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In-situ detection of noctilucent cloud particles by the Colorado Dust Detectors onboard the PHOCUS sounding rocket.

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Title: In-situ detection of noctilucent cloud particles by the Colorado Dust Detectors onboard the PHOCUS sounding rocket.
Authors: Sternovsky, Z.1,2 Zoltan.Sternovsky@colorado.edu, Robertson, S.3, Dickson, S.1, Gumbel, J.4, Hedin, J.4, Strelnikov, B.5, Asmus, H.5, Havnes, O.6
Source: Journal of Atmospheric & Solar-Terrestrial Physics. Oct2014, Vol. 118 Issue Part B, p145-150. 6p.
Subjects: Noctilucent clouds, Particle size distribution, PHOCUS (Information retrieval system), Atmospheric aerosols, Permanent magnets, Data analysis
Abstract: The Particles, Hydrogen and Oxygen Chemistry in the Upper Summer mesosphere (PHOCUS) sounding rocket campaign is a payload that carried multiple in-situ instruments for the detection of charged icy particles of noctilucent clouds (NLCs). The PHOCUS payload was launched on July 21st, 2011 and carried 18 scientific instruments. Three of these instruments were dedicated to the detection of the charged aerosol particles. All three instruments detected a narrow ice layer at around 81.5km altitude. The Colorado Dust Detectors (CDDs) collected the net charge from the impact of aerosol particles on two graphite surfaces mounted flush with the payload skin. A combination of a small bias potential and permanent magnets were used to suppress the collection of plasma particles. The efficiency of the magnetic shielding improves with increasing altitude where there are fewer scattering collisions with neutrals. The data analysis shows that the net collected current can be decomposed into contributions from photoelectron emission, plasma electrons and ions, and the aerosol particles. The results show that the current corresponding to the collection of aerosol particles is positive, which is due to secondary charging effects. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Atmospheric & Solar-Terrestrial Physics is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 97254417
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: In-situ detection of noctilucent cloud particles by the Colorado Dust Detectors onboard the PHOCUS sounding rocket.
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  Data: <searchLink fieldCode="AR" term="%22Sternovsky%2C+Z%2E%22">Sternovsky, Z.</searchLink><relatesTo>1,2</relatesTo><i> Zoltan.Sternovsky@colorado.edu</i><br /><searchLink fieldCode="AR" term="%22Robertson%2C+S%2E%22">Robertson, S.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Dickson%2C+S%2E%22">Dickson, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Gumbel%2C+J%2E%22">Gumbel, J.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Hedin%2C+J%2E%22">Hedin, J.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Strelnikov%2C+B%2E%22">Strelnikov, B.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Asmus%2C+H%2E%22">Asmus, H.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Havnes%2C+O%2E%22">Havnes, O.</searchLink><relatesTo>6</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Atmospheric+%26+Solar-Terrestrial+Physics%22">Journal of Atmospheric & Solar-Terrestrial Physics</searchLink>. Oct2014, Vol. 118 Issue Part B, p145-150. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Noctilucent+clouds%22">Noctilucent clouds</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+size+distribution%22">Particle size distribution</searchLink><br /><searchLink fieldCode="DE" term="%22PHOCUS+%28Information+retrieval+system%29%22">PHOCUS (Information retrieval system)</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+aerosols%22">Atmospheric aerosols</searchLink><br /><searchLink fieldCode="DE" term="%22Permanent+magnets%22">Permanent magnets</searchLink><br /><searchLink fieldCode="DE" term="%22Data+analysis%22">Data analysis</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The Particles, Hydrogen and Oxygen Chemistry in the Upper Summer mesosphere (PHOCUS) sounding rocket campaign is a payload that carried multiple in-situ instruments for the detection of charged icy particles of noctilucent clouds (NLCs). The PHOCUS payload was launched on July 21st, 2011 and carried 18 scientific instruments. Three of these instruments were dedicated to the detection of the charged aerosol particles. All three instruments detected a narrow ice layer at around 81.5km altitude. The Colorado Dust Detectors (CDDs) collected the net charge from the impact of aerosol particles on two graphite surfaces mounted flush with the payload skin. A combination of a small bias potential and permanent magnets were used to suppress the collection of plasma particles. The efficiency of the magnetic shielding improves with increasing altitude where there are fewer scattering collisions with neutrals. The data analysis shows that the net collected current can be decomposed into contributions from photoelectron emission, plasma electrons and ions, and the aerosol particles. The results show that the current corresponding to the collection of aerosol particles is positive, which is due to secondary charging effects. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Atmospheric & Solar-Terrestrial Physics is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.jastp.2014.01.018
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        Text: English
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        PageCount: 6
        StartPage: 145
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      – SubjectFull: Noctilucent clouds
        Type: general
      – SubjectFull: Particle size distribution
        Type: general
      – SubjectFull: PHOCUS (Information retrieval system)
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      – SubjectFull: Atmospheric aerosols
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      – SubjectFull: Permanent magnets
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      – SubjectFull: Data analysis
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      – TitleFull: In-situ detection of noctilucent cloud particles by the Colorado Dust Detectors onboard the PHOCUS sounding rocket.
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              Text: Oct2014
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