Enhanced Charging and Mobilization of Photoemitting Dust Particles in a Low‐Density Plasma
Abstract We present the first observations of dust charging and mobilization in a combined vacuum ultraviolet (VUV) and plasma environment. It is experimentally demonstrated that exposing photoemitting dust particles to a low‐density plasma enhanced the charge on the particles, accompanied by a sign...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-01-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2024GL113715 |
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| author | Josef L. Richmond José H. Pagán Muñoz Xu Wang Mihály Horányi Joshua R. Machacek Christine Charles Roderick W. Boswell |
| author_facet | Josef L. Richmond José H. Pagán Muñoz Xu Wang Mihály Horányi Joshua R. Machacek Christine Charles Roderick W. Boswell |
| author_sort | Josef L. Richmond |
| collection | DOAJ |
| description | Abstract We present the first observations of dust charging and mobilization in a combined vacuum ultraviolet (VUV) and plasma environment. It is experimentally demonstrated that exposing photoemitting dust particles to a low‐density plasma enhanced the charge on the particles, accompanied by a significant increase in dust mobilization compared to VUV or plasma exposure alone. Measurements of the dust charge support a proposed ‘charge pumping’ mechanism, in which ambient electrons are collected by photoemitting dust surfaces, causing more photoelectrons to be pumped onto surrounding dust particles, increasing repulsive forces and leading to enhanced mobilization. |
| format | Article |
| id | doaj-art-09b6b27d55df4557b2e2b53f7164e9c0 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-09b6b27d55df4557b2e2b53f7164e9c02025-01-20T13:05:57ZengWileyGeophysical Research Letters0094-82761944-80072025-01-01521n/an/a10.1029/2024GL113715Enhanced Charging and Mobilization of Photoemitting Dust Particles in a Low‐Density PlasmaJosef L. Richmond0José H. Pagán Muñoz1Xu Wang2Mihály Horányi3Joshua R. Machacek4Christine Charles5Roderick W. Boswell6Space Plasma Power and Propulsion Laboratory (SP3) Australian National University Canberra ACT AustraliaLaboratory for Atmospheric and Space Physics (LASP) University of Colorado Boulder CO USALaboratory for Atmospheric and Space Physics (LASP) University of Colorado Boulder CO USALaboratory for Atmospheric and Space Physics (LASP) University of Colorado Boulder CO USASpace Plasma Power and Propulsion Laboratory (SP3) Australian National University Canberra ACT AustraliaSpace Plasma Power and Propulsion Laboratory (SP3) Australian National University Canberra ACT AustraliaSpace Plasma Power and Propulsion Laboratory (SP3) Australian National University Canberra ACT AustraliaAbstract We present the first observations of dust charging and mobilization in a combined vacuum ultraviolet (VUV) and plasma environment. It is experimentally demonstrated that exposing photoemitting dust particles to a low‐density plasma enhanced the charge on the particles, accompanied by a significant increase in dust mobilization compared to VUV or plasma exposure alone. Measurements of the dust charge support a proposed ‘charge pumping’ mechanism, in which ambient electrons are collected by photoemitting dust surfaces, causing more photoelectrons to be pumped onto surrounding dust particles, increasing repulsive forces and leading to enhanced mobilization.https://doi.org/10.1029/2024GL113715 |
| spellingShingle | Josef L. Richmond José H. Pagán Muñoz Xu Wang Mihály Horányi Joshua R. Machacek Christine Charles Roderick W. Boswell Enhanced Charging and Mobilization of Photoemitting Dust Particles in a Low‐Density Plasma Geophysical Research Letters |
| title | Enhanced Charging and Mobilization of Photoemitting Dust Particles in a Low‐Density Plasma |
| title_full | Enhanced Charging and Mobilization of Photoemitting Dust Particles in a Low‐Density Plasma |
| title_fullStr | Enhanced Charging and Mobilization of Photoemitting Dust Particles in a Low‐Density Plasma |
| title_full_unstemmed | Enhanced Charging and Mobilization of Photoemitting Dust Particles in a Low‐Density Plasma |
| title_short | Enhanced Charging and Mobilization of Photoemitting Dust Particles in a Low‐Density Plasma |
| title_sort | enhanced charging and mobilization of photoemitting dust particles in a low density plasma |
| url | https://doi.org/10.1029/2024GL113715 |
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