Search Results - "Jackel, B"

Using Mutual Information to Determine Geoeffectiveness of Solar Wind Phase Fronts With Different Front Orientations by Cameron, T. G., Jackel, B., Oliveira, D. M.

“…The geoeffectiveness of solar wind shocks depends on angle with respect to the Sun‐Earth line, with highly angled solar wind shocks being less geoeffective…”
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Optical Spectra and Emission Altitudes of Double‐Layer STEVE: A Case Study by Liang, Jun, Donovan, E., Connors, M., Gillies, D., St‐Maurice, J. P., Jackel, B., Gallardo‐Lacourt, B., Spanswick, E., Chu, X.

“…We report an event study of STEVE on 17 July 2018, with focus on the optical spectra and emission altitudes of STEVE. We find that the STEVE comprises two…”
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The THEMIS Array of Ground-based Observatories for the Study of Auroral Substorms by Mende, S. B., Harris, S. E., Frey, H. U., Angelopoulos, V., Russell, C. T., Donovan, E., Jackel, B., Greffen, M., Peticolas, L. M.

“…The NASA Time History of Events and Macroscale Interactions during Substorms (THEMIS) project is intended to investigate magnetospheric substorm phenomena,…”
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On the 630 nm red‐line pulsating aurora: Red‐line Emission Geospace Observatory observations and model simulations by Liang, Jun, Donovan, E., Jackel, B., Spanswick, E., Gillies, M.

“…In this study, we present observations of red‐line (630 nm) pulsating auroras using the camera system of Red‐line Emission Geospace Observatory (REGO), during…”
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Nitriding model for zirconium based fuel cladding in severe accident codes by Jäckel, B.S., Birchley, J.C., Lind, T., Steinbrück, M., Park, S.

“…•Model developed for reactions of nitrogen during air oxidation of Zr-cladding.•Data from separate effect tests used to develop the model.•Decisive importance…”
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Identifying the 630 nm auroral arc emission height: A comparison of the triangulation, FAC profile, and electron density methods by Megan Gillies, D., Knudsen, D., Donovan, E., Jackel, B., Gillies, R., Spanswick, E.

“…We present a comprehensive survey of 630 nm (red‐line) emission discrete auroral arcs using the newly deployed Redline Emission Geospace Observatory. In this…”
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Intensification of preexisting auroral arc at substorm expansion phase onset: Wave-like disruption during the first tens of seconds by Liang, Jun, Donovan, E. F., Liu, W. W., Jackel, B., Syrjäsuo, M., Mende, S. B., Frey, H. U., Angelopoulos, V., Connors, M.

“…With the deployment of the all‐sky imager array of the THEMIS mission, we were able to construct a preliminary database of auroral substorm expansion phase…”
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Birkeland current boundary flows by Archer, W. E., Knudsen, D. J., Burchill, J. K., Jackel, B., Donovan, E., Connors, M., Juusola, L.

“…Intense zonal ion velocity jets in the northern nightside auroral zone are measured during quiet geomagnetic conditions by the Swarm satellites around 500 km…”
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Simultaneous THEMIS in situ and auroral observations of a small substorm by Donovan, E., Liu, W., Liang, J., Spanswick, E., Voronkov, I., Connors, M., Syrjäsuo, M., Baker, G., Jackel, B., Trondsen, T., Greffen, M., Angelopoulos, V., Russell, C. T., Mende, S. B., Frey, H. U., Keiling, A., Carlson, C. W., McFadden, J. P., Glassmeier, K.-H., Auster, U., Hayashi, K., Sakaguchi, K., Shiokawa, K., Wild, J. A., Rae, I. J.

“…We present ground‐based and in situ observations from March 13, 2007. The THEMIS satellites were in the evening sector conjugate to THEMIS ground‐based…”
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Severe accident code-to-code comparison for two accident scenarios in a spent fuel pool by Coindreau, O., Jäckel, B., Rocchi, F., Alcaro, F., Angelova, D., Bandini, G., Barnak, M., Behler, M., Da Cruz, D.F., Dagan, R., Drai, P., Ederli, S., Herranz, L.E., Hollands, T., Horvath, G., Kaliatka, A., Kljenak, I., Kotsuba, O., Lind, T., López, C., Mancheva, K., Matejovic, P., Matkovič, M., Steinbrück, M., Stempniewicz, M., Thomas, R., Vileiniskis, V., Visser, D.C., Vokáč, P., Vorobyov, Y., Zhabin, O.

