Linac Coherent Light Source
LCLS on a Pedestal

Rows of undulators rest in the Collider Hall.
by Brad Plummer
Last week, a team working with the Linac Coherent Light Source (LCLS) construction project repositioned dozens of undulator magnets to make room for pre-assembly of the undulator support pedestals. For months, the undulators have remained stored in wooden crates in the Collider Hall, and now the first stages leading to their installation next year are set to begin.

"The most exciting thing for me is just seeing it all start to come together," said Ben Poling, leader of the group that will pre-assemble the undulator support systems. "I've been with this project since the beginning. It's really satisfying."

Poling and colleagues are currently making room among the rows of crates for the coming parade of related equipment—vacuum chambers, quadrupole magnets and beam position monitors that the team will soon start piecing together. Assembling these structures calls for a dedicated workspace furnished with high-precision mock-ups—actual replicas of the final support stands—for aligning the components, which Poling's group is currently setting up in the Collider Hall. The undulators will only be installed once the pedestals are in place in the Undulator Hall. In all, the LCLS will use 33 undulators at one time, with seven serving as back-ups.
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