The Linac Coherent Light Source (LCLS) offers researchers the first-ever high-energy or "hard" X-ray laser light produced in a laboratory. (Learn more about LCLS first science in the press release Science Begins at the World's Most Powerful X-ray Laser.)

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	Looking west, up the beamline, inside the LCLS Beam Transport Hall. The quadrupole magnet at left helps the electron beam maintain its precise shape before it enters the undulator magnets. (Photo: Brad Plummer. Click for larger image.)
	Looking east, downstream, inside the Undulator Hall, before installation of the undulator magnets. (Photo: Brad Plummer. Click for larger image.)
	Only 12 of a total 33 LCLS undulator magnets (silver-tone oblongs) were needed to create the first pulses of laser light. (Photo: Brad Plummer. Click for larger image.)
	A total of 33 LCLS undulator magnets like this one will create intense X-ray laser light from a pulse of electrons traveling near the speed of light. (Photo: Brad Plummer. Click for larger image.)
	Between each of the 33 undulator magnets, small quadrupole magnets (here, red) keep the electron pulses squeezed into tight bunches. (Photo: Brad Plummer. Click for larger image.)
	The initial stages of LCLS laser commissioning called for two-thirds of the 33 undulator magnets, as can be seen here. The remaining undulators will be installed this summer. (Photo: Brad Plummer. Click for larger image.)
	Looking east down the LCLS undulator array. Thirty-three LCLS undulator magnets will create intense X-ray laser light from a pulse of electrons traveling near the speed of light. (Photo: Brad Plummer. Click for larger image.)
	LCLS undulator magnets create intense X-ray laser light by jostling a pulse of electrons traveling near the speed of light. (Photo: Brad Plummer. Click for larger image.)
	Quadrupole focusing magnets between each of the 33 undulators guide electron pulses through the Linac Coherent Light Source. (Photo: Brad Plummer. Click for larger image.)
	A pair of grazing-incidence X-ray mirrors inside their vacuum tank. Mirrors such as these direct the LCLS beam into experimental stations downstream. (Photo: Brad Plummer. Click for larger image.)
	Several members of the LCLS commissioning team work in the Main Control Center. Paul Emma (center) spearheaded the lasing campaign. (Photo: Brad Plummer. Click for larger image.)
	Department of Energy Office of Science Deputy Director for Science Programs Patricia Dehmer toured the LCLS facility in 2008 during the final phase of construction. (Photo: Brad Plummer. Click for larger image.)
	Some of the LCLS team members stand by the newly installed undulators: (from right, all are from SLAC unless otherwise noted) Mike Zurawel, Geoff Pile from Argonne National Laboratory, Paul Emma, Dave Schultz, Heinz-Dieter Nuhn and Don Schafer. (Photo: Brad Plummer. Click for larger image.)