A laser excited, sub-nanosecond, pulsed electron beam system is described. The system consists of a high voltage pulser and a coaxial triggered spark gap. The liquid spark gap discharges into a pulse forming line designed to produce and maintain a flat voltage pulse of 1ns duration on the cathode of a photodiode. A synchronized laser is used to illuminate the photo-cathode to produce an electro...

The anisotropic two-dimensional (2D) electron diffraction pattern of jet-cooled CS2 in an intense nanosecond Nd:YAG laser field (1064 nm, -0.64 TW/cm, 10 ns) was measured by a short-pulsed 25 keV electron beam packet (~7 ns) generated by irradiating a tantalum photocathode with the 4th harmonics of another nanosecond pulