Investigation on plasma structure evolution and discharge characteristics of a single-stage planar-pulsed-inductive accelerator under ambient fill condition
The physical process of a single-stage planar-pulsed-inductive accelerator is investigated. Measurements include the waveforms of circuit current, capacitor voltage, plasma radiation intensity, and temporal plasma structure photos captured by a high-speed camera. Experiments are conducted under static ambient fill condition using argon as propellant. Varied values of capacitor voltage and gas pressure are compared. Further discussions quantify the EM interaction between circuit and plasma, as well as their energy deposition and current sheet acceleration. Based on the results of experiments, physical mechanisms of the initial ionization phase and the following acceleration phase are analyzed theoretically.
Xiao-Kang Li(李小康), Bi-Xuan Che(车碧轩), Mou-Sen Cheng(程谋森), Da-Wei Guo(郭大伟), Mo-Ge Wang(王墨戈), and Yun-Tian Yang(杨云天) Investigation on plasma structure evolution and discharge characteristics of a single-stage planar-pulsed-inductive accelerator under ambient fill condition 2020 Chin. Phys. B 29 115201
Fig. 1.
Schematic diagram of experiment setups.
Fig. 2.
Configuration of drive-coil.
Fig. 3.
Arrange of capacitors.
Fig. 4.
Circuit schematic diagram of pulse-forming network (PFN).
Drive-coil inductance
Total capacitance
Parasitic resistance
Parasitic inductance
LC/nH
C/μF
R0/mΩ
L0/nH
378
8
13
123
Table 1.
Circuit parameters of pulse-forming network.
Fig. 5.
Long exposure photograph of the discharge process.
Fig. 6.
Representative frames of high speed photographing.
Fig. 7.
Capacitor voltage V.
Fig. 8.
Circuit current IC.
Fig. 9.
Plasma radiation intensity UR.
Fig. 10.
Lumped elementary circuit model of a pulsed-inductive accelerator.
Fig. 11.
Comparisons of derived parameters: (a) exhausting speed vt, (b) Lovberg ratio L*, (c) energy deposition ratio ε.
Fig. 12.
Comparison of initial gas ionization mode: (a) a compact current sheet leads to snowplow ionization mode; (b) a loosen current sheet leads to diffusive ionization mode.
Fig. 13.
Comparisons of current sheet acceleration state: (a) current sheet still resorts near drive-coil when the circuit current has already inversed; (b) current sheet has already decoupled with drive-coil before the circuit current peaks; (c) current sheet just decouples with drive-coil when circuit current inverses.
[1]
Bathgate S N, Bilek M M M, Mckenzie D R 2017 Plasma Sci. Technol.19 083001 DOI: 10.1088/2058-6272/aa71fe
[2]
Robert H F, Ioannis G M 2005 41st AIAA/ASME/SAE/ASEE Joint Conference and Exhibit July 10–13, 2005 Tucson, Arizona, USA AIAA 2005–3892
Dailey C L, Lovberg R H 1993 NASA Contractor Report Lewis Research Centre, NASA 1-19291
[5]
Russell D, Poylio J H, Goldstein W, Bernard J, Lovberg R H, Dailey C L 2004 Space 2004 Conference and Exhibit September 28–30, 2004 San Diego, California, USA AIAA 2004-6054
[6]
Choueiri E Y, Polzin K A 2006 J. Propul. Power22 611 DOI: 10.2514/1.16399
[7]
Martin A K, Dominguez A, Eskridge R H, Polzin K A, Riley D P 2015 34th International Electric Propulsion Conference July 4–10, 2015 Hyogo-Kobe, Japan IEPC 2015-50
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