It is well known that ultrasonic pulses can be generated in condensed materials by thermal sources caused by intense particles beams bombardment, such as the beams of photons, electrons, protons, and ions. For energy ...It is well known that ultrasonic pulses can be generated in condensed materials by thermal sources caused by intense particles beams bombardment, such as the beams of photons, electrons, protons, and ions. For energy ion beam impinging on a material, the beam deposits its energy gradually along the ion trajectory and a cylinder of heated material is created. The pressure in the heated zone initializes a two-dimensional shock wave or ultrasonic wave (along the radial direction as well along the beam direction). We refer this effect展开更多
We have experimentally investigated interactions between impurities and hydrodynamic solitons in a shallow water trough subject to vertical vibration. The impurities are minor convex and concave defects located on the...We have experimentally investigated interactions between impurities and hydrodynamic solitons in a shallow water trough subject to vertical vibration. The impurities are minor convex and concave defects located on the bottom of the trough, slightly varying the water depth. The experiments show that a shallow impurity will attract breathers and kinks while a deep one will repel them. These observations are consistent with the theoretical prediction proposed in the continuous Frankel-Kontorova model with impurities and can also be explained in the view of energy absorption.展开更多
文摘It is well known that ultrasonic pulses can be generated in condensed materials by thermal sources caused by intense particles beams bombardment, such as the beams of photons, electrons, protons, and ions. For energy ion beam impinging on a material, the beam deposits its energy gradually along the ion trajectory and a cylinder of heated material is created. The pressure in the heated zone initializes a two-dimensional shock wave or ultrasonic wave (along the radial direction as well along the beam direction). We refer this effect
文摘We have experimentally investigated interactions between impurities and hydrodynamic solitons in a shallow water trough subject to vertical vibration. The impurities are minor convex and concave defects located on the bottom of the trough, slightly varying the water depth. The experiments show that a shallow impurity will attract breathers and kinks while a deep one will repel them. These observations are consistent with the theoretical prediction proposed in the continuous Frankel-Kontorova model with impurities and can also be explained in the view of energy absorption.
