TY  - JOUR
A1  - Helsper, Christoph
T1  - Measurement Techniques For Ultrafine Particles
JF  - 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
Y1  - 1986
N1  - International Workshop on Ultrafine Aerosols ; (01)
CY  - Duisburg
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Mölter, W.
A1  - Willemer, W.
T1  - Fast and Automated Testing of Filter Media / Mölter, W. ; Helsper, C. ; Willemer, W.
JF  - FILTECH Conference 1987 : Utrecht, Holland; September 23 - 25 1987 / org. by the Filtration Society , Vol. 1.
Y1  - 1987
N1  - Filtech Conference ; (1987, Utrecht)
SP  - 106
EP  - 112
PB  - Filtration Society
CY  - Loughborough
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
T1  - Evaluation of Particle Size Distributions by Means of Particle Counters / Fißan, H. J. ; Helsper, C.
JF  - Proceedings of the First Workshop of Particulate Control : 16. - 17. March 1978, Kernforschung-sanlage Jülich GmbH / prepared by U.S. Environmental Protection Agency, Off. of Research and Development, Washington, D.C, 1979,
Y1  - 1979
N1  - Workshop of Particulate Control ; (1, 1978, Jülich); Berichte der Kernforschungsanlage Jülich Conferences ; 28
PB  - Zentralbibliothek d. Kernforschungsanlage Jülich [in Komm.]
CY  - Jülich
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
T1  - Numerical Simulation Studies and Data Reduction for Size Classifying Measurement Techniques / Fißan, H. J.; Helsper, C.
JF  - Aerosols in science, medicine and technology : conference / Gesellschaft für Aerosolforschung 7. 1979.
Y1  - 1979
SP  - 199
EP  - 205
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
T1  - Numerical Simulation Studies and Data Reduction for Size Classifying Measurement Techniques / Fißan, H. J.; Helsper, C.
JF  - Advances in Particle Sampling and Measurement: Proceedings, Daytona Beach, EPA 600/9 80 004, 1980
Y1  - 1980
N1  - Advances in Particle Sampling and Measurement ; (1979.10. : ; Daytona Beach/Fla.)
PB  - National Technical Information Service
CY  - Springfield, Va.
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
A1  - Muggli, J.
A1  - Scheidweiler, A.
T1  - Particle Number Distributions of Aerosols from Test Fires
JF  - Journal of Aerosol Science. 11 (1980), H. 5-6
Y1  - 1980
SN  - 0021-8502
SP  - 439
EP  - 446
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
T1  - Response Characteristic of a Polytec HC-15 Optical Particle Counter
JF  - Aerosols in science, medicine and technology : Physical and chemical properties of aerosols : Association for Aerosol Research: annual conference. 1980 : Gesellschaft für Aerosolforschung: annual conference. 1980 : Aerosols in science, medicine and technology : Physical and chemical properties of aerosols : Associa-tion for Aerosol Research: annual conference. 1980 : Gesellschaft für Aerosolforschung: annual conference. 1980 : Schmallenberg, 22.10.80 - 24.10.80
Y1  - 1981
N1  - Journal of aerosol science. Volume 0012 ; no 003
SP  - 287
EP  - 292
PB  - Pergamon Pr.
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
A1  - Kapadi, A.
A1  - Liu, B. Y. H.
T1  - Data Inversion by Simplex Minimization for the Electrical Aerosol Analyzer
JF  - Aerosol Science and Technology. 1 (1982), H. 1982
Y1  - 1982
SN  - 0278-6826
SP  - 136
EP  - 146
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Mölter, L.
T1  - Erzeugung von Prüfaerosolen für die Kalibrierung von optischen Partikelmeßverfahren nach VDI 3491
JF  - Technisches Messen. 56 (1989)
Y1  - 1989
SN  - 0171-8096
N1  - in der Bereichsbibliothek Jülich vorhanden: 63 ZS 008-1989
SP  - 229
EP  - 234
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Mölter, W.
A1  - Kaminski, S.
T1  - Fast and Automated Testing of Different Air Filter Media / Mölter, W. ; Helsper, C. ; Kaminski, S.
JF  - 1. Europäisches Symposium Partikelabscheidung aus Gasen : [PARTEC, Nürnberg, West Germany, 19. - 21. April 1989 ; preprints] = 1. European Symposium Separation of Particles from Gases / [Organisation und Durchführung: NürnbergMesse]. Hrsg. von: Friedrich Löffler
Y1  - 1989
N1  - Europäisches Symposion Partikelabscheidung aus Gasen <1, 1989, Nürnberg>
SP  - 441
EP  - 457
PB  - NürnbergMesse
CY  - Nürnberg
ER  -