Aerosol nucleation induced by a high energy particle beam

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Abstract

The effect of ions in aerosol nucleation is a subject where much remains to be discovered. That ions can enhance nucleation has been shown by theory, observations, and experiments. However, the exact mechanism still remains to be determined. One question is if the nature of the ionization affects the nucleation. This is an essential question since many experiments have been performed using radioactive sources that ionize differently than the cosmic rays which are responsible for the majority of atmospheric ionization. Here we report on an experimental study of sulphuric acid aerosol nucleation under near atmospheric conditions using a 580 MeV electron beam to ionize the volume of the reaction chamber. We find a clear and significant contribution from ion induced nucleation and consider this to be an unambiguous observation of the ion-effect on aerosol nucleation using a particle beam under conditions not far from the Earth's atmosphere. By comparison with ionization using a gamma source we further show that the nature of the ionizing particles is not important for the ion component of the nucleation.
Original languageEnglish
Publication date2010
Number of pages1
Publication statusPublished - 2010
EventAmerican Geosphysical Union, Fall Meeting -
Duration: 1 Jan 2010 → …

Conference

ConferenceAmerican Geosphysical Union, Fall Meeting
Period01/01/2010 → …

Cite this

Enghoff, M. A. B., Pedersen, J. O. P., Uggerhøj, U. I., Paling, S., & Svensmark, H. (2010). Aerosol nucleation induced by a high energy particle beam. Abstract from American Geosphysical Union, Fall Meeting, .
Enghoff, Martin Andreas Bødker ; Pedersen, Jens Olaf Pepke ; Uggerhøj, Ulrik I. ; Paling, Sean ; Svensmark, Henrik. / Aerosol nucleation induced by a high energy particle beam. Abstract from American Geosphysical Union, Fall Meeting, .1 p.
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abstract = "The effect of ions in aerosol nucleation is a subject where much remains to be discovered. That ions can enhance nucleation has been shown by theory, observations, and experiments. However, the exact mechanism still remains to be determined. One question is if the nature of the ionization affects the nucleation. This is an essential question since many experiments have been performed using radioactive sources that ionize differently than the cosmic rays which are responsible for the majority of atmospheric ionization. Here we report on an experimental study of sulphuric acid aerosol nucleation under near atmospheric conditions using a 580 MeV electron beam to ionize the volume of the reaction chamber. We find a clear and significant contribution from ion induced nucleation and consider this to be an unambiguous observation of the ion-effect on aerosol nucleation using a particle beam under conditions not far from the Earth's atmosphere. By comparison with ionization using a gamma source we further show that the nature of the ionizing particles is not important for the ion component of the nucleation.",
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Enghoff, MAB, Pedersen, JOP, Uggerhøj, UI, Paling, S & Svensmark, H 2010, 'Aerosol nucleation induced by a high energy particle beam' American Geosphysical Union, Fall Meeting, 01/01/2010, .

Aerosol nucleation induced by a high energy particle beam. / Enghoff, Martin Andreas Bødker; Pedersen, Jens Olaf Pepke; Uggerhøj, Ulrik I.; Paling, Sean; Svensmark, Henrik.

2010. Abstract from American Geosphysical Union, Fall Meeting, .

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

TY - ABST

T1 - Aerosol nucleation induced by a high energy particle beam

AU - Enghoff, Martin Andreas Bødker

AU - Pedersen, Jens Olaf Pepke

AU - Uggerhøj, Ulrik I.

AU - Paling, Sean

AU - Svensmark, Henrik

PY - 2010

Y1 - 2010

N2 - The effect of ions in aerosol nucleation is a subject where much remains to be discovered. That ions can enhance nucleation has been shown by theory, observations, and experiments. However, the exact mechanism still remains to be determined. One question is if the nature of the ionization affects the nucleation. This is an essential question since many experiments have been performed using radioactive sources that ionize differently than the cosmic rays which are responsible for the majority of atmospheric ionization. Here we report on an experimental study of sulphuric acid aerosol nucleation under near atmospheric conditions using a 580 MeV electron beam to ionize the volume of the reaction chamber. We find a clear and significant contribution from ion induced nucleation and consider this to be an unambiguous observation of the ion-effect on aerosol nucleation using a particle beam under conditions not far from the Earth's atmosphere. By comparison with ionization using a gamma source we further show that the nature of the ionizing particles is not important for the ion component of the nucleation.

AB - The effect of ions in aerosol nucleation is a subject where much remains to be discovered. That ions can enhance nucleation has been shown by theory, observations, and experiments. However, the exact mechanism still remains to be determined. One question is if the nature of the ionization affects the nucleation. This is an essential question since many experiments have been performed using radioactive sources that ionize differently than the cosmic rays which are responsible for the majority of atmospheric ionization. Here we report on an experimental study of sulphuric acid aerosol nucleation under near atmospheric conditions using a 580 MeV electron beam to ionize the volume of the reaction chamber. We find a clear and significant contribution from ion induced nucleation and consider this to be an unambiguous observation of the ion-effect on aerosol nucleation using a particle beam under conditions not far from the Earth's atmosphere. By comparison with ionization using a gamma source we further show that the nature of the ionizing particles is not important for the ion component of the nucleation.

M3 - Conference abstract for conference

ER -

Enghoff MAB, Pedersen JOP, Uggerhøj UI, Paling S, Svensmark H. Aerosol nucleation induced by a high energy particle beam. 2010. Abstract from American Geosphysical Union, Fall Meeting, .