Braun, J.J.BraunDay, P. K.P. K.DayToennies, J. P.J. P.ToenniesWitte, G.G.WitteNeher, ErwinErwinNeher2022-03-012022-03-011997https://resolver.sub.uni-goettingen.de/purl?gro-2/103622enMicrometer-sized nozzles and skimmers for the production of supersonic He atom beamsjournal_article10.1063/1.1148233