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damping of waves

Marsch talk on Landau damping and ion beams - UNH Experimental ...

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Temperature ratio versus beta<br />

T ⊥ /T ⎜⎜<br />

T ┴ / T ll = 1+ 2β -0.5<br />

Blue line empirical fit:<br />

T ┴ / T ll = 1.16 β -0.55<br />

The core temperature anisotropy<br />

is regulated by quasilinear<br />

diffusion <strong>of</strong> protons in resonance<br />

with thermal cyclotron <strong>waves</strong>.<br />

Marsch, Ao, Tu, JGR, 109, 2004<br />

• Speed V > 600 km/s<br />

• 36297 proton spectra<br />

0.3 AU

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