Magnet Basics
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Electromagnets, like this quadrupole ("four-pole") magnet, focus particle beams in the accelerator. There are four steel pole tips, two opposing magnetic north poles and two opposing magnetic south poles. The steel is magnetized by a large electric current that flow in the coils of tubing wrapped around the poles. |
| Water flows inside the tubing to cool the magnet. The magnet's coil structure is visible in the cut-out section. |  |
