摘要: On the vessel walls of high temperature plasma experiments traces cathode spots from electrical arcs have been observed. They originate short metal discharges which can be ignited at due to Langmuir sheath potential in front and thus hydrogen acts as anode. The may also caused by potentials are created gradients plasma, motion or during disruptive phases. material eroded contributes impurity introduction into plasma. Further arcing is a critical issue intensity ion sources RF transmitters antennas for heating.
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