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Current-free double-layer formation in a high-density helicon discharge
Open accessAbstract
A strong, current-free, electric double-layer with eΦ/kTe∼3 and a thickness of less than 50 debye lengths has been experimentally observed in an expanding, high-density helicon sustained rf (13.56-MHz) discharge. The rapid potential decrease is associated with the “neck” of the vacuum vessel, where the glass source tube joins the aluminum diffusion chamber, and is only observed when the argon gas pressure is less than about 0.5 mTorr. The upstream electron temperature Te appears 25% greater than the downstream Te, and there is a density hole on the downstream edge. This experiment differs from others in that the potentials are self-consistently generated by the plasma itself, and there is no current flowing through an external circuit. The plasma electrons are heated by the rf fields in the source, provide the power to maintain the double-layer, and hence accelerate ions created in the source out into the diffusion chamber.
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Cited by
Numerical aspects of particle-in-cell simulations for plasma-motion modeling of electric thrusters
Gallo, G., Isoldi, A., Del Gatto, D., Savino, R., Capozzoli, A., Curcio, C., & Liseno, A. (2021) · Aerospace · doi:10.3390/aerospace8050138 · Cited by 8
Metadata
- Authors
- Charles, C., & Boswell, R.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2003-03-03
- Volume
- 82
- Issue
- 9
- Pages
- 1356-1358
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W1967522618
- Cited by
- 307
- References
- 0
- FWCI
- 13.41
- Type
- journal article
- Language
- en
- Open access
- bronze
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
