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Unformatted text preview: magnets is about 6 Tesla. Assume an accelerator that follows the earths equator. What is the maximum beam energy for protons in such a machine? Consider two lenses of focal length f, one focusing, and the other defocusing. Show that the combination of the two lenses separated by a distance, d, with d<f, is always focusing, independent of whether the focusing or defocusing lens comes first. This is equivalent to showing that a quadrupole doublet with focusing and defocusing planes rotated by 90 degrees will have a net focusing effect. Hint: use the thing lens approximation and your favorite optics textbook (e.g. Hecht)...
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This note was uploaded on 12/30/2011 for the course PHYSICS 751 taught by Professor Eno during the Fall '11 term at Maryland.
 Fall '11
 ENO
 Physics, Charge, Work

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