A comprehensive experimental study of focusing of relativistic electron beams with overdense and underdense plasma lenses is being conducted at the Beam Test Facility at LBNL [1]. Short (15ps rms) electron bunches, from the 50 MeV LBNL Advanced Light Source injector are transported through laser produced plasmas. The electron beam spot size and divergence at the plasma lens is adjusted using qu...

Much of the theory and experimentation concerning creation of a high-brightness electron beam from a photocathode, and then applying emittance compensation techniques, assumes that one must strive for a uniform density electron beam, having a cylindrical shape. On the other hand, this shape has large nonlinearities in the space-charge field profiles near the beam’s longitudinal extrema. These n...

this study addresses executive compensation from shareholders perspective by empirically examining the effects of chief executive officer (ceo) compensation on firm performance subsequent to the year of compensation. three factors of ceo compensation are examined, size, total annual compensation; form percentage of total compensation comprised of cash, cash bonuses and stock; and sensitivity. t...

Ti 1− x Cr O 2− /2− δ (0 ≤ 0.05) ceramics show high electronic conductivity at low attributed to oxygen vacancy compensation by co-doping with 3+ and ions. At intermediate , p-type is hole location on under-bonded oxygen.

We perform hybrid-density functional calculations to investigate the charged defect formation energy of native point defects in Mg2Si, Mg2Sn, and their solid solutions. The band gap correction by is found be critical determine density these materials. For Mg interstitials are dominant provide unintentional n-type conductivity. Additionally, as vacancies can dominate Mg-poor p-type conductivity ...