The pressure dependence of spontaneous magnetic fields in laser produced plasmas
Bird, Ronald Stanley
MetadataShow full item record
A plasma has been produced by irradiation of an aluminum slab with a 6.6 joule ,22 nanosecond (10 v watt/cm ) pulse of 1.06 micron radiation. Magnetic fields were observed to arise spontaneously when the laser-produced plasma was formed. The space and time behavior of the spontaneous magnetic fields and their relationship to the plasma density profile for expansion into various background pressures of H ? , He, N and Ar was investigated using magnetic and electrostatic (double) probes. The magnitude and direction of the magnetic fields was found to depend on the background gas pressure. The generation of spontaneous magnetic fields at the front of the expanding laser plasma was observed long after laser irradiation ceased. These fields were axially symmetric and in a direction opposite to the initial field direction. Reverse fields were observed only above a "critical" background gas pressure. Magnetic fields were also observed to arise when a laser plasma impinged on a glass plate.
Showing items related by title, author, creator and subject.
Carter, John P. (Monterey, California. Naval Postgraduate School, 1994-06);Laser produced plasma jets interacting with a background plasma have been used to study magnetic field generation in shock waves. Shock heating produces axial electron temperature and density gradients which are perpendicular ...
Naval Postgraduate School Physics (2015);Magnetic Forces and Magnetic Fields Hi. I’m Dr. Bruce Denardo here in the Physics Department of the Naval Postgraduate School in Monterey, California. When a charged particle moves through a magnetic field, a force on the ...
McKee, Leslie Lawrence III (1972-12);A plasma was produced by irradiating a 5 mil thick Mylar (C(10)H(8)O(4)) foil with a 300 MW, 25 nsec Nd laser pulse. Magnetic fields were observed to spontaneously arise when the laser-produced plasma was formed. The ...