First Test Results of the 1 to 15 kW Coaxial HEMP 30250 Thruster

Koch, Norbert; Harmann, Hans-Peter; Kornfeld, Guenter

doi:10.2514/6.2005-4224

Cited by 12 publications

(9 citation statements)

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“…Fig. 13 The calibration of the RPA is done by means of Faraday cup measurements. (a) RPA measurements and (b) corresponding Faraday cup measurements.…”

Section: Calibration Of the Rpamentioning

confidence: 99%

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An in-flight plasma diagnostic package for spacecraft with electric propulsion

et al. 2021

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The plasma diagnostics presented in this article target the plasma surrounding a spacecraft that is created by the electric thruster and its surface modifying effects. The diagnostic package includes a retarding potential analyzer, a plane Langmuir probe, and an erosion sensor. The paper describes the instrument as well as suitable test environments for mimicking the effects expected in space and shows test results. The system is to fly for the first time on the Heinrich Hertz satellite, which is scheduled to be launched in 2023. The spacecraft will be equipped with a pair of Highly Efficient Multistage Plasma Thrusters (HEMPT) and a pair of Hall thrusters for redundancy.

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“…Fig. 13 The calibration of the RPA is done by means of Faraday cup measurements. (a) RPA measurements and (b) corresponding Faraday cup measurements.…”

Section: Calibration Of the Rpamentioning

confidence: 99%

“…The mission also offers universities, research institutes and industry a platform for conducting numerous scientific and technical experiments. Heinrich Hertz will be equipped with a pair of HEMPT 3050 thrusters from Thales Deutschland GmbH [13] and a pair of SPT 100 Hall thrusters from OKB Fakel [14] for redundancy (see Fig. 2).…”

Section: Introductionmentioning

confidence: 99%

An in-flight plasma diagnostic package for spacecraft with electric propulsion

et al. 2021

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“…104 We do not provide a detailed description of all individual thruster types here and refer the reader-to beside the already mentioned-to other relevant literature. 41,[105][106][107][108][109][110][111][112] All three main thruster types have in common that electrical energy is converted into kinetic energy of the exhausted particles to generate or increase thrust. This energy conversion process differs in efficiency for the three types and is also very different in terms of the complexity of the technical implementation.…”

Section: Electromagnetic Thrustersmentioning

confidence: 99%

Ion thrusters for electric propulsion: Scientific issues developing a niche technology into a game changer

Holste

Dietz

Scharmann

et al. 2020

Review of Scientific Instruments

136

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The transition from OLD SPACE to NEW SPACE along with increasing commercialization has a major impact on space flight, in general, and on electric propulsion (EP) by ion thrusters, in particular. Ion thrusters are nowadays used as primary propulsion systems in space. This article describes how these changes related to NEW SPACE affect various aspects that are important for the development of EP systems. Starting with a historical overview of the development of space flight and of the technology of EP systems, a number of important missions with EP and the underlying technologies are presented. The focus of our discussion is the technology of the radio frequency ion thruster as a prominent member of the gridded ion engine family. Based on this discussion, we give an overview of important research topics such as the search for alternative propellants, the development of reliable neutralizer concepts based on novel insert materials, as well as promising neutralizer-free propulsion concepts. In addition, aspects of thruster modeling and requirements for test facilities are discussed. Furthermore, we address aspects of space electronics with regard to the development of highly efficient electronic components as well as aspects of electromagnetic compatibility and radiation hardness. This article concludes with a presentation of the interaction of EP systems with the spacecraft.

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“…It is inspired by the multi-cusped field in a travelingwave tube. Kornfeld et al used this special magnetic field in the design of a new concept electric thruster, and it was firstly named as the high efficiency multi-stage plasma thruster (HEMPT) [1][2][3][4]. The thruster employs several permanent magnet rings to form a unique multi-cusped field [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Magnet stage optimization of 5 kW multi-cusped field thruster

Hu¹,

Yu²,

Shen³

2020

Plasma Sci. Technol.

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The multi-cusped field thruster is a unique electric thruster device, which has many advantages such as long lifetime, large-range thrust throttling ability, high thrust density, and low mass. The thruster employs several alternating polarity permanent magnets to create a periodic magnetic field with several cusps. Previous studies have indicated that the basic ionization and acceleration processes are directly related to the electron motion behavior, which mainly depends on the magnetic field characteristics. The magnet number and magnet stage length are two key magnetic field parameters that have important effects on the thruster performances. In this paper, both the magnet number and magnet stage length parameters are studied for the optimization of a 5 kW multi-cusped field thruster. The results indicate that the three-stage thruster has a better electron confinement than the two-stage thruster. It has lower ion energy loss at the wall, and shows a higher ionization rate. Therefore, the three-stage magnetic field is a superior magnetic field configuration. Besides, the three-stage magnetic field simulation results indicate that an optimal accelerating electric field distribution and ionization region distribution could be obtained when the magnet length ratio is 78:25:20.

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First Test Results of the 1 to 15 kW Coaxial HEMP 30250 Thruster

Cited by 12 publications

References 0 publications

An in-flight plasma diagnostic package for spacecraft with electric propulsion

An in-flight plasma diagnostic package for spacecraft with electric propulsion

Ion thrusters for electric propulsion: Scientific issues developing a niche technology into a game changer

Magnet stage optimization of 5 kW multi-cusped field thruster

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