TY - JOUR

T1 - Evaluation of the Electric Field Strength in a Pre-Breakdown Ionization Wave in a Long Discharge Tube from the Emission Spectrum

AU - Dyatko, N. A.

AU - Ionikh, Yu Z.

AU - Kalinin, S. A.

AU - Mityureva, A. A.

N1 - Dyatko, N.A., Ionikh, Y.Z., Kalinin, S.A. et al. Evaluation of the Electric Field Strength in a Pre-Breakdown Ionization Wave in a Long Discharge Tube from the Emission Spectrum. Plasma Phys. Rep. 46, 200–216 (2020). https://doi.org/10.1134/S1063780X20020026

PY - 2020/2

Y1 - 2020/2

N2 - Abstract: The paper presents the results of studying the characteristics of a slow ionization wave (IW) arising at the initial stage of breakdown in a long discharge tube under reduced pressure. The discharge tube is a Philips TUV-30W mercury lamp with an electrode spacing of 80 cm and an inner diameter of 23 mm. The tube is filled with argon at a pressure of 2–4 Torr (nominal data) and mercury vapor. One of the electrodes is grounded, and, to the second one, positive or negative voltage pulses with an amplitude of 2 kV, a leading edge duration of ≈0.5 μs, and a repetition frequency of 1 Hz are applied. The IW velocity and the time dependence of the intensities of the Ar, Ar+, and Hg lines in the IW at different distances from the high-voltage electrode are measured. It is shown that the velocity of a positive IW (3 × 107–5 × 107 cm/s) is higher than the velocity of a negative IW (1 × 107–1.8 × 107 cm/s). The magnitude of the electric field in the front of an IW is evaluated from the comparison of the measured and calculated intensity ratios of the Ar, Ar+, and Hg lines. It is shown that, in a positive IW, the magnitude of the reduced electric field (260–450 Td) is noticeably larger than in a negative one (120–165 Td).

AB - Abstract: The paper presents the results of studying the characteristics of a slow ionization wave (IW) arising at the initial stage of breakdown in a long discharge tube under reduced pressure. The discharge tube is a Philips TUV-30W mercury lamp with an electrode spacing of 80 cm and an inner diameter of 23 mm. The tube is filled with argon at a pressure of 2–4 Torr (nominal data) and mercury vapor. One of the electrodes is grounded, and, to the second one, positive or negative voltage pulses with an amplitude of 2 kV, a leading edge duration of ≈0.5 μs, and a repetition frequency of 1 Hz are applied. The IW velocity and the time dependence of the intensities of the Ar, Ar+, and Hg lines in the IW at different distances from the high-voltage electrode are measured. It is shown that the velocity of a positive IW (3 × 107–5 × 107 cm/s) is higher than the velocity of a negative IW (1 × 107–1.8 × 107 cm/s). The magnitude of the electric field in the front of an IW is evaluated from the comparison of the measured and calculated intensity ratios of the Ar, Ar+, and Hg lines. It is shown that, in a positive IW, the magnitude of the reduced electric field (260–450 Td) is noticeably larger than in a negative one (120–165 Td).

KW - breakdown

KW - emission spectrum

KW - ionization wave

KW - long tube

KW - POPULATION

KW - IMPACT EXCITATION

KW - CROSS-SECTIONS

KW - INTENSITY RATIO

KW - ARGON

KW - NITROGEN

KW - COEFFICIENTS

KW - IGNITION

KW - PROPAGATION

KW - BREAKDOWN

UR - http://www.scopus.com/inward/record.url?scp=85081000623&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/d8c5aafa-b8df-35cc-90eb-f4e2baed8e5b/

U2 - 10.1134/S1063780X20020026

DO - 10.1134/S1063780X20020026

M3 - Article

AN - SCOPUS:85081000623

VL - 46

SP - 200

EP - 216

JO - Plasma Physics Reports

JF - Plasma Physics Reports

SN - 1063-780X

IS - 2

ER -