Conveners
9.1 Optical, X-ray, FIR, and Microwave Diagnostics and 9.3 Pulsed Power Diagnostics
- Clayton Myers (Sandia National Laboratories)
Optical spectroscopy in conjunction with laser-produced plasma (LPP) is a very promising tool for in-field and non-contact isotopic analysis of solid materials. Both emission and fluorescence spectroscopy of laser ablation plumes can be used for isotopic analysis. However, the reported isotopic shifts of U I and U II transitions in the visible spectral regime are in the range ~ 1-25 pm which...
Pulsed discharge plasmas which are one of the non-thermal plasma have been actively studied for industrial and environmental applications. The observation of discharge plasma formation is beneficial for better understanding of the plasma physics of this growing field. Generally, a pulsed discharge with time duration of 100s ns is divided into two phases, primary streamer and secondary streamer...
The capability to measure RF power in plasma systems has existed for many years but key parameters, such as impedance of the plasma and delivered power, can be difficult to measure with high accuracy. This is especially true in pulsed RF systems, where it is difficult for the system to achieve a conjugate match from the rapidly changing plasma impedance to the RF source, resulting in reflected...
The error of an air-core Rogowski coil caused by eccentricity or tilting of the conductor flowing through the measured current and interference magnetic field outside the area is analyzed under uniform and uneven coiling conditions. The error which is a function of the density of the windings along the bobbin is given. In the aspect of extraction of distribution parameters, a method combining...
Pulsed power experiments at Sandia National Laboratories' Z Pulsed Power Facility have traditionally utilized single material velocimetry flyers for diagnosing magnetic pressure, and hence current, within the magnetically insulated transmission lines (MITLs). More recent experiments at Sandia suggest that energy absorption through various mechanisms, such as charged particle loss, can...
Combustion efficiency and rate of ignition were shown to be improved when fuel-air ignition was initiated with highly non-equilibrium plasmas generated by high-voltage, nanosecond pulses, also known as transient plasma ignition (TPI). In order to optimize the pulse power parameters for plasma ignition for combustion, detailed experimental investigations of the effect of rise time and pulse...
