Erosion Tests of Materials by Energetic Particle Beams

Solid Particle Erosion on Different Metallic Materials

Surface erosion and modification by energetic ions

Surface erosion and modification by energetic highly charged and cluster ions are important in the development of semiconductor devices, TeV accelerators, fission and fusion reactors, and in the development of extreme ultra-violet lithography devices. Gas cluster ion beam (GCIB) surface treatment can significantly mitigate the high-gradient electric vacuum breakdown of rf-cavities. GCIB can als...

Stopping Energetic Beams in Gas

The stopping of Ar beams at energies up to 100 MeV/nucleon in a combination of Al energy degrader and He gas volume was investigated. The range straggling was not largely enhanced by the energy degrader. A Monte Carlo simulation was applied in order to calculate the spatial distribution of stopped ions in the gas.  2002 Elsevier Science B.V. All rights reserved.

Polymorphism in Energetic Materials

Polymorphism often occurs in energetic materials. Differences in the forms range from conformational changes in the molecule from one system to another, to conformational equivalents packing in different manners. These differences, whether drastic or subtle, can lead to substantial alterations in stability and performance. The authors recently reported on the crystal structures of five polymorp...

Investigation Resistance of Sediment Particle to Erosion in Saraskanchai River by Use of Mathematical Methods

In addition to Erodibility of sediment particles in river increase river sediment load, they are important factors in morphological changes. In the rivers that erodibility is high, trend of morphological changes are intensive that in this case, river is unstable. On the contrary, it will lead stability and low changes of the river. Study area of this research is Saraskanchay that has been locat...