![Using X-rays from SSRL, Chuntian Cao maps silicon as it cycles within a battery.](/sites/default/files/styles/card/public/2022-09/43904933314_a61b081f6e_k.jpg?h=a1e1a043&itok=CWQabSrP)
![FACET laser lab](/sites/default/files/styles/card/public/2022-09/FACET%20Laser%20Lab%20%282013_204_4733_FACET-LASER%29.jpg?h=1ae6bda6&itok=-xHyLvMN)
Photograph
Jeney Wierman stands in the control room of SSRL. She, along with other members of the Structural Molecular Biology team...
![Jeney Wierman of SLAC’s Structural Molecular Biology team](/sites/default/files/styles/card/public/2022-09/2020_0522_Stage_Zero_SSRL_McCulloch-5.jpg?h=6751341c&itok=wIfbBM1l)
![Images of frost and a thermometer superimposed over an aerial view of an accelerator building.](/sites/default/files/styles/card/public/lclsII_2k_cooldown_la_final.jpg?h=5a5fc591&itok=dpFqkhYx)
Illustration
A cross section of the LCLS-II accelerator showing where liquid and gaseous helium flow in and out of the system.
![Cross section showing pipes and liquid and gas helium](/sites/default/files/styles/card/public/lclsII_2k_cooldown_sv_cryomodule_final.jpg?h=0cd817c1&itok=YxvqtfF8)
![Cryoplant team](/sites/default/files/styles/card/public/2022-09/2021_0902_SLAC_Drone_Photos_Linac_Cryoplant_Tailgate_Bonin-54_0.jpg?h=f52e7eb6&itok=xRL8GRKq)
Photograph
The Laser Science and Technology (LST) division of the LCLS provides operational support for laser systems used in the LCLS...
![LCLS laser lab](/sites/default/files/styles/card/public/2022-09/2018_1002_2018_1002_LCLS_LST-45-Edit.jpg?h=4ff7faec&itok=AM_6a3f5)
![Using X-rays from SSRL, Chuntian Cao maps silicon as it cycles within a battery.](/sites/default/files/styles/card/public/2022-09/43904933314_a61b081f6e_k.jpg?h=a1e1a043&itok=CWQabSrP)
Photograph
SLAC staff gather in the accelerator control room to celebrate first light produced by the LCLS-II project’s pioneering superconducting accelerator.
![First light celebration](/sites/default/files/styles/card/public/2023-09/2023_0914_LCLS_II_First_Light_Celebration_Boyes-1-1180x726.jpg?h=2f3e7035&itok=GtVa1TtM)
Photograph
The original LCLS undulator system was removed and replaced with two totally new systems that offer dramatic new capabilities.
![New undulator hall](/sites/default/files/styles/card/public/2020_0306_Empty_Undulator_Hall_Gamazo-7843.jpg?h=56d0ca2e&itok=imB3yCp_)
![A schematic of a building with various pieces of cooling equipment.](/sites/default/files/styles/card/public/lclsII_2k_cooldown_sv_cryoplant_final.jpg?h=930a9827&itok=Zww49N9o)