Search: onr:"swepub:oai:DiVA.org:kth-238924" >
Enhanced Escape of ...
-
Graham, Daniel B.Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
(author)
Enhanced Escape of Spacecraft Photoelectrons Caused by Langmuir and Upper Hybrid Waves
- Article/chapterEnglish2018
Publisher, publication year, extent ...
-
AMER GEOPHYSICAL UNION,2018
-
printrdacarrier
Numbers
-
LIBRIS-ID:oai:DiVA.org:kth-238924
-
https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-238924URI
-
https://doi.org/10.1029/2018JA025874DOI
-
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-369520URI
Supplementary language notes
-
Language:English
-
Summary in:English &language:-1_t
Part of subdatabase
Classification
-
Subject category:ref swepub-contenttype
-
Subject category:art swepub-publicationtype
Notes
-
QC 20181114
-
The spacecraft potential is often used to infer rapid changes in the thermal plasma density. The variations in spacecraft potential associated with large-amplitude Langmuir and upper hybrid waves are investigated with the Magnetospheric Multiscale (MMS) mission. When large-amplitude Langmuir and upper hybrid waves are observed, the spacecraft potential increases. The changes in spacecraft potential are shown to be due to enhanced photoelectron escape from the spacecraft when the wave electric fields reach large amplitude. The fluctuations in spacecraft potential follow the envelope function of the Langmuir and upper hybrid waves. Comparison with the high-resolution electron moments shows that the changes in spacecraft potential associated with the waves are not due to density perturbations. Indeed, using the spacecraft potential as a density probe leads to unphysically large density fluctuations. In addition, the changes in spacecraft potential are shown to increase as density decreases: larger spacecraft potential changes are observed in the magnetosphere, than in the magnetosheath and solar wind. These results show that external electric fields can lead to unphysical results when the spacecraft potential is used as a density probe. The results suggest that fluctuations in the spacecraft potential alone cannot be used to determine whether nonlinear processes associated with Langmuir and upper hybrid waves, such as the ponderomotive force and three-wave decay, are occurring.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Vaivads, AndrisUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)anvai517
(author)
-
Khotyaintsev, Yu, VSwedish Inst Space Phys, Uppsala, Sweden.
(author)
-
Eriksson, AndersUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)andeerik
(author)
-
André, MatsUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)maand125
(author)
-
Malaspina, D. M.Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA.
(author)
-
Lindqvist, Per-ArneKTH,Rymd- och plasmafysik,KTH Royal Inst Technol, Sch Elect Engn, Space & Plasma Phys, Stockholm, Sweden(Swepub:kth)u1yukyk9
(author)
-
Gershman, D. J.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.;Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
(author)
-
Plaschke, F.Austrian Acad Sci, Space Res Inst, Graz, Austria.
(author)
-
Khotyaintsev, Yuri V.Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)ykh28990
(author)
-
Uppsala universitetInstitutet för rymdfysik, Uppsalaavdelningen
(creator_code:org_t)
Related titles
-
In:Journal of Geophysical Research - Space Physics: AMER GEOPHYSICAL UNION123:9, s. 7534-75532169-93802169-9402
Internet link
Find in a library
To the university's database
- By the author/editor
-
Graham, Daniel B ...
-
Vaivads, Andris
-
Khotyaintsev, Yu ...
-
Eriksson, Anders
-
André, Mats
-
Malaspina, D. M.
-
show more...
-
Lindqvist, Per-A ...
-
Gershman, D. J.
-
Plaschke, F.
-
Khotyaintsev, Yu ...
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Fusion Plasma an ...
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
- Articles in the publication
-
Journal of Geoph ...
- By the university
-
Royal Institute of Technology
-
Uppsala University