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Kinetic ballooning/interchange instability in a bent plasma sheet. / Panov, E. V.; Nakamura, R.; Baumjohann, W.; Kubyshkina, M. G.; Artemyev, A. V.; Sergeev, V. A.; Petrukovich, A. A.; Angelopoulos, V.; Glassmeier, K. -H.; McFadden, J. P.; Larson, D.

In: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol. 117, No. A6, 06228, 28.06.2012.

Research output: Contribution to journal › Article › peer-review

Harvard

Panov, EV, Nakamura, R, Baumjohann, W, Kubyshkina, MG, Artemyev, AV, Sergeev, VA, Petrukovich, AA, Angelopoulos, V, Glassmeier, K-H, McFadden, JP & Larson, D 2012, 'Kinetic ballooning/interchange instability in a bent plasma sheet', JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, vol. 117, no. A6, 06228. https://doi.org/10.1029/2011JA017496, https://doi.org/10.1029/2011JA017496

APA

Panov, E. V., Nakamura, R., Baumjohann, W., Kubyshkina, M. G., Artemyev, A. V., Sergeev, V. A., Petrukovich, A. A., Angelopoulos, V., Glassmeier, K. -H., McFadden, J. P., & Larson, D. (2012). Kinetic ballooning/interchange instability in a bent plasma sheet. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 117(A6), [06228]. https://doi.org/10.1029/2011JA017496, https://doi.org/10.1029/2011JA017496

Vancouver

Panov EV, Nakamura R, Baumjohann W, Kubyshkina MG, Artemyev AV, Sergeev VA et al. Kinetic ballooning/interchange instability in a bent plasma sheet. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS. 2012 Jun 28;117(A6). 06228. https://doi.org/10.1029/2011JA017496, https://doi.org/10.1029/2011JA017496

Author

Panov, E. V. ; Nakamura, R. ; Baumjohann, W. ; Kubyshkina, M. G. ; Artemyev, A. V. ; Sergeev, V. A. ; Petrukovich, A. A. ; Angelopoulos, V. ; Glassmeier, K. -H. ; McFadden, J. P. ; Larson, D. / Kinetic ballooning/interchange instability in a bent plasma sheet. In: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS. 2012 ; Vol. 117, No. A6.

BibTeX

@article{edf4ac38564248478f4abe5455f6c502,
title = "Kinetic ballooning/interchange instability in a bent plasma sheet",
abstract = "We use Time History of Events and Macroscale Interactions during Substorms (THEMIS) and GOES observations to investigate the plasma sheet evolution on 28 February 2008 between 6:50 and 7:50 UT, when there developed strong magnetic field oscillations with periods of 100 s. Using multispacecraft analysis of the plasma sheet observations and an empirical plasma sheet model, we determine both the large-scale evolution of the plasma sheet and the properties of the oscillations. We found that the oscillations exhibited signatures of kinetic ballooning/interchange instability fingers that developed in a bent current sheet. The interchange oscillations had a sausage structure, propagated duskward at a velocity of about 100 km/s, and were associated with fast radial electron flows. We suggest that the observed negative gradient of the Z(GSM) magnetic field component (partial derivative B-Z/partial derivative X) was a free energy source for the kinetic ballooning/interchange instability. Tens of minutes later a fast elongation of ballooning/interchange fingers was detected between 6 and 16 R-E downtail with the length-to-width ratio exceeding 20. The finger elongation ended with signatures of reconnection in an embedded current sheet near the bending point. These observations suggest a complex interplay between the midtail and near-Earth plasma sheet dynamics, involving localized fluctuations in both cross-tail and radial directions before current sheet reconnection.",
keywords = "THIN CURRENT SHEETS, DRIFT-KINK INSTABILITY, RAPID FLUX TRANSPORT, BURSTY BULK FLOWS, CLUSTER OBSERVATIONS, EARTHS MAGNETOTAIL, MAGNETIC RECONNECTION, CURRENT DISRUPTION, SUBSTORM ONSET, NEUTRAL SHEET",
author = "Panov, {E. V.} and R. Nakamura and W. Baumjohann and Kubyshkina, {M. G.} and Artemyev, {A. V.} and Sergeev, {V. A.} and Petrukovich, {A. A.} and V. Angelopoulos and Glassmeier, {K. -H.} and McFadden, {J. P.} and D. Larson",
year = "2012",
month = jun,
day = "28",
doi = "10.1029/2011JA017496",
language = "Английский",
volume = "117",
journal = "Journal of Geophysical Research: Biogeosciences",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "A6",

}

RIS

TY - JOUR

T1 - Kinetic ballooning/interchange instability in a bent plasma sheet

AU - Panov, E. V.

