molybdenum needle
molybdenum needle
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Molybdenum Needle in Experiments

molybdenum needle in experiments

The experiments were performed in a demountable vacuum chamber under continuous pumping, providing pressure ~10-4 Pa. The block diagram of the experimental setup is shown in the picture on the right. Interelectrode gap was fixed at h=4 mm.

The discharge was ignited on the cathode surface at a distance ≈8 mm from the edge using molybdenum needle. The discharge was powered from a special generator providing rectangular current pulse with adjustable current up to 50 kA and duration up to 10 ms. Prior to measurements, the cathode surface was cleaned with a set of high-current pulses.

Molybdenum needle in an experiment is to provide an auxiliary function, but it is essential, so that the experiment can be performed.

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