305407
This device was used by Rolf Wideröe, a German physicist, to accelerate potassium and sodium to an energy of 710 keV to split the lithium atom.
One type of accelerator is the standing-wave linear accelerator; particles travel along a cylindrical vacuum tank through a series of drift tubes, separated by gaps.
The particles are forced into a circular path by the magnetic field; the electrodes are supplied with an alternating current that attracts and repels the particle, thus accelerating the particle.
www.bbc.co.uk /dna/h2g2/alabaster/A305407   (1410 words)

  
 Leach Science Center Auburn University
Although the 60Co pool source and accelerator remain as major facilities for faculty research, the name of the Center was changed in 1996 to the Leach Science Center to reflect the broader scope of scientific interests of the Center.
The heart of accelerator is a National Electrostatics Corporation 2 MV tandem accelerator equipped with an rf charge exchange ion source and a dedicated SNICS (source of negative ions from cesium sputtering)heavy ion source.
Use of the accelerator facility by organizations outside the academic community for applications such as trace elemental analysis is encouraged, and inquiries are welcome.
www.auburn.edu /academic/science_math/leach/docs   (1366 words)

  
 Accelerator: SLAC Virtual Visitor Center
The higher the energy of the accelerated particles, the more closely we can probe the structure of matter.
Particle accelerators come in two basic designs, linear (linac) and circular (synchrotron).
As you might suspect, operating an accelerator as large as the linac at SLAC is a challenging task.
www2.slac.stanford.edu /vvc/accelerator.html   (172 words)

  
 Particle Accelerator
This voltage is used to accelerate charged particles (ions) to 10% the speed of light.
The Particle Accelerator supplies high energy ions for a variety of purposes ranging from studies on the structure of the nucleus, interactions between nuclei, materials science, global climate change, bio-medicine and archaeology.
A beam of speeding nuclei emerges from the bottom of the accelerator for use in a range of investigations.
www.anu.edu.au /CSEM/machines/Accelerator.htm   (766 words)

  
 ABC News: Particle Accelerator Used to Decipher Text   (Site not responding. Last check: 2007-10-21)
A particle accelerator is being used to reveal the long-lost writings of the Greek mathematician Archimedes, hidden under the writing of a Christian monk in the Middle Ages.
BALTIMORE May 21, 2005 (AP)— A particle accelerator is being used to reveal the long-lost writings of the Greek mathematician Archimedes, work hidden for centuries after a Christian monk wrote over it in the Middle Ages.
Bergmann normally uses the accelerator, in which electrons are pushed to near the speed of light, to study the structure of water and how water is split to create oxygen during photosynthesis.
abcnews.go.com /Technology/wireStory?id=778258   (415 words)

  
 ganns.com - Particle Accelerator   (Site not responding. Last check: 2007-10-21)
Particle Accelerator is very possibly the simplest game that offers this much challenge.
Basically, all you have to do is synchronize your keypresses with the rotation of an accelerating particle, moving along a path which changes every ten rounds.
Your goal in Particle Accelerator is to keep the particle in motion around its path.
ganns.com /Games/ParticleAccelerator   (242 words)

  
 Straight Dope Staff Report: How does a particle accelerator work?
The more particles you have in the beam, and the more tightly bundled the particles are, the better chance you have that you'll get a collision that produces exciting new particles.
To get other types particles, you need to smash your accelerated protons or electrons into something else in order to produce other particles, then use some fancy particle selection techniques to separate the wheat from the chaff, as it were.
These focusing magnets have specialized magnetic fields, such that if a particle is straying to the right, the magnet steers it a little to the left, but if the particle is straying to the left, it gets steered a little to the right.
www.straightdope.com /mailbag/maccelerator.html   (1382 words)

  
 United Nuclear - Linear Accelerator   (Site not responding. Last check: 2007-10-21)
The actual accelerator tube itself is fabricated from thick-wall glass pipe.
The glass pipe, along with all components that are external to the control building are encased in ordinary PVC pipe to protect them from the weather.
At higher power levels, the accelerator is operated remotely from the main building.
www.unitednuclear.com /fwa1.htm   (249 words)

  
 BBC NEWS | Science/Nature | Cosmic particle accelerator seen
And the team that found it believes the vast, bizarre structure could be some form of cosmic particle accelerator.
If this is so, the loop could be generating high-energy particles with an energy of up to one thousand trillion electron volts.
Particles such as these have been detected previously in supernova remnants and pulsar nebulae.
news.bbc.co.uk /1/hi/sci/tech/4423975.stm   (325 words)

