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Topic: Storage ring

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	Storage ring - Wikipedia, the free encyclopedia
		A storage ring consists of a circular ring in which a particle beam or charged particles on a beamline from a particle accelerator can be kept circulating almost indefinitely.
		Storage of a particular particle is based on the mass of the particle being stored.
		Another very common use for storage rings is in the generation of synchrotron light for biological or chemical experiments.
	en.wikipedia.org /wiki/Storage_ring (615 words)

	The CESR Storage Ring (Site not responding. Last check: 2007-10-13)
		The storage ring uses the same guide field principle as the synchrotron--that is, particles travel in a circular orbit in vacuum under the influence of a magnetic field.
		Each electron or positron spends less than one-hundredth of a second in the synchrotron, but once it is transferred to the storage ring it must coast there for several hours.
		In the picture above, the storage ring is on the left side; sextuple (yellow) and quadropole (blue) focusing magnets can be seen in the foreground, with solenoidal bending magnets behind.
	w4.lns.cornell.edu /public/lab-info/ring.html (317 words)

	The CESR storage ring
		The Cornell Electron-positron Storage Ring (CESR) is an electron-positron collider with a circumference of 768 meters, located 12 meters below a parking lot and an athletic field on the scenic Cornell University campus.
		Electrons and positrons travel around the storage ring in bunches at 390 thousand revolutions per second (kHz), with 9 approximately evenly spaced bunch trains of two bunches of electrons each colliding with 18 similarly spaced bunches of positrons traveling in the opposite direction.
		In the storage ring alone more than 400 separate magnets must have their excitation currents set and monitored, often to an accuracy of 0.01%.
	www.lns.cornell.edu /public/lab-info/cesr.html (521 words)

	Experimental Facilities: The SPEAR Storage Ring (SLAC VVC)
		Stanford University has a long history of involvement in the development and use of colliding-beam storage rings for particle physics research.
		SPEAR consists of a single ring some 80 meters in diameter, in which counter-rotating beams of electrons and positrons were circulated at energies up to 4 GeV.
		At the beginning of SPEAR's operation, the x-rays (synchrotron radiation) given off by the particles as they moved around the curves in the storage ring were considered to be both a waste of energy and a practical nuisance by high energy physicists interested in particle physics.
	www2.slac.stanford.edu /vvc/experiments/spear.html (696 words)

	The Electron Storage Ring
		The 7-GeV electrons are injected into the 1104-m-circumference storage ring, a circle of more than 1,000 electromagnets and associated equipment, located in a concrete enclosure inside the experiment hall, which is large enough to encircle Chicago ’s U.S. Cellular Field.
		A powerful electromagnetic field focuses the electrons into a narrow beam that is bent on a circular path as it orbits within aluminum-alloy vacuum chambers running through the centers of the electromagnets.
		The sequencing, or lattice, of magnets in the APS storage ring (photo below) produces a beam of very small size and low angular divergence, qualities prized by users of synchrotron light sources.
	www.aps.anl.gov /About/APS_Overview/Storage_Ring/index.html (190 words)

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