Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-19T03:23:52.069Z Has data issue: false hasContentIssue false
  • English
  • Français

Propagation of intense plasma and ion beams across B-field in vacuum and magnetized plasma

Published online by Cambridge University Press:  07 June 2005

M. ANDERSON ,
E. GARATE ,
N. ROSTOKER ,
Y. SONG ,
A. VAN DRIE  and
VITALY BYSTRITSKII
M. ANDERSON
Affiliation:
Department of Physics and Astronomy, University of California, Irvine
E. GARATE
Affiliation:
Department of Physics and Astronomy, University of California, Irvine
N. ROSTOKER
Affiliation:
Department of Physics and Astronomy, University of California, Irvine
Y. SONG
Affiliation:
Department of Physics and Astronomy, University of California, Irvine
A. VAN DRIE
Affiliation:
Department of Physics and Astronomy, University of California, Irvine
VITALY BYSTRITSKII
Affiliation:
Tri Alpha Energy Inc., Foothill Ranch, California
Get access Rights & Permissions [Opens in a new window]

Abstract

This paper summarizes experimental results on the injection and transport of intense, wide cross-section H+ plasma (PB), and ion beams (IB), in vacuum and ambient H+ plasma across an applied B-field. The injection of plasma and ion beams into magnetic confinement devices have the potential to heat and support current in these systems (e.g., field-reversed configurations). The translational energies of the PB and IB ranged between Epb = 60 to 120 eV and EIB = 60 to 120 keV, with temperatures and densities in the range of Tb ∼ 2 to 10 eV, nb ∼ 1012 to 1013 cm−3, and Tb ∼ 200 eV, nb 1010 to 1011 cm−3, respectively. Compared to earlier studies (Peter et al., 1979; Wessel et al., 1988, 1990), this research extends the experimental parameter space to higher beam current densities (up to 30 A/cm2) and higher B-field strengths up to 1.6 kG. The PB and IB were both about 10 cm in diameter at the injection port, and the ratio of beam specific energy to ambient B-field specific energy, β, was in the range of 0.1 to 10. Ratios of beam Larmor radius to beam size, ρ, ranged from 10−1 to 1 and 1 to 10 for the PB and IB, respectively. Cross B-field propagation of the PB in vacuum was undeflected as a whole with a sharp increase (one order or more) in the current density of the central beam core at B-field levels > 1 kG accompanied by a significant loss of beam peripheral layers, beam “braking” and preferential beam expansion along the B-field lines. Cross B-field propagation of the PB in ambient plasma did not differ substantially from the case without B-field, that is, no deflection of the PB as a whole, which could be due to an insufficient neutralization of the induced E-field inside the PB. Cross B-field propagation of the IB in ambient plasma followed a single particle trajectory deflection with a simultaneous significant loss of IB intensity without any detectable bunching, indicating an adequate shorting of the polarization E-field inside the IB.

Keywords

Ion beamPlasma beamTransport across B-field
Type
Research Article
Information
Laser and Particle Beams , Volume 23 , Issue 2 , June 2005 , pp. 117 - 129
Copyright
2005 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Anderson, M., Bystritskii, V., Garate, E., Qerushi, A., Rostoker, N., Song, Y., Van Drie, A., Dettrick, S., Binderbauer, M. & Walters, J.K. (2004). Generation and transport of a low energy intense ion beam. J. Appl. Phys. 96, 1249.CrossRefGoogle Scholar
Armal, R. & Rostoker, N. (1996). Fast magnetic field penetration into a plasma beam. Phys. Plasmas 3, 2742.CrossRefGoogle Scholar
Bystritskii, V. & Didenko, N. (1989). High Power Ion Beams, New York: AIP.
Bystritskii, V.M., Voznyak, Y.A., Gula, A., Dzhelepov, V.P., Kapyshev, V.K., Malek, M.P., Mukhamet-Galeeva, S.S.H., Rivkis, L.A., Stolupin, V., Utkin, V.A. & Shamsudinov, S. (1984). Gas-supply system for a liquid-tritium target with a sensitive volume of 35 cm/sup 3/. Pribory I Tekhnika Eksperimenta 27, 46–49.Google Scholar
Cheng, D. (1990). Deflagration thruster. Nuclear Electric Propulsion Workshop, Pasadena, CA, June 19–22, pp. 78–81.
Dailey, L. (1965). Plasma properties in an inductive pulsed plasma accelerator. AIAA Volume, 65–637.
Humphries, S., Sudan, R.N. & Wiley, L. (1976). Extraction and focusing of intense ion beams from a magnetically insulated diode. J. Appl. Phys. 47, 2382.CrossRefGoogle Scholar
Morozov, A.I., Tereshin, V.I., Hebotarev, V.V., Solyakov, D.G., Garkusha, I.E., Makhlaj, V.A., Trubchaninov, S.A., Mitina, N.I., Tsarenko, A.V. & Wuerz, H. (2002). Powerful quasi-steady-state plasma accelerator for fusion experiments. Braz. J. Phys. 32, 165.CrossRefGoogle Scholar
Morozov, A. (1974). Physics and Application of Plasma Accelerators. Minsk, Russia: Nauka i Technika.
Niemann, C., Penache, D., Tauschwitz, A., Rosmej, F.B., Neff, S., Birkner, R., Constantin, C., Knobloch, R., Presura, R., Yu, S.S., Sharp, W.M., Ponce, D.M. & Hoffmann, D.H.H. (2003). Diagnostics of discharge channels for neutralized chamber transport in heavy ion fusion. Laser Part. Beams 21, 13.CrossRefGoogle Scholar
Peter, W., Ron, A. & Rostoker, N. (1979). Propagation of a wide ion beam into a magnetic barrier. Phys. Flu. 22, 1471.CrossRefGoogle Scholar
Rai, V.N., Singh, J.P., Yueh, F.Y. & Cook, R.L. (2003). Study of the optical emission from laser produced plasma expanding across an extended magnetic field. Laser Part. Beams 21, 65.CrossRefGoogle Scholar
Song, J. (1990). Injection, Propagation and Magnetization of Plasma Beams in Transverse Magnetic Field and Magnetized Plasmas. PhD Dissertation Thesis, Irvine: University of California.
Wessel, W., Hong, R., Song, J., Fisher, A., Rostoker, N., Ron, A., Li, R. & Fan, R. (1988). Plasmoid propagation in a transverse magnetic field and in a magnetized plasma. Phys. Flu. 31, 3778.CrossRefGoogle Scholar
Wessel, F., Rostoker, N., Fisher, A., Rahman, H. & Song, J. (1990). Propagation of neutralized plasma beams. Phys. Flu. B 2, 1476.CrossRefGoogle Scholar