Main field of study: 011200 Physics
Area of specialization: Physical Optics and Lasers
Department of Optics
Scientific adviser: prof. Ionikh Yu.Z, Dr. Meshchanov A.V.
Reviewer: prof. Ivanov V.A.

An experimental study of the breakdown in argon and argon-nitrogen mixtures in a long discharge tube at low pressures
A.N. Korshunov

Thesis is devoted to study of the breakdown in argon and argon-nitrogen mixture in a long discharge tube at low pressures. The breakdown was initiated by paired positive voltage pulses. A normal and anomalous “memory effect” was studied under various conditions. Optical detection of the prebreakdown ionization wave (IW) has been performed, and the IW velocity has been measured. The modeling calculation of plasma after its termination in positive column and in an anode region has been carried out. Some conclusions are drawn about the mechanisms that lead to the "memory effect".

The list of the publications:
1.	A.N. Korshunov. Study of the “memory effect” at breakdown in argon and argon-nitrogen mixture, International Student Conference “Science and Progress”, St. Petersburg – Peterhof, September, 30 - October, 4, 2013.
2.	А.В. Мещанов, А.Н. Коршунов, Ю.З. Ионих, А.И. Шишпанов, Н.А. Дятко. «Эффект памяти» при пробое в аргоне низкого давления в длинной разрядной трубке. ФНТП-2014, Казань, 20−23 мая.
3.	A.V. Meshchanov, A.N. Korshunov, Yu. Z. Ionikh, A.I. Shishpanov, N.A. Dyatko. Memory effect in low-prressure argon breakdown in a long discharge tube. ESCAMPIG XXII, Greifswald, Germany, July 15-19, 2014.
4.	N.A. Dyatko, Yu. Z. Ionikh, A.V. Meshchanov, A.P. Napartovich, A.N. Korshunov. DC glow discharge characteristics in Ar: N2 mixtures at intermediate pressure: the dependence on N2 percentage. ESCAMPIG XXII, Greifswald, Germany, July 15-19, 2014.
5.	А.В. Мещанов, А.Н. Коршунов, Ю.З. Ионих, Д.М. Сушенцев, Н.А. Дятко. «Эффект памяти» разрядного промежутка в смеси аргон-азот. XLII Международная Звенигородская конференция по физике плазмы, 9-13 февраля, 2015.
6.	A.V. Meshchanov, A.N. Korshunov, Yu. Z. Ionikh, N.A. Dyatko. Anomalous memory effect during breakdown of low-pressure argon in a long discharge tube // Plasma Physics Reports, Vol. 41, No. 8, 2015. (in print)