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<p>or <a href="page.php?w=superconducting_magnet">superconducting magnet</a>s. The static <a href="page.php?w=magnetic_field">magnetic field</a> alternates along the length of the undulator with a wavelength . Electrons traversing the periodic magnet structure are forced to undergo oscillations and thus to radiate energy. The radiation produced in an undulator is very intense and concentrated in narrow energy bands in the spectrum. It is also <a href="page.php?w=collimated_light">collimated</a> on the orbit plane of the electrons. This radiation</p><p>
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