The bright loop-top kernels in Yohkoh X-ray flares
Jakimiec, J., M. Tomczak, R. Falewicz, K. J. H. Phillips, and A. Fludra, The bright loop-top kernels in Yohkoh X-ray flares, A&A, 334, 1112-1122 (1998) (ADS)
(click on the image for a larger version)
Suppose the coronal field lines in a loop became really tangled
up at the loop top?
So tangled that a loss cone for fast electrons was not even defined?
Could one then not trap particles efficiently and thereby explain the
peculiar loop-top structures seen in SXT images? This idea of
turbulent trapping occurs frequently; see for example the
Emslie-Vlahos cartoon.
The unique cartoon here illustrates the interface between laminar field lines
in a flare loop, intersecting a turbulent region at its top. Of course
the field line loses its meaning in the turbulent region, and so the
external connectivity would fluctuate in time at the microscopic level.
Suppose the coronal field lines in a loop became really tangled up at the loop top? So tangled that a loss cone for fast electrons was not even defined? Could one then not trap particles efficiently and thereby explain the peculiar loop-top structures seen in SXT images? This idea of turbulent trapping occurs frequently; see for example the Emslie-Vlahos cartoon.
The unique cartoon here illustrates the interface between laminar field lines in a flare loop, intersecting a turbulent region at its top. Of course the field line loses its meaning in the turbulent region, and so the external connectivity would fluctuate in time at the microscopic level.