Characterization of the ECN high-flow turbulent cloud chamber

Khlystov, A.; Kos, G.P.A.; Brink, H.M. ten; Berner, A.; Kruisz, C.

doi:10.1016/0021-8502(95)97000-5

Cited by 4 publications

(11 citation statements)

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“…The number counting efficiency of the probe was checked by comparing the droplet number with the number of activated aerosol particles found from the aerosol sizer measurements. The numbers did not differ for more than 10% (Khlystov et al, 1996).…”

Section: Aerosol/droplet Monitoring and Samplin9mentioning

confidence: 87%

“…The cloud chamber has proven to be capable of maintaining stable LWC, droplet spectra and supersaturation over extended periods of time (Khlystov et al,, 1996). It was found that particles larger than a certain threshold size were activated.…”

Section: Cloud Chambermentioning

confidence: 98%

“…Sodium sulphate is a result of the reaction between anthropogenic sulphuric acid and natural sea salt (NaCI) (ten Brink et al, 1981 i. The previous study (Khlystov et al, 1996) showed that the high deliquescence point of this compound {97% RH) does not inhibit cloud activation. In fact, the activation properties of the sodium sulphate were very similar to those of the (more soluble) ammonium sulphate.…”

Section: Cloud Chambermentioning

confidence: 99%

“…The cloud chamber and its characterization have been described in detail elsewhere (Khlystov et al, 1996) and only a summary of the characteristics will be given here. The central part of the chamber is a 30m 3 aluminium vessel (Fig.l).…”

Section: Cloud Chambermentioning

confidence: 99%

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Activation properties of ambient aerosol in The Netherlands

Khlystov

Kos

Brink

et al. 1996

Journal of Aerosol Science

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Abstrac~A cloud chamber has been used to study the cloud activation of ambient aerosol in The Netherlands. The large dimensions and throughput of the chamber allowed unperturbed collection of aerosol and droplets with cascade impactors and on-line measurements with cloud monitors (FSSP) inside the facility. The study provided maxima for the number of man-made aerosol acting as cloud nuclei in marine clouds in The Netherlands. Emphasis was given to the investigation of cloud formation in marine air, since sensitivity studies had shown that such clouds are most effectively influenced by the (extra) anthropogenic aerosol particles. For this reason the supersaturations in the study were low (on average 0.12%), similar to those in actual marine stratus.The effect of the anthropogenic aerosols on cloud formation was determined by comparing the number of droplets formed in "clean" arctic marine air to the number of droplets formed in "polluted" marine air (air which had travelled over the U.K.). Air masses with the total aerosol number concentration of the order of 100 cm-3 were considered as "clean" marine air. Air masses with higher aerosol concentrations were divided into "moderately" and "heavily" polluted with total aerosol concentrations of the order of 1000 and 10,000 cm-3, respectively.In the clean marine air all potential cloud nuclei (particles larger than the threshold size of the smallest reference particles that were activated at a given supersaturation) were activated and the number of cloud droplets formed was on average 45 cm-3. In the moderately polluted air 72 % of potential cloud nuclei were activated and the average droplet number was 190 cm-3. The difference in the actual cloud droplet number and the number of potential cloud nuclei could be explained by the presence of water-insoluble particles which do not activate. In the heavily polluted air the average droplet concentration was around 320 cm-3 which is, on average, 24% of the number of potential cloud nuclei. Copyright ~ 1996 Elsevier Science Ltd Key word index: Cloud activation, indirect aerosol effect.

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Section: Aerosol/droplet Monitoring and Samplin9mentioning

confidence: 87%

Section: Cloud Chambermentioning

confidence: 98%

Section: Cloud Chambermentioning

confidence: 99%

Section: Cloud Chambermentioning

confidence: 99%

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Activation properties of ambient aerosol in The Netherlands

Khlystov

Kos

Brink

et al. 1996

Journal of Aerosol Science

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“…Seeding the air with ammonium sulfate and sodium sulfate causes the water droplets to form around the molecules giving the cloud different physical and chemical properties than a pure water seed. 22 These fog generation and testing facilities provide unique capabilities relevant to their primary scientific utilization. However, the available capabilities of these chambers do not overlap and leave capabilities to be desired.…”

Section: Introductionmentioning

confidence: 99%

Image quality, meteorological optical range, and fog particulate number evaluation using the Sandia National Laboratories fog chamber

et al. 2017

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Abstract. The evaluation of optical system performance in fog conditions typically requires field testing. This can be challenging due to the unpredictable nature of fog generation and the temporal and spatial nonuniformity of the phenomenon itself. We describe the Sandia National Laboratories fog chamber, a new test facility that enables the repeatable generation of fog within a 55 m × 3 m × 3 m (L × W × H) environment, and demonstrate the fog chamber through a series of optical tests. These tests are performed to evaluate system image quality, determine meteorological optical range (MOR), and measure the number of particles in the atmosphere. Relationships between typical optical quality metrics, MOR values, and total number of fog particles are described using the data obtained from the fog chamber and repeated over a series of three tests. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Complex Plasma Afterglow

Couëdel

Mezeghrane

Samarian

et al. 2009

Contrib. Plasma Phys.

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In complex plasmas, dust particles are charged through their interactions with the electrons and the ions of the surrounding plasma. In laboratory discharges, when the discharge is turned off, the charged species of the plasma diffuse away and recombine into neutral species. When dust particles are present inside the plasma, the diffusion of charged species is affected and the plasma decay time can be strongly shorten. Moreover, the dust particles loose their electric charge during the afterglow period. However, dust particles do keep residual charges in the late afterglow and the value of these charges strongly depends on the ambipolar‐to‐free diffusion transition (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Characterization of the ECN high-flow turbulent cloud chamber

Cited by 4 publications

References 0 publications

Activation properties of ambient aerosol in The Netherlands

Activation properties of ambient aerosol in The Netherlands

Image quality, meteorological optical range, and fog particulate number evaluation using the Sandia National Laboratories fog chamber

Complex Plasma Afterglow

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