Time‐Resolved Measurements of Plasma Properties Using Electrostatic Probes in the Cross‐Field Discharge of a Hall Effect Thruster

Dannenmayer, Käthe; Kudrna, P.; Tichý, M.; Mazouffre, S.

doi:10.1002/ctpp.201310011

Cited by 2 publications

(2 citation statements)

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“…26,28 Further downstream, the oscillations do not have sufficient amplitude to influence the EEPF as it was proved by the previous measurements. 18,22,48 Experiments confirm the idea that the EEPF near the thruster exit plane is composed of two electron groups. The first group is extracted from the external hollow cathode by the electric field having a component along the magnetic field near the cathode region.…”

Section: Discussionmentioning

confidence: 56%

Electron energy distribution function in a low-power Hall thruster discharge and near-field plume

et al. 2018

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Electron temperature and plasma density, as well as the electron energy distribution function (EEDF), have been obtained inside and outside the dielectric channel of a 200 W permanent magnet Hall thruster. Measurements were carried out by means of a cylindrical Langmuir probe mounted onto a compact fast moving translation stage. The 3D particle-in cell numerical simulations complement experiments. The model accounts for the crossed electric and magnetic field configuration in a weakly collisional regime where only electrons are magnetized. Since only the electron dynamics is of interest in this study, an artificial mass of ions corresponding to m i ¼ 30 000m e was used to ensure ions could be assumed at rest. The simulation domain is located at the thruster exit plane and does not include the cathode. The measured EEDF evidences a high-energy electron population that is superimposed onto the low energy bulk population outside the channel. Inside the channel, the EEDF is close to Maxwellian. Both the experimental and numerical EEDF depart from an equilibrium distribution at the channel exit plane, a region of high magnetic field. We therefore conclude that the fast electron group found in the experiment corresponds to the electrons emitted by the external cathode that reach the thruster discharge without experiencing collision events.

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Section: Discussionmentioning

confidence: 56%

Electron energy distribution function in a low-power Hall thruster discharge and near-field plume

et al. 2018

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“…Electron property measurement in Hall thrusters has so far been extensively performed with Langmuir probes, including in [25][26][27][28], to name only a few. Optical emission spectroscopy has also been used as an alternative method to estimate electron temperature in thrusters in works including [29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Incoherent Thomson scattering measurements of electron properties in a conventional and magnetically-shielded Hall thruster

Vincent

Tsikata

Mazouffre

2020

Plasma Sources Sci. Technol.

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Reliable measurements of electron properties are key for the validation of simulations of Hall thrusters and similar plasma sources. In this paper, a recently-developed incoherent Thomson scattering diagnostic is successfully applied to electron property measurement in a low-power Hall thruster discharge. Investigations of electron properties along radial and azimuthal directions in both conventional and magnetically-shielded architectures are performed. The high diagnostic sensitivity gives access to electron property measurements in a plasma environment with densities as low as 10 16 m −3 . Electron temperatures reaching several tens of eV and drift velocities on the order of 10 6 m s −1 are measured in the exit plane region. The impact of the magnetic field (intensity and direction) and discharge voltage are investigated.

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Time‐Resolved Measurements of Plasma Properties Using Electrostatic Probes in the Cross‐Field Discharge of a Hall Effect Thruster

Cited by 2 publications

References 18 publications

Electron energy distribution function in a low-power Hall thruster discharge and near-field plume

Electron energy distribution function in a low-power Hall thruster discharge and near-field plume

Incoherent Thomson scattering measurements of electron properties in a conventional and magnetically-shielded Hall thruster

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