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Christoph Helsper (48)
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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.
(1985)
Christoph Helsper
;
H. Bartz
;
H. J. Fißan
;
Y. (u.a.) Kousaka
On the Influence of the Vapour Substance on the Behaviour of an Expansion Type Condensation Nucleus Counter
(1985)
Christoph Helsper
;
R. Nießner
Investigation on the Bipolar Charge Distribution at Various Gas Conditions / Wiedensohler, A.; Lütkemeier, E.; Feldpausch, M. ; Helsper, C.
(1986)
Christoph Helsper
;
A. Wiedensohler
;
E. Lütkemeier
;
M. Feldpausch
Intercomparison of Eleven Condensation Nucleus Counters / Dreiling, V. ; Haller, P. ; Helsper, C.; Kaminski, U. ; Plomp, A. ; Raes, F. ; Roth, C. ; Schier, J. ; Schürmann, G.
(1986)
Christoph Helsper
;
V. Dreiling
;
P. Haller
;
U. Kaminski
Determination and Neutralization of the Charge Produced by the Dispersion of Powders
(1987)
Christoph Helsper
;
W. Mölter
Representative Dilution of Aerosols by a Factor of 10,000
(1990)
Christoph Helsper
;
W. Mölter
;
P. Haller
Kondensationskernzähler und ihre Anwendung in der Reinraumtechnik
(1986)
Christoph Helsper
Determination of the Bipolar Charge Equilibrium in Pure Gases / Wiedensohler, A. ; Weise, W. ; Helsper, C. ; Lütkemeier, E.
(1986)
Christoph Helsper
;
A. Wiedensohler
;
W. Weise
;
E. Lütkemeier
Charge Distribution by Unipolar Charging of Small Aerosol Particles / Lütkemeier, E. ; Helsper, C. ; Wiedensohler, A.
(1986)
Christoph Helsper
;
E. Lütkemeier
;
A. Wiedensohler
Measurement Techniques For Ultrafine Particles
(1986)
Christoph Helsper
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