Nanosecond air breakdown parameters for electron and microwave beam propagation

Optimization of Process Parameters of Electron Beam Welded Fe49Co2V Alloys

Electron beam welding has shown a remarkable job in the space industry for welding of components. It is performed under a vacuum environment that eliminates foreign matter such as hydrogen, oxygen, and other gases. Joining of similar and dissimilar materials is the main advantage of electron beam welding with high depth to width ratio as well as sharp focus at the point where parts are to be we...

Photon-beam subsource sensitivity to the initial electron-beam parameters.

One limitation to the widespread implementation of Monte Carlo (MC) patient dose-calculation algorithms for radiotherapy is the lack of a general and accurate source model of the accelerator radiation source. Our aim in this work is to investigate the sensitivity of the photon-beam subsource distributions in a MC source model (with target, primary collimator, and flattening filter photon subsou...

Nanosecond polarization-resolved laser-induced breakdown spectroscopy.

It is shown that the continuum emission produced in the ablation of an Al target with nanosecond laser pulses is much more strongly polarized than the discrete line emission. This effect may be utilized to improve the resolution of the laser-induced breakdown spectroscopy spectrum by using a polarizer to filter out the continuum background. The effects of laser fluence and focal position are al...

Determination of Process Parameters for Electron Beam Sintering (EBS)

Additive Layer Manufacturing (ALM) methods, like Electron Beam Sintering (EBS) constitute an interesting process concerning the production of small series and customised products. However, transient effects occur during processing due to the different physical principles of an electron beam (EB). Thus, process knowledge from similar ALM technologies, for instance Selective Laser Melting, can no...

Pulsed electron beam propagation in argon and nitrogen gas mixture