Stable self-channeling of intense ultraviolet pulses in underdense plasma, producing channels exceeding 100 Rayleigh lengths

Electron Acceleration by a Laser Wakefield in a Relativistically Self-Guided Channel

“…In order to reach the high intensity necessary to create the plasma wave, the laser pulses must be focused tightly, and thus the interaction length will be short, limited by diffraction to the Rayleigh range ͑Z R pr 2 0 ͞l͒. Several methods have been proposed or demonstrated to extend the propagation distance beyond the diffraction limit, most notably preformed channels [4,11] and relativistically selfguided channels [12][13][14][15][16]. In this Letter, we report, for the first time, laser wakefield acceleration in a self-guided channel.…”

Relativistically Self-Channeled Femtosecond Terawatt Lasers for High-Field Physics and X-Ray Generation

“…The path of this trajectory demonstrates emphatically that the system asgressively moves toward the eigenmode and remains virtually locked in a small neighborhood of the eigenmode curve as the electron density (Ne) and correspondmg value of q both rise to the conditions of high power density. This dynamical behavior contrasts sharply with other mechanisms of self-focusins (e.g., Kerr and relativistic), which generally manifest very poor characteristics of stability (11,25,26).…”

Advanced Computational Physics Instrumentation

“…In order to simplify the calculation, we can use the smallest primitive root of P a , which has the value gmm = 14, since the residues corresponding to the supersymmetric Higgs pair are independent of the primitive root and depend only on the modulus P a . Hence, we evaluate the congruence Sj* -B ffiggs (modP a ) (40) and obtain the mass parameter of the pggs boson as …”

“…1) indicates that a UV laserpumped Xe L-shell system has great potential as a coherent 3Ä (*4keV) x-ray radiation source. Furthermore, the strong relativistic selPfocusing effects observed in Xe cluster targets under 248nm pump-laser irradiation [52] may produce an optimal guided-channel geometry [29,40] extending over several Rayleigh ranges for both the optical pumping and the x-ray emission. Fig.…”