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J5-31. Quadrupole Magnetic Field
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J5-31. Quadrupole Magnetic Field
Purpose
To visualize the magnetic field of a quadrupole magnet.
Equipment
Two horseshoe magnets with plastic box for iron filings, overhead projector.
Images
Description
Two large horseshoe magnets are arranged with their poles N to S and S to N, forming a "quadrupole." Quadrupole magnets are used in focusing of charged particle beams, where the beam moves through the field perpendicular to the pla ne of the magnets. A single quadrupole focuses in one direction and defocuses in the other direction, so quadrupole magnets are generally used in pairs as beam focusing magnets.
References
Richard L. Taylor, Focusing Electron Beams at SLAC, TPT 31, 18-26 (1993).
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See pagesj1. electrostatic charge & force
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See pagesj3. electric fields & potential
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See pagesj4. capacitance & polarization
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See pagesj5. magnetostatics
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See pagesj6. electromagnets
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See pagesj7. magnetic materials
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See pagesj1. electrostatic charge & force
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See pagesj3. electric fields & potential
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See pagesj4. capacitance & polarization
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See pagesj5. magnetostatics
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See pagesj6. electromagnets
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See pagesj7. magnetic materials
Physics Lab Demos