AU - Nakamura, R.

AU - Baumjohann, W.

AU - Kubyshkina, M. G.

AU - Artemyev, A. V.

AU - Sergeev, V. A.

AU - Petrukovich, A. A.

AU - Angelopoulos, V.

AU - Glassmeier, K. -H.

AU - McFadden, J. P.

AU - Larson, D.

PY - 2012/6/28

Y1 - 2012/6/28

N2 - We use Time History of Events and Macroscale Interactions during Substorms (THEMIS) and GOES observations to investigate the plasma sheet evolution on 28 February 2008 between 6:50 and 7:50 UT, when there developed strong magnetic field oscillations with periods of 100 s. Using multispacecraft analysis of the plasma sheet observations and an empirical plasma sheet model, we determine both the large-scale evolution of the plasma sheet and the properties of the oscillations. We found that the oscillations exhibited signatures of kinetic ballooning/interchange instability fingers that developed in a bent current sheet. The interchange oscillations had a sausage structure, propagated duskward at a velocity of about 100 km/s, and were associated with fast radial electron flows. We suggest that the observed negative gradient of the Z(GSM) magnetic field component (partial derivative B-Z/partial derivative X) was a free energy source for the kinetic ballooning/interchange instability. Tens of minutes later a fast elongation of ballooning/interchange fingers was detected between 6 and 16 R-E downtail with the length-to-width ratio exceeding 20. The finger elongation ended with signatures of reconnection in an embedded current sheet near the bending point. These observations suggest a complex interplay between the midtail and near-Earth plasma sheet dynamics, involving localized fluctuations in both cross-tail and radial directions before current sheet reconnection.

AB - We use Time History of Events and Macroscale Interactions during Substorms (THEMIS) and GOES observations to investigate the plasma sheet evolution on 28 February 2008 between 6:50 and 7:50 UT, when there developed strong magnetic field oscillations with periods of 100 s. Using multispacecraft analysis of the plasma sheet observations and an empirical plasma sheet model, we determine both the large-scale evolution of the plasma sheet and the properties of the oscillations. We found that the oscillations exhibited signatures of kinetic ballooning/interchange instability fingers that developed in a bent current sheet. The interchange oscillations had a sausage structure, propagated duskward at a velocity of about 100 km/s, and were associated with fast radial electron flows. We suggest that the observed negative gradient of the Z(GSM) magnetic field component (partial derivative B-Z/partial derivative X) was a free energy source for the kinetic ballooning/interchange instability. Tens of minutes later a fast elongation of ballooning/interchange fingers was detected between 6 and 16 R-E downtail with the length-to-width ratio exceeding 20. The finger elongation ended with signatures of reconnection in an embedded current sheet near the bending point. These observations suggest a complex interplay between the midtail and near-Earth plasma sheet dynamics, involving localized fluctuations in both cross-tail and radial directions before current sheet reconnection.

KW - THIN CURRENT SHEETS

KW - DRIFT-KINK INSTABILITY

KW - RAPID FLUX TRANSPORT

KW - BURSTY BULK FLOWS

KW - CLUSTER OBSERVATIONS

KW - EARTHS MAGNETOTAIL

KW - MAGNETIC RECONNECTION

KW - CURRENT DISRUPTION

KW - SUBSTORM ONSET

KW - NEUTRAL SHEET

U2 - 10.1029/2011JA017496

DO - 10.1029/2011JA017496

M3 - статья

VL - 117

JO - Journal of Geophysical Research: Biogeosciences

JF - Journal of Geophysical Research: Biogeosciences

SN - 0148-0227

IS - A6

M1 - 06228

ER -

ID: 5330908