@book{HelsperBesslingKiocketal.1979, author = {Helsper, Christoph and Beßling, Harro and Kiock, R. and Fißan, H. J.}, title = {Experimentelle Untersuchung der Partikelanzahlkonzentration im Windkanal f{\"u}r den Einsatz von laseranemometrischen Verfahren / Beßling, Harro; Kiock, R.; Helsper, C.; Fißan, H. J.}, publisher = {DFVLR}, address = {K{\"o}ln}, pages = {48 S.}, year = {1979}, language = {de} } @article{HelsperBartzFissanetal.1985, author = {Helsper, Christoph and Bartz, H. and Fißan, H. J. and Kousaka, Y. (u.a.)}, title = {Response Characteristics for Four Condensation Nucleus Counters to Particles in the 3 to 50 nm Diameter Range / Bartz, H. ; Fißan, H. J. ; Helsper, C.; Kousaka, Y. ; Okuyama, K. ; Keady, R. Fruin, S. ; McMurry, P. H.; Pui, D. Y. H. ; Stolzenburg, M. R.}, series = {Journal of Aerosol Science. 16 (1985), H. 5}, journal = {Journal of Aerosol Science. 16 (1985), H. 5}, isbn = {0021-8502}, pages = {443 -- 456}, year = {1985}, language = {en} } @article{HelsperBartz1987, author = {Helsper, Christoph and Bartz, H.}, title = {Theoretische Bestimmung des Abscheidegrades eines Filters bei verschiedenen Betriebszust{\"a}nden / Bartz, H. ; Helsper, C.}, series = {Staub, Reinhaltung der Luft. 47 (1987)}, journal = {Staub, Reinhaltung der Luft. 47 (1987)}, isbn = {0039-0771}, pages = {112 -- 114}, year = {1987}, language = {de} } @article{Helsper1986, author = {Helsper, Christoph}, title = {Kondensationskernz{\"a}hler und ihre Anwendung in der Reinraumtechnik}, series = {Swiss Chem. 8 (1986)}, journal = {Swiss Chem. 8 (1986)}, isbn = {0251-1703}, pages = {63 -- 66}, year = {1986}, language = {de} } @article{Helsper1986, author = {Helsper, Christoph}, title = {Measurement Techniques For Ultrafine Particles}, series = {Ultrafine aerosols. Properties and behaviour. Proceedings of the 1. International Workshop on Ultrafine Aerosols of the Sonderforschungsbereich 209 'Stoff- und Energietransport in Aerosolen' -'Mass and energy transfer in aerosols'-, held at the Univ. of Duisburg on Sept. 29, 1986}, journal = {Ultrafine aerosols. Properties and behaviour. Proceedings of the 1. International Workshop on Ultrafine Aerosols of the Sonderforschungsbereich 209 'Stoff- und Energietransport in Aerosolen' -'Mass and energy transfer in aerosols'-, held at the Univ. of Duisburg on Sept. 29, 1986}, address = {Duisburg}, year = {1986}, language = {en} } @article{Helsper1979, author = {Helsper, Christoph}, title = {Evaluation of Particle Size Distributions by Means of Particle Counters / Fißan, H. J. ; Helsper, C.}, series = {Proceedings of the First Workshop of Particulate Control : 16. - 17. March 1978, Kernforschung-sanlage J{\"u}lich GmbH / prepared by U.S. Environmental Protection Agency, Off. of Research and Development, Washington, D.C, 1979,}, journal = {Proceedings of the First Workshop of Particulate Control : 16. - 17. March 1978, Kernforschung-sanlage J{\"u}lich GmbH / prepared by U.S. Environmental Protection Agency, Off. of Research and Development, Washington, D.C, 1979,}, publisher = {Zentralbibliothek d. Kernforschungsanlage J{\"u}lich [in Komm.]}, address = {J{\"u}lich}, pages = {495 S.: Ill., graph. Darst.}, year = {1979}, language = {en} } @book{Helsper1981, author = {Helsper, Christoph}, title = {Bestimmung, Simulation und Korrektur des nichtidealen {\"U}bertragungsverhaltens klassifizierender Aerosolmeßverfahren}, publisher = {Univ.-Gesamthochsch}, address = {Duisburg}, pages = {65 S.}, year = {1981}, language = {de} } @article{Helsper1988, author = {Helsper, Christoph}, title = {Kondensationskernz{\"a}hler in der Reinraummeßtechnik - Meßbereichsgrenzen nach unten verschoben}, series = {Reinraumtechnik. 5 (1988)}, journal = {Reinraumtechnik. 5 (1988)}, pages = {36 -- 39}, year = {1988}, language = {de} } @article{Helsper1993, author = {Helsper, Christoph}, title = {Integrit{\"a}tspr{\"u}fung an LF-Anlagen mit Hilfe von Pr{\"u}faerosolen}, series = {Pharma-Technologie-Journal. 14 (1993), H. 2}, journal = {Pharma-Technologie-Journal. 14 (1993), H. 2}, isbn = {0931-9700}, pages = {36 -- 42}, year = {1993}, language = {de} } @article{Helsper1995, author = {Helsper, Christoph}, title = {Probleme der Staubprobenahme bei der Filterpr{\"u}fung}, series = {Filtrieren und Separieren (1995)}, journal = {Filtrieren und Separieren (1995)}, isbn = {0933-5927}, pages = {5 -- 13}, year = {1995}, language = {de} }