TY - JOUR

T1 - Collision of Ionization Waves in Long Discharge Tubes

AU - Shishpanov, A.I.

AU - Ivanov, D.O.

AU - Kalinin, S.A.

N1 - Shishpanov, A. I., Ivanov, D. O., & Kalinin, S. A. (2019). Collision of ionization waves in long discharge tubes. Plasma Research Express, 1(2), 025004. https://doi.org/10.1088/2516-1067/ab1b8d

PY - 2019/5/3

Y1 - 2019/5/3

N2 - This research focuses on interaction of ionization waves (IW) generated in long discharge tubes (1 m length and 1.5 cm in diameter) filled with neon or argon under pressure about 1 Torr and, in particular, on simplest case of such interference which is collision of the opposite directed IW of positive polarity. The waves were triggered from two electrodes of the tube by simultaneous application of the same high voltage pulse and propagated toward the tube center until their collision. Space and time stability of the collisions was achieved via decreasing time delay of the initial breakdowns which trigger IW by employment of both memory effect and photo-desorption of wall surface electrons. Significant memory effect occurred for the pulse repetition rate over 100Hz. Multiple IW transition from the electrode forms specific one-electrode discharge; as a result the problem of IW collision was transformed into the observation of two opposite one-electrode discharges interaction. Patterns of IW interfering were registered via deviation of their kinematic characteristics (x-t diagrams) from ones for non-collided wave. This method shows that two ionization waves travel toward each other with decreasing speeds and subsequent degradation of the emission. An area near the tube center where IWs emission was not detected was considered as the IW suppression zone. The zone width depends on voltage amplitude, gas type and pressure.

AB - This research focuses on interaction of ionization waves (IW) generated in long discharge tubes (1 m length and 1.5 cm in diameter) filled with neon or argon under pressure about 1 Torr and, in particular, on simplest case of such interference which is collision of the opposite directed IW of positive polarity. The waves were triggered from two electrodes of the tube by simultaneous application of the same high voltage pulse and propagated toward the tube center until their collision. Space and time stability of the collisions was achieved via decreasing time delay of the initial breakdowns which trigger IW by employment of both memory effect and photo-desorption of wall surface electrons. Significant memory effect occurred for the pulse repetition rate over 100Hz. Multiple IW transition from the electrode forms specific one-electrode discharge; as a result the problem of IW collision was transformed into the observation of two opposite one-electrode discharges interaction. Patterns of IW interfering were registered via deviation of their kinematic characteristics (x-t diagrams) from ones for non-collided wave. This method shows that two ionization waves travel toward each other with decreasing speeds and subsequent degradation of the emission. An area near the tube center where IWs emission was not detected was considered as the IW suppression zone. The zone width depends on voltage amplitude, gas type and pressure.

KW - physics.plasm-ph

KW - Волна ионизации, пробой в длинной трубке, столкновение волн ионизации, одноэлектродный разряд

UR - http://www.mendeley.com/research/collision-ionization-waves-long-discharge-tubes

U2 - 10.1088/2516-1067/ab1b8d

DO - 10.1088/2516-1067/ab1b8d

M3 - Article

VL - 1

JO - Plasma Research Express

JF - Plasma Research Express

SN - 2516-1067

IS - 2

M1 - 025004

ER -