“…•Benchmark of 6 SA codes (14 participants) for two accident scenarios in a Spent Fuel Pool.•Differences in draining velocity induced scattering in the onset of…”
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Ground-based optical determination of the b2i boundary: A basis for an optical MT-index by Donovan, E. F., Jackel, B. J., Voronkov, I., Sotirelis, T., Creutzberg, F., Nicholson, N. A.

“…The equatorward boundary of the proton aurora corresponds to a transition from strong pitch angle scattering to bounce trapped particles. This transition has…”
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The predicted effects of selected Phebus FPT1 sump constituents on iodine volatility by Cripps, R.C., Güntay, S., Jäckel, B.

“…The analytical results of containment sump samples in the Phebus FP1Test show the presence of Cd, Sn, U, Ag, Re (destroyed thermocouples) as well as Ag at…”
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Timing and location of substorm onsets from THEMIS satellite and ground based observations by MENDE, S, ANGELOPOULOS, V, FREY, H. U, DONOVAN, E, JACKEL, B, GLASSMEIER, K.-H, MCFADDEN, J. P, LARSON, D, CARLSON, C. W

“…The unprecedented coverage of the THEMIS GBO station network coupled with high temporal and spatial resolution allowed us to determine the various stages of…”
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Auroral spectral estimation with wide-band color mosaic CCDs by Jackel, B. J, Unick, C, Syrjäsuo, M. T, Partamies, N, Wild, J. A, Woodfield, E. E, McWhirter, I, Kendall, E, Spanswick, E

“…Optical aurora can be structured over a wide range of spatial and temporal scales with spectral features that depend on the energy of precipitating particles…”
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Determination of substorm onset timing and location using the THEMIS ground based observatories by Mende, S. B., Angelopoulos, V., Frey, H. U., Harris, S., Donovan, E., Jackel, B., Syrjaesuo, M., Russell, C. T., Mann, I.

“…The NASA THEMIS mission is studying substorms by timing the substorm signatures at multiple satellite locations in the magnetosphere and in the aurora using 20…”
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Width and structure of mesoscale optical auroral arcs by Knudsen, D. J., Donovan, E. F., Cogger, L. L., Jackel, B., Shaw, W. D.

“…Arc widths were calculated for 3126 stable auroral arcs observed by an all‐sky camera located in Gillam, Manitoba. The camera is filtered to accept 5577‐Å…”
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Global observations of substorm injection region evolution: 27 August 2001 by SPANSWICK, E, DONOVAN, E, LIU, W, LIANG, J, BLAKE, J. B, REEVES, G, FRIEDEL, R, JACKEL, B, CULLY, C, WEATHERWAX, A

“…We present riometer and in situ observations of a substorm electron injection on 27 August 2001. The event is seen at more than 20 separate locations…”
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Observation of isolated high-speed auroral streamers and their interpretation as optical signatures of Alfvén waves generated by bursty bulk flows by Liu, W. W., Liang, J., Donovan, E. F., Trondsen, T., Baker, G., Sofko, G., Jackel, B., Wang, C.-P., Mende, S., Frey, H. U., Angelopoulos, V.

“…The THEMIS All‐Sky Imager at Fort Smith, Canada observed a sudden appearance and subsequent evolution of auroral streamers on April 15, 2006. The event took…”
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Large-scale vortex dynamics in the evening and midnight auroral zone: Observations and simulations by Voronkov, I., Donovan, E. F., Jackel, B. J., Samson, J. C.

“…We use Canadian Auroral Network for the OPEN Program Unified Study All‐Sky Imager (ASI) and Meridional Scanning Photometer (MSP) data as the basis for a study…”
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THEMIS Ground Based Observatory System Design by Harris, S. E., Mende, S. B., Angelopoulos, V., Rachelson, W., Donovan, E., Jackel, B., Greffen, M., Russell, C. T., Pierce, D. R., Dearborn, D. J., Rowe, K., Connors, M.

“…The comprehensive THEMIS approach to solving the substorm problem calls for monitoring the nightside auroral oval with low-cost, robust white-light imagers and…”
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