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This article is cited in 9 scientific papers (total in 9 papers)
Plasma
Parametric study of two stable forms of discharge burning in a Hall-effect thruster
I. A. Khmelevskoiab, D. A. Tomilina a Federal State Unitary Enterprise "Keldysh Research Center", Moscow
b Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow Region
Abstract:
In this paper, we experimentally studied the behavior of the integral operation parameters of a Hall-effect thruster (thrust and specific thrust impulse) in two stable discharge glow modes significantly different from each other in anodic efficiency. The studies were conducted using a laboratory model of a Hall-effect thruster with an extended layer with an average discharge channel diameter of 77 mm in the discharge voltage range of 500–900 V and in the gas-flow rate range from 2 to 5 mg/s. The most striking distinguishing features of the observed glow regimes are the plasma jet shape and the discharge current value at almost identical input parameters (gas flow, discharge voltage, and magnetic field). In the entire studied range of input parameters when changing from the optimal mode (in terms of efficiency) to suboptimal, the main integral characteristics of the engine are shown to undergo a stepwise change: the discharge current increases by 10–30% with a simultaneous relative drop in thrust by 5–15% and in efficiency by 20–40%. A detailed study of the anodic efficiency structure showed that, at abrupt rebuilding, the efficiency of using the electron current (the ratio of the ion current to the discharge current) changes, i.e., the electron conductivity in the engine discharge channel.
Keywords:
electrically powered spacecraft propulsion, hall thruster, efficiency, discharge stability, discharge modes.
Received: 22.01.2019 Revised: 22.01.2019 Accepted: 25.03.2019
Citation:
I. A. Khmelevskoi, D. A. Tomilin, “Parametric study of two stable forms of discharge burning in a Hall-effect thruster”, Zhurnal Tekhnicheskoi Fiziki, 89:9 (2019), 1360–1366; Tech. Phys., 64:9 (2019), 1283–1289
Linking options:
https://www.mathnet.ru/eng/jtf5513 https://www.mathnet.ru/eng/jtf/v89/i9/p1360
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