Plasma Formed by a Laser Pulse on a Tungsten Target

Abstract

Results are presented of an experimental study of the plasma produced by the interaction of the focused light from a Q-switched laser with a tungsten target in a vacuum. The plasma radius, temperature, and radiative properties were measured during the period of the laser pulse. In addition, the target mass loss and plasma velocity and impulse were observed. Based on these experimental results, a model was developed which provides an energy and power balance for the expanding, radiating plasma.

Development of a silver ion source using nanosecond pulses of a Nd:YAG laser at different wavelengths

“…This investigation deals with the kinetic energy of evaporated ions, determined by time of flight measurements [26][27][28][29]. Time of flight (TOF) studies of the plasma give vital information regarding the time taken by a particular state of the constituents to evolve after the plasma is formed.…”

Metal-oxide-metal diode as infrared and visible radiation detector

“…There are some lines in the shorter wavelength region (2 < 48A) which correspond to highly ionized species but it is not possible at present to identify them because of the lack of spectral data. Ehler (1966) has also recorded the emission from a tungsten plasma at a temperature of about 30 eV and observed the predominant continuum in the region 125 &-4OO A.…”

Spatial differentiation of optical emission in Q-switched laser-induced plasmas and effects on spectral line analytical sensitivity

“…The formation of a plasma is a complex, non-equilibrium process. Gradients of pressure, temperature, and electron density exist across the plasma volume (6)(7)(8) and the spectral emission response to these factors varies among elements and molecules (9)(10)(11). There is evidence of nonhomvision, Menlo Park, Calif. 94025. ogeneity of composition within the plume (12).…”