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Solve Free Electron Laser Homework: XFEL, 25 GeV, Wave Lengths
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[QUOTE="hesus, post: 3111032, member: 252645"] [h2]Homework Statement [/h2] In the X-ray Free Electron Laser XFEL which is built at DESY in Hamburg a periodic magnetic structure (undulator) with a period λu = 5 cm forces electrons with an energy of 25 GeV to emit photons. This period determines the wave length of the photons emitted in the rest system of the moving electrons. - How long is the period of the magnet in the electron rest system? - What is the wave length of the emitted photons in the laboratory system? [b]2. Homework Equations and 3. The Attempt at a Solution [/b] Gamma-factor =E/m= 25GeV/511keV = 50000 But I'm struggling to have an image of this problem. Is the period in the electron rest system just the given period divided by the Gamma-Factor (length contraction)? And how is the photon wave length connected to the undulator period? Thanks for any hints. [/QUOTE]
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Solve Free Electron Laser Homework: XFEL, 25 GeV, Wave Lengths
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