LCLS-II undulators


The second phase of a major upgrade project is now online at SLAC’S Linac Coherent Light Source (LCLS). On Saturday, scientists ushered an electron beam through a new undulator to produce “soft” X-rays (left). This follows the upgraded facility’s first light in July, produced with another undulator that generates “hard” X-rays (right).

Greg Stewart/SLAC National Accelerator Laboratory

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