Theory for Formation of a Low-Pressure, Current-Free Double Layer
- 26 July 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 97 (4), 045003
- https://doi.org/10.1103/physrevlett.97.045003
Abstract
A diffusion-controlled theory is developed for the formation of a low-pressure, current-free double layer just inside an upstream insulating source chamber connected to a larger diameter, downstream chamber. The double layer is described using four groups of charged particles: thermal ions, monoenergetic accelerated ions flowing downstream, accelerated electrons flowing upstream, and thermal electrons. The condition of particle balance upstream is found to determine the double layer potential. The double layer disappears at very low pressures due to loss of ionization balance upstream and due to energy relaxation processes for ionizing electrons at higher pressures, in good agreement with experiments.Keywords
This publication has 17 references indexed in Scilit:
- The Current-Free Electric Double Layer in a Coronal Magnetic FunnelThe Astrophysical Journal, 2006
- Electric Field in a Double Layer and the Imparted MomentumPhysical Review Letters, 2006
- Experimental Evidence of a Double Layer in a Large Volume Helicon ReactorPhysical Review Letters, 2005
- Observations of Ion-Beam Formation in a Current-Free Double LayerPhysical Review Letters, 2005
- Principles of Plasma Discharges and Materials ProcessingPublished by Wiley ,2005
- Time development of a current-free double-layerPhysics of Plasmas, 2004
- Ion acceleration in plasmas emerging from a helicon-heated magnetic-mirror devicePhysics of Plasmas, 2003
- Current-free double-layer formation in a high-density helicon dischargeApplied Physics Letters, 2003
- The physics of double layers and their role in astrophysicsPhysics Reports, 1989
- Laboratory double layers with no external fieldsPhysics Letters A, 1981