Electron-beam enhancement of ion charge state fractions in the metal-vapor vacuum-arc ion source

Бугаев, А. С.; Gushenets, V. I.; Yushkov, G. Yu.; Окс, Е. М.; Kulevoy, T. V.; Hershcovitch, A.; Johnson, B. M.

doi:10.1063/1.1392969

Cited by 35 publications

(6 citation statements)

References 10 publications

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“…This research results can support not only for the design of a pulsed electric propulsion system, but also the improvement of ion implantation technology [28,29] and the extraction of highly ionized ion beams [30,31].…”

Section: Introductionsupporting

confidence: 53%

Performance study on a metal ion plasma thruster using a trumpet-shaped insulated anode with double micropores

Tian¹,

Liu²,

Gao³

et al. 2020

Plasma Phys. Control. Fusion

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A metal ion plasma thruster (MIPT) structure using a trumpet-shaped insulated anode with double micropores (TsIADM), which consists of a frustum-cone-shaped cathode, insulating sleeve, trumpet-shaped anode and anodic insulating layer with double micropores, is proposed. The differences in discharge characteristics and propulsion performance of the TsIADM-MIPT and two other structures, a trumpet-shaped semi-insulated anode MIPT and a conventional trumpet-shaped exposed anode (TsEA) MIPT, are compared and analyzed. Furthermore, the influence that the position of the double micropores has on the MIPT performance is discussed. The results show that the thrust and thrust-to-power ratio are all largest when the double micropores are set at the top end of the inner insulating layer of the trumpet-shaped anode (TsIADM(T)-MIPT). When compared with the TsEA-MIPT, the TsIADM(T)-MIPT demonstrates thrust and thrust-to-power ratios that are improved by 11.6 and 9.5 times respectively. The discharge parameters show that the number of charged particles flowing into the anode in a single shot decreases obviously when adopting the TsIADM(T). The discharge phenomena indicate that compared with the TsEA-MIPT, the luminescence intensity and ejection performance of the plasma plume using the TsIADM(T)-MIPT increases significantly.When the capacitor energy of the system is 5 J, Langmuir probe data show that the plasma density and plasma propagation speed are increased by 16.5 and 4.6 times respectively. These results are believed to be fundamental to the physical mechanisms behind the increased thrust and thruster-to-power ratio of the TsIADM(T)-MIPT.

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Section: Introductionsupporting

confidence: 53%

Performance study on a metal ion plasma thruster using a trumpet-shaped insulated anode with double micropores

Tian¹,

Liu²,

Gao³

et al. 2020

Plasma Phys. Control. Fusion

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“…Further charge states enhancements for ion beam formation have been demonstrated for dedicated ion sources using magnetic compression and electron-beam ionization of the vacuum arc plasma in zMevva [126][127][128] and e-Mevva configurations [127,[129][130][131]). Alternatively, microwave-based electron cyclotron resonance (ECR) ionization can be used to shift the average charge state, e.g.…”

Section: Additional Ionization Of Cathodic Vacuum Arc Plasmamentioning

confidence: 99%

The evolution of ion charge states in cathodic vacuum arc plasmas: a review

Anders¹

2012

Plasma Sources Sci. Technol.

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ACKNOWLEDGMENTMany of the here-collected results are based on ideas and contributions by close friends and colleagues. Running the risk of offending those not mentioned, I gratefully acknowledge the input over the years from just a few: B. Jüttner, E. Hantzsche, P. Siemroth, T. Schülke, I. Brown, E. Oks and G. Yushkov. This work was supported by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. DISCLAIMERThis document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by its trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof, or The Regents of the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof or The Regents of the University of California. 2The evolution of ion charge states in cathodic vacuum arc plasmas: a review André AndersLawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 53, Berkeley, California 94720, USA Email: aanders@lbl.gov AbstractCathodic vacuum arc plasmas are known to contain multiply charged ions. 20 years after "Pressure Ionization: its role in metal vapour vacuum arc plasmas and ion sources" appeared in vol. 1 of Plasma Sources Science and Technology, it is a great opportunity to re-visit the issue of pressure ionization, a non-ideal plasma effect, and put it in perspective to the many other factors that influence observable charge state distributions, such as the role of the cathode material, the path in the density-temperature phase diagram, the "noise" in vacuum arc plasma as described by a fractal model approach, the effects of external magnetic fields and charge exchange collisions with neutrals. A much more complex image of the vacuum arc plasma emerges putting decades of experimentation and modeling in perspective.

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“…A better extraction geometry will be evaluated. As an alternative, quasi-continuous or pulsed electron sources reaching densities up to 10 11 cm −3 are already available [16,17].…”

Section: Jinst 7 P01008mentioning

confidence: 99%

Thomson backscattering diagnostic set-up for the study of nanosecond electron bunches in high space-charge regime

et al. 2012

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A Thomson backscattering diagnostic apparatus was set up in the ELTRAP (ELectron TRAP) device for the measurement of density as well as longitudinal energy and energy spread of nanosecond electron bunches traveling through a longitudinal magnetic field in a dynamical regime where space-charge effects play a significant role. We discuss the main features of the apparatus as well as the challenging technical issues of the backscattering experiment. In particular, we detail the technical solutions and the characterization of both bunch and laser injection in the vacuum chamber, photon detection, space and time coincidence of electron and laser pulses. Then we summarize the results with an estimate of the minimum sensitivity of the set-up.

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Electron-beam enhancement of ion charge state fractions in the metal-vapor vacuum-arc ion source

Cited by 35 publications

References 10 publications

Performance study on a metal ion plasma thruster using a trumpet-shaped insulated anode with double micropores

Performance study on a metal ion plasma thruster using a trumpet-shaped insulated anode with double micropores

The evolution of ion charge states in cathodic vacuum arc plasmas: a review

Thomson backscattering diagnostic set-up for the study of nanosecond electron bunches in high space-charge regime

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