Cusp Radiation Source: A Challenge for Theory and Simulation Jiasheng Chen, Theodore A. Fritz, Katherine E. Whitaker, Forrest S. Mozer, and Robert B. Sheldon In cooperation with: J. F. Fennell, M. Klida, K. Kudela, V. N. Lutsenko, J. Niehof, J. S. Pickett, J. Roeder, C. T. Russell, G. L. Siscoe, W. N. Spjeldvik, and K. Trattner
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Cusp Radiation Source: A Challenge for Theory and Simulation Jiasheng Chen, Theodore A. Fritz, Katherine E. Whitaker, Forrest S. Mozer, and Robert B. Sheldon.
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Cusp Radiation Source: A Challenge for Theory and Simulation
Jiasheng Chen, Theodore A. Fritz, Katherine E. Whitaker,Forrest S. Mozer, and Robert B. Sheldon
In cooperation with:J. F. Fennell, M. Klida, K. Kudela, V. N. Lutsenko, J. Niehof, J. S. Pickett, J. Roeder, C. T. Russell,
G. L. Siscoe, W. N. Spjeldvik, and K. Trattner
Theory and simulation predict:
• Cusp is a precipitation region for particles;
• A positive IMF By would move the dayside northern cusp into post-noon;
• A negative IMF By would move the dayside northern cusp into pre-noon (e.g., Cowley et al., JGR, 96, 5557, 1991).
Cusp Diamagnetic Cavities (CDC): |B|
CDC at 9:30 MLT
(pre-noon)
with turbulence.
Cusp energetic Particle (CEP)
Cusp
CDC at 14-23 UT on 5/13/99 with a size of ~ 6 Re.
Solar wind conditions for the 5/13/99 CDC
Since By < 0,a CDC at pre-noon
was expected.
By < 0
Other CDC observations under different solar wind conditions: