@misc{hermann_an_optical_2016, 
author={Hermann, M.,Weigelt, A.,Assmann, D.,Pfeifer, S.,Mueller, T.,Conrath, T.,Voigtlaender, J.,Heintzenberg, J.,Wiedensohler, A.,Martinsson, B.G.,Deshler, T.,Brenninkmeijer, C.A.M.,Zahn, A.},
title={An optical particle size spectrometer for aircraft-borne measurements in IAGOS-CARIBIC},
year={2016},
howpublished = {journal article},
doi = {https://doi.org/10.5194/amt-9-2179-2016},
abstract = {The particle number size distribution is an important parameter to characterize the atmospheric aerosol and its influence on the Earth's climate. Here we describe a new optical particle size spectrometer (OPSS) for measurements of the accumulation mode particle number size distribution in the tropopause region on board a passenger aircraft (IAGOS-CARIBIC observatory: In-service Aircraft for a Global Observing System – Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrument Container). A modified KS93 particle sensor from RION Co., Ltd., together with a new airflow system and a dedicated data acquisition system, is the key component of the CARIBIC OPSS. The instrument records individual particle pulse signal curves in the particle size range 130–1110 nm diameter (for a particle refractive index of 1.47-i0.006) together with a time stamp and thus allows the post-flight choice of the time resolution and the size distribution bin width. The CARIBIC OPSS has a 50 % particle detection diameter of 152 nm and a maximum asymptotic counting efficiency of 98 %. The instrument's measurement performance shows no pressure dependency and no particle coincidence for free tropospheric conditions. The size response function of the CARIBIC OPSS was obtained by a polystyrene latex calibration in combination with model calculations. Particle number size distributions measured with the new OPSS in the lowermost stratosphere agreed within a factor of 2 in concentration with balloon-borne measurements over western North America. Since June 2010 the CARIBIC OPSS is deployed once per month in the IAGOS-CARIBIC observatory.},
note = {Online available at: \url{https://doi.org/10.5194/amt-9-2179-2016} (DOI). Hermann, M.; Weigelt, A.; Assmann, D.; Pfeifer, S.; Mueller, T.; Conrath, T.; Voigtlaender, J.; Heintzenberg, J.; Wiedensohler, A.; Martinsson, B.; Deshler, T.; Brenninkmeijer, C.; Zahn, A.: An optical particle size spectrometer for aircraft-borne measurements in IAGOS-CARIBIC. Atmospheric Measurement Techniques. 2016. vol. 9, no. 5, 2179-2194. DOI: 10.5194/amt-9-2179-2016}}