Plasma neutralization models for intense ion beam transport in plasma [electronic resource].
- Published:
- Washington, D.C. : United States. Dept. of Energy, 2003.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- 3 pages : digital, PDF file
- Additional Creators:
- Lawrence Berkeley National Laboratory
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information - Access Online:
- www.osti.gov
- Summary:
- Plasma neutralization of an intense ion pulse is of interest for many applications, including plasma lenses, heavy ion fusion, cosmic ray propagation, etc. An analytical electron fluid model has been developed based on the assumption of long charge bunches (l{sub b} >> r{sub b}). Theoretical predictions are compared with the results of calculations utilizing a particle-in-cell (PIC) code. The cold electron fluid results agree well with the PIC simulations for ion beam propagation through a background plasma. The analytical predictions for the degree of ion beam charge and current neutralization also agree well with the results of the numerical simulations. The model predicts very good charge neutralization (>99%) during quasi-steady-state propagation, provided the beam pulse duration τ{sub b} is much longer than the electron plasma period 2π/ω{sub p}, where ω{sub p} = (4πe²n{sub p}/m){sup 1/2} is the electron plasma frequency, and n{sub p} is the background plasma density. In the opposite limit, the beam pulse excites large-amplitude plasma waves. The analytical formulas derived in this paper can provide an important benchmark for numerical codes, and provide scaling relations for different beam and plasma parameters.
- Subject(s):
- Note:
- Published through SciTech Connect.
05/01/2003.
"lbnl--53351"
" hifan 1241"
Particle Accelerator Conference PAC 03, Portland, OR (US), 05/12/2003--05/16/2003.
Davidson, Ronald C.; Lee, Edward P.; Kaganovich, Igor D.; Startsev, Edward A.; O'Rourke, Sean. - Funding Information:
- AC03-76SF00098
Z46010
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