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Thrust Stand Measurements of a Conical Pulsed Inductive Plasma Thruster
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Author and Affiliation:
Hallock, Ashley K.(Yetispace, Inc., Huntsville, AL, United States);
Polzin, Kurt A.(NASA Marshall Space Flight Center, Huntsville, AL, United States);
Emsellem, Gregory D.(The Elwing Company, Wilmington, DE, United States)
Abstract: Pulsed inductive plasma thrusters [1-3] are spacecraft propulsion devices in which electrical energy is capacitively stored and then discharged through an inductive coil. The thruster is electrodeless, with a time-varying current in the coil interacting with a plasma covering the face of the coil to induce a plasma current. Propellant is accelerated and expelled at a high exhaust velocity (O(10-100 km/s)) by the Lorentz body force arising from the interaction of the magnetic field and the induced plasma current. While this class of thruster mitigates the life-limiting issues associated with electrode erosion, pulsed inductive plasma thrusters can su er from both high pulse energy requirements imposed by the voltage demands of inductive propellant ionization, and low propellant utilization efficiencies. The Microwave Assisted Discharge Inductive Plasma Accelerator (MAD-IPA)[4], shown in Fig. 1 is a pulsed inductive plasma thruster that is able to operate at lower pulse energies by partially ionizing propellant with an electron cyclotron resonance (ECR) discharge inside a conical inductive coil whose geometry serves to potentially increase propellant and plasma plume containment relative to at coil geometries. The ECR plasma is created with the use of permanent mag- nets arranged to produce a thin resonance region along the inner surface of the coil, restricting plasma formation and, in turn, current sheet formation to areas of high magnetic coupling to the driving coil.
Publication Date: Jul 30, 2012
Document ID:
20120015654
(Acquired Nov 14, 2012)
Subject Category: SPACECRAFT PROPULSION AND POWER
Report/Patent Number: M11-1322
Document Type: Conference Paper
Meeting Information: 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit; 30 Jul. 2012 - 1 Aug. 2012; Atlanta, GA; United States
Meeting Sponsor: American Inst. of Aeronautics and Astronautics; Washington, DC, United States
American Society of Mechanical Engineers; Washington, DC, United States
Society of Automotive Engineers, Inc.; Warrendale, PA, United States
American Society for Electrical Engineers; United States
Financial Sponsor: NASA Marshall Space Flight Center; Huntsville, AL, United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Description: 2p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: CONICAL BODIES; PULSED PLASMA THRUSTERS; PULSED INDUCTIVE THRUSTERS; THRUST MEASUREMENT; PLASMA ACCELERATORS; SPACECRAFT PROPULSION; INDUCTORS; LORENTZ FORCE; ELECTRON CYCLOTRON RESONANCE; ELECTRIC POWER
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