Study of laser produced plasma in a longitudinal magnetic field

Laser produced plasma embedded in a longitudinal magnetic field was studied using a 1 MA pulsed power generator coupled with a 50 TW laser. Half turn coil loads with an internal diameter of 2.5–3.5 mm generate a 50–70 T axial magnetic field near the load. A subpicosecond laser pulse with an intensit...

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Bibliographic Details
Published in:Physics of plasmas 2019-06, Vol.26 (6)
Main Authors: Ivanov, V. V., Maximov, A. V., Betti, R., Leal, L. S., Mancini, R. C., Swanson, K. J., Golovkin, I. E., Fontes, C. J., Sawada, H., Sefkow, A. B., Wong, N. L.
Format: Article
Language:English
Subjects:
Coils
Collimation
Electron density
Electron plasma
Fluid dynamics
Fluid flow
Foils
Lasers
Magnetic fields
Magnetism
Magnetohydrodynamic simulation
Plasma
Plasma density
Plasma physics
X ray spectra
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Summary:Laser produced plasma embedded in a longitudinal magnetic field was studied using a 1 MA pulsed power generator coupled with a 50 TW laser. Half turn coil loads with an internal diameter of 2.5–3.5 mm generate a 50–70 T axial magnetic field near the load. A subpicosecond laser pulse with an intensity of 1018–1019 W/cm2 irradiates a thin Si foil target in the magnetic field of the coil load. A laser produced plasma plume collimates within the longitudinal field to a narrow jet 0.2–0.3 mm in diameter with a length of 3–4 mm and an electron plasma density of (0.2–1) × 1020 cm−3 on the jet axis. The jet propagates with a velocity of 160–200 km/s in general agreement with magnetohydrodynamic simulations. X-ray spectral measurements show an increase in the plasma electron density resulting from the magnetic confinement of the jet.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.5091702