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Table 1

Approximate lengthscales.

Parameter Flaring corona Chromosphere

electron gyro-radius (re) 0.26   cm 0.18   cm
ion gyro-radius (ri) 11   cm 7.9   cm
electron skin depth (δe) 5.3   cm 3.8   cm
ion skin depth (δi) 2.3   m 1.6   m
classical mean free path (λmfp) 30   km 1.5   m

Notes. Approximate values of fundamental plasma parameters, calculated using normalisation values. In the flaring corona, these were density n ~ 1 × 1016   m-3, temperature T ~ 2 × 106   K and magnetic field strength B ~ 118   G, while in the chromosphere, values of n ~ 2 × 1016   m-3, T ~ 2 × 104   K and B ~ 17   G were used.

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