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Title: Study of laser produced plasma in a longitudinal magnetic field

Journal Article · · Physics of Plasmas
DOI: https://doi.org/10.1063/1.5091702 · OSTI ID:1565863

In this work, 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 demonstrate an increase in the plasma electron density resulting from the magnetic confinement of the jet.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of Nevada, Reno, NV (United States)
Sponsoring Organization:
USDOE Economic Regulatory Administration (RG); USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Contributing Organization:
LANL Prism Corp.
Grant/Contract Number:
89233218CNA000001; SC0016500
OSTI ID:
1565863
Report Number(s):
LA-UR--18-31850
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 26; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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