## Search

Now showing items 1-10 of 23

#### Laser-Driven Acceleration In Clustered Plasmas

(2009-01)

We propose a new approach to avoid dephasing limitation of laser wakefield acceleration by manipulating the group velocity of the driving pulse using clustered plasmas. We demonstrated the control of phase velocity in ...

#### Magnetized Plasma-Filled Waveguide: A New High-Gradient Accelerating Structure

(2009-01)

Electromagnetic waves confined between the metal plates of a plasma-filled waveguide are investigated. It is demonstrated that when the plasma is magnetized along the metallic plates., there exists a luminous accelerating ...

#### Cold Atom Ballistics By Coherent Control

(2008-04)

We use the technique of Stimulated Raman adiabatic passage (STIRAP) to affect transport of ultracold atoms between two optical lattices in relative motion. We show, using Floquet analysis and degenerate perturbation theory, ...

#### Bayesians Can Learn From Old Data

(2007-11)

In a widely-cited paper, Glymour (Theory and Evidence, Princeton, N. J.: Princeton University Press, 1980, pp. 63-93) claims to show that Bayesians cannot team from old data. His argument contains an elementary error. I ...

#### Attraction And Repulsion Of Multi-Color Laser Beams In Plasmas: A Computational Study

(2009-01)

The nonlinear interaction of high-power multi-color laser beams in plasmas is investigated numerically. Both the relativistic mass increase and the driven plasma wave contribute to the mutual beam-beam interaction and to ...

#### Nanoindentation Of Si Nanostructures: Buckling And Friction At Nanoscales

(2009-11)

A nanoindentation system was employed to characterize mechanical properties of silicon nanolines (SiNLs), which were fabricated by an anisotropic wet etching (AWE) process. The SiNLs had the linewidth ranging from 24 nm ...

#### Weak Nuclear Forces Cause The Strong Nuclear Force

(2008-05)

We determine the strength of the weak nuclear force which holds the lattices of the elementary particles together. We also determine the strength of the strong nuclear force which emanates from the sides of the nuclear ...

#### Emittance Control In Laser Wakefield Accelerator

(2001-05)

In this paper we summarize our recent effort and results in theoretical study of the emittance issues of multistaged Laser Wakefield Accelerator (LWFA) in TeV energy range, In such an energy regime the luminosity and ...

#### Optimization Of Laser Wakefield Acceleration

(2001)

Using an evolutionary strategy algorithm, we optimize the generalized transformer ration of a laser wakefield accelerator. The algorithm tests several realistic pulse shapes by integrating the fluid wakefield differential ...

#### Mechanistic Study Of Plasma Damage Of Low k Dielectric Surfaces

(2007-10)

Plasma damage to low k dielectric materials was investigated from a mechanistic point of view. Low k dielectric films were treated by plasma Ar, O-2, N-2/H-2, N-2 and H-2 in a standard RIE chamber and the damage was ...