Observation of Simultaneous Axial and Transverse Classical Heat Transport in a Magnetized Plasma

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Abstract
The transport of heat deposited by a small low-voltage electron beam in a strongly magnetized plasma is studied for a time interval in excess of two thousand ion-gyro periods. Electron temperatures are observed to evolve along and across the magnetic field at the classically predicted rates up to times approaching one thousand gyro periods. At later times the onset of low-frequency fluctuations (below one-tenth the ion gyrofrequency) coincides with departures from classical behavior.