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Title: Collective Focusing of Intense Ion Beam Pulses for High-energy Density Physics Applications

Abstract

The collective focusing concept in which a weak magnetic lens provides strong focusing of an intense ion beam pulse carrying a neutralizing electron background is investigated by making use of advanced particle-in-cell simulations and reduced analytical models. The original analysis by Robertson Phys. Rev. Lett. 48, 149 (1982) is extended to the parameter regimes of particular importance for several high-energy density physics applications. The present paper investigates (1) the effects of non-neutral collective focusing in a moderately strong magnetic field; (2) the diamagnetic effects leading to suppression of the applied magnetic field due to the presence of the beam pulse; and (3) the influence of a finite-radius conducting wall surrounding the beam cross-section on beam neutralization. In addition, it is demonstrated that the use of the collective focusing lens can significantly simplify the technical realization of the final focusing of ion beam pulses in the Neutralized Drift Compression Experiment-I (NDCX-I) , and the conceptual designs of possible experiments on NDCX-I are investigated by making use of advanced numerical simulations. 2011 American Institute of Physics

Authors:
; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1013056
Report Number(s):
PPPL-4615
TRN: US1102953
DOE Contract Number:  
DE-ACO2-09CH11466
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAM NEUTRALIZATION; COMPRESSION; ELECTRONS; FOCUSING; ION BEAMS; MAGNETIC FIELDS; PHYSICS; Bean Plasma Interactions Plasma Focus, Magnetic Field Effects

Citation Formats

Dorf, Mikhail A., Kaganovich, Igor D., Startsev, Edward A., and Davidson, Ronald C. Collective Focusing of Intense Ion Beam Pulses for High-energy Density Physics Applications. United States: N. p., 2011. Web. doi:10.2172/1013056.
Dorf, Mikhail A., Kaganovich, Igor D., Startsev, Edward A., & Davidson, Ronald C. Collective Focusing of Intense Ion Beam Pulses for High-energy Density Physics Applications. United States. https://doi.org/10.2172/1013056
Dorf, Mikhail A., Kaganovich, Igor D., Startsev, Edward A., and Davidson, Ronald C. 2011. "Collective Focusing of Intense Ion Beam Pulses for High-energy Density Physics Applications". United States. https://doi.org/10.2172/1013056. https://www.osti.gov/servlets/purl/1013056.
@article{osti_1013056,
title = {Collective Focusing of Intense Ion Beam Pulses for High-energy Density Physics Applications},
author = {Dorf, Mikhail A. and Kaganovich, Igor D. and Startsev, Edward A. and Davidson, Ronald C.},
abstractNote = {The collective focusing concept in which a weak magnetic lens provides strong focusing of an intense ion beam pulse carrying a neutralizing electron background is investigated by making use of advanced particle-in-cell simulations and reduced analytical models. The original analysis by Robertson Phys. Rev. Lett. 48, 149 (1982) is extended to the parameter regimes of particular importance for several high-energy density physics applications. The present paper investigates (1) the effects of non-neutral collective focusing in a moderately strong magnetic field; (2) the diamagnetic effects leading to suppression of the applied magnetic field due to the presence of the beam pulse; and (3) the influence of a finite-radius conducting wall surrounding the beam cross-section on beam neutralization. In addition, it is demonstrated that the use of the collective focusing lens can significantly simplify the technical realization of the final focusing of ion beam pulses in the Neutralized Drift Compression Experiment-I (NDCX-I) , and the conceptual designs of possible experiments on NDCX-I are investigated by making use of advanced numerical simulations. 2011 American Institute of Physics},
doi = {10.2172/1013056},
url = {https://www.osti.gov/biblio/1013056}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Apr 27 00:00:00 EDT 2011},
month = {Wed Apr 27 00:00:00 EDT 2011}
}