Investigation of Relativistic and Charge-Displacement Self-Channelling of Intense Subpicosecond Ultraviolet (248 nm) Radiation in Plasmas. (Reannouncement with New Availability Information).

摘要

Experimental studies examining a new relativistic regime of high-intensity short-pulse propagation in plasmas have been performed which present evidence for the formation of a stable mode of spatially confined (channeled) propagation. For an electron density of approx. 1.35 x 10 to the 21st power/cu cm and a power of (4 + or - 1) x 10 to the 11th power W, the results indicate a channel radius < 1 micrometer and a peak intensity in the channel of approx. 10 to the 19th power W/sq cm W/cm2. Comparison of these findings with a dynamical theory yields agreement for both the longitudinal structure and the radial extent of the propagating channel observed. Strong x-ray emission in the kilovolt spectral range correlated with the channel formation was also detected.