![Cryomodule installation in the LCLS tunnel](/sites/default/files/styles/card/public/2022-09/2020_1119_Cryomodule_J1.3_20_Installation_Orrell-5.jpg?h=2fde8ad1&itok=83NR0RcQ)
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)
![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)
![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)
![Molecular movie filmstrip.](/sites/default/files/styles/card/public/2022-09/molecular_movie_filmstrip_final.jpg?h=42425d7c&itok=HKwNRy8F)
Animation
Now that the cavities have been cooled, the next step is to pump them with more than a megawatt of...
![Cryomodule cavity animation](/sites/default/files/lclsII_cooldown_pr_sv_rf_anim_final.gif)