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Observation of synchrotron radiation from runaway discharges
It has been observed on TEXTOR that in low density discharges the electrons gain enough energy to emit relativistic synchrotron radiation in the 3--6 {mu}m IR-range, and this radiation is due to electrons with energies up to 30 MeV. The momentum in perpendicular direction amounts to about 1/10 of the longitudinal one. The total number of runaways is of the order of 10{sup 16} electrons, and they carry a current of about 20% of the total plasma current. 3 refs., 1 fig.