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MHD Activity in GOL-3 During Injection of Long-Pulse Electron Beam

A. V. Sudnikov et al.

Fusion Science and Technology / Volume 63 / Number 1T / Pages 250-252

May 2013

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Magnetic activity of plasma during the injection of 2-8 MW non-relativistic electron beam of sub-millisecond duration in GOL-3 is studied.

The main parameters of fluctuations of the magnetic field are discussed. In most experiments the m = 1 azimuthal mode has the largest value, although, higher modes stay significant. Amplitude of the largest perturbations is ~1/2 of the beam radius. The phase grows monotonically, rotational velocity agrees well with the expected E×B drift.

Longitudinal velocity of the fluctuations was also measured, its value v ~ 107 cm/s is close to the ion sound speed for Te ~ 100 eV.

 
 
 
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