  
 Inquiring Minds
Physicists use high-energy accelerators to probe matter at the smallest scale.
Creating tiny fireballs of high density and high temperature, physicists produce the particles that were abundant in the early universe, a trillionth of a second after the Big Bang.
They study the properties of and forces among particles to test and develop theoretical models to explain matter, space and time, the fundamental structure of our universe.
www.fnal.gov /pub/inquiring/physics/accelerators   (267 words)

  
 Particle Accelerators: Curators Statement
The particle accelerator, popularly called an atom smasher, is such an image and technology of this astounding technological age.
A kind of high powered version of our childhood marbles game on the level of atoms, the particle accelerator is one of many phenomenal marriages of technology and science to produce wondrous visions of worlds far beyond the capacity of the unaided eye.
The artists in Particle Accelerators are for the most part concerned with a poetic reconstruction of the images, events, discoveries, subjects, and methodologies of science, in altering our actual perception of the scientific discourse, rather than proving or promoting its hypotheses and theorem.
www.bu.edu /prc/particle/state.html   (813 words)

  
 902 KAR 100:155. Particle accelerator.
The purpose of this administrative regulation is to provide radiation safety requirements for particle accelerator operations.
(9) Circuit diagrams of the accelerator and the associated interlock systems shall be kept current and maintained for inspection by the cabinet and shall be available to the operator.
The monitoring devices shall be electrically independent of the accelerator control and safety interlock systems and capable of providing a readout at the control panel.
www.lrc.state.ky.us /kar/902/100/155.htm   (1487 words)

  
 Raw energy: The latest on the high-energy particle accelerator | csmonitor.com   (Site not responding. Last check: 2007-10-21)
From that energy, physicists say, new particles are expected to form - and quickly decay - that could open windows on the workings of the fledgling universe and perhaps explain such conundrums as the origins of particles' masses.
Because both particles are made of more-fundamental particles called quarks, each time a proton and an antiproton collide, the collision actually takes place between three quarks in the proton and three antiquarks in the antiproton.
Called the Higgs boson, it is the last undetected particle in the grand edifice of physics known as the Standard Model, which describes the known fundamental particles and the forces that act on them.
www.csmonitor.com /2001/0823/p15s1-stss.html   (1459 words)

  
 25 April 2005 - Brookhaven: Brookhaven Lab Physicist Thomas Roser Wins 2005 Particle Accelerator Science and Technology ...   (Site not responding. Last check: 2007-10-21)
Physicists probe the resulting jets of particles in an attempt to understand how the spin of protons is related to the spin of their component parts, quarks and gluons.
Normally, the spin direction of protons is random, but the spin has to be polarized, or spinning in the same direction, to study the particles.
He joined the University of Michigan in 1984 as a research fellow and was appointed assistant professor of physics at the university in 1990.
www.interactions.org /cms?pid=1019595   (521 words)

  
 Particle accelerator - ILC - What is the ILC?   (Site not responding. Last check: 2007-10-21)
A device, such as a cyclotron or linear accelerator, that accelerates charged subatomic particles or nuclei to high energies.
There are more than ten thousand particle accelerators in the world from the linear accelerators used for cancer therapy in modern hospitals to the giant
Proceedings of the · Particle Accelerator Conference, 2001.
bestwebitem.com /bw/particle-accelerator.html   (430 words)

  
 particle accelerator
particle accelerator: Design of Particle Accelerators - Design of Particle Accelerators There are many types of accelerator designs, although all have...
particle accelerator: Circular Accelerators - Circular Accelerators In order to reach high energy without the prohibitively long paths required...
particle accelerator: Linear Accelerators - Linear Accelerators The early linear accelerators used high voltage to produce high-energy...
www.factmonster.com /ce6/sci/A0837743.html   (185 words)

  
 IEEE NPSS Particle Science and Technology Award
Roser is Associate Chair for Accelerators and Accelerator Division Head at the Collider-Accelerator Department of Brookhaven National Laboratory.
For many fundamental accelerator concepts which include invention of Fixed Field Alternating Gradient Accelerators (FFAG), most notably incorporated into spiral sector cyclotrons; for defining a formalism describing motion under the influence of RF as required for stacking and other particle manipulations; and for techniques for analyzing collective instabilities.
The PAST Award is sponsored by the Particle Accelerator Science and Technology Technical Committee (PAST) of the IEEE Nuclear and Plasma Sciences Society.
www.ewh.ieee.org /soc/nps/pastaward.html   (568 words)

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