%0 Journal Article %T Hydrogen in the LCLS2 Beamline Vacuum %A Anthony C. Crawford %J Physics %D 2015 %I arXiv %X This note demonstrates that the cold segments of the LCLS2 linac will cryopump hydrogen for long periods of time, mitigating concerns for beam-residual gas interactions. %U http://arxiv.org/abs/1510.04912v1