Effects of an axial magnetic field on the current distribution in a Z-pinch implosion with preembedded magnetic field
Abstract
In this study, the fundamental physics of the magnetic field distribution in a plasma implosion with a pre-embedded magnetic field is investigated within a gas puff Z-pinch. Time and space resolved spectroscopy of the polarized Zeeman effect, applied for the first time, reveals the impact of a pre-embedded axial field on the evolution of the current distribution driven by a pulsed-power generator. The measurements show that the azimuthal magnetic field in the imploding plasma, even in the presence of a weak axial magnetic field, is substantially smaller than expected from the ratio of the driving current to the plasma radius. Much of the current flows at large radii through a slowly-imploding, low-density plasma. The development of a force-free current configuration is suggested to explain this phenomenon. Finally, previously unpredicted observations in higher-power imploding-magnetized-plasma experiments, including recent unexplained structures observed in the Magnetized Liner Inertial Fusion experiment, may be explained by the present discovery.
- Authors:
-
- Weizmann Inst. of Science, Rehovot (Israel)
- Naval Research Lab. (NRL), Washington, DC (United States). Plasma Physics Division
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Holon Institute of Technology (Israel)
- Publication Date:
- Research Org.:
- Cornell Univ., Ithaca, NY (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1466736
- Grant/Contract Number:
- NA0003764
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 122; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Mikitchuk, D., Cvejic, M., Doron, R., Kroupp, E., Stollberg, C., Maron, Y., Velikovich, A. L., Ouart, D., Giuliani, J.L., Mehlhorn, T. A., Yu, E. P., and Fruchtman, A. Effects of an axial magnetic field on the current distribution in a Z-pinch implosion with preembedded magnetic field. United States: N. p., 2018.
Web. doi:10.1103/PhysRevLett.122.045001.
Mikitchuk, D., Cvejic, M., Doron, R., Kroupp, E., Stollberg, C., Maron, Y., Velikovich, A. L., Ouart, D., Giuliani, J.L., Mehlhorn, T. A., Yu, E. P., & Fruchtman, A. Effects of an axial magnetic field on the current distribution in a Z-pinch implosion with preembedded magnetic field. United States. https://doi.org/10.1103/PhysRevLett.122.045001
Mikitchuk, D., Cvejic, M., Doron, R., Kroupp, E., Stollberg, C., Maron, Y., Velikovich, A. L., Ouart, D., Giuliani, J.L., Mehlhorn, T. A., Yu, E. P., and Fruchtman, A. Tue .
"Effects of an axial magnetic field on the current distribution in a Z-pinch implosion with preembedded magnetic field". United States. https://doi.org/10.1103/PhysRevLett.122.045001. https://www.osti.gov/servlets/purl/1466736.
@article{osti_1466736,
title = {Effects of an axial magnetic field on the current distribution in a Z-pinch implosion with preembedded magnetic field},
author = {Mikitchuk, D. and Cvejic, M. and Doron, R. and Kroupp, E. and Stollberg, C. and Maron, Y. and Velikovich, A. L. and Ouart, D. and Giuliani, J.L. and Mehlhorn, T. A. and Yu, E. P. and Fruchtman, A.},
abstractNote = {In this study, the fundamental physics of the magnetic field distribution in a plasma implosion with a pre-embedded magnetic field is investigated within a gas puff Z-pinch. Time and space resolved spectroscopy of the polarized Zeeman effect, applied for the first time, reveals the impact of a pre-embedded axial field on the evolution of the current distribution driven by a pulsed-power generator. The measurements show that the azimuthal magnetic field in the imploding plasma, even in the presence of a weak axial magnetic field, is substantially smaller than expected from the ratio of the driving current to the plasma radius. Much of the current flows at large radii through a slowly-imploding, low-density plasma. The development of a force-free current configuration is suggested to explain this phenomenon. Finally, previously unpredicted observations in higher-power imploding-magnetized-plasma experiments, including recent unexplained structures observed in the Magnetized Liner Inertial Fusion experiment, may be explained by the present discovery.},
doi = {10.1103/PhysRevLett.122.045001},
journal = {Physical Review Letters},
number = ,
volume = 122,
place = {United States},
year = {2018},
month = {8}
}
Web of Science
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Works referencing / citing this record:
Study of stability in a liner-on-target gas puff Z-pinch as a function of pre-embedded axial magnetic field
journal, January 2020
- Conti, F.; Aybar, N.; Narkis, J.
- Physics of Plasmas, Vol. 27, Issue 1