E. V. Parkevich, I. N. Tilikin, A. V. Agafonov, T. A. Shelkovenko, V. M. Romanova, A. R. Mingaleev, S. Yu. Savinov, G. A. Mesyats, S. A. Pikuz, “High-resolution X-ray projection radiography of a pin cathode in a high-current vacuum diode using X-pinch radiation”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2016, Volume 103, Issue 5,Pages <nobr>402

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High-resolution X-ray projection radiography of a pin cathode in a high-current vacuum diode using X-pinch radiation

E. V. Parkevich^ab, I. N. Tilikin^a, A. V. Agafonov^ac, T. A. Shelkovenko^a, V. M. Romanova^a, A. R. Mingaleev^a, S. Yu. Savinov^a, G. A. Mesyats^a, S. A. Pikuz^a

^a Lebedev Physical Institute, Russian Academy of Sciences, Leninskii pr. 53, Moscow, 119991, Russia
^b Moscow Institute of Physics and Technology, Institutskii per. 9, Dolgoprudnyi, Moscow region, 141700, Russia
^c National Research Nuclear University MEPhI, Kashirskoe sh. 31, Moscow, 115409, Russia

Abstract: To study processes in a high-current vacuum diode with a cathode in the form of a single pin made of a metallic wire 20–30 $\mu$m in diameter, the method of high-resolution projection X-ray radiography with an X-pinch as a source has been used. A strong inhomogeneity of the energy contribution to the wire has been revealed. The smallest energy release has been observed near the end of the pin, where the electric field strength is maximal. Hard X rays, as well as the ejection of matter from the anode, have been observed, indicating the generation of an electron beam with the parameters characteristic of explosive electron emission in the diode with this configuration. The data obtained indicate complex processes occurring in the diode. Possible scenarios of their development have been considered.

Received: 20.01.2016

DOI: 10.7868/S0370274X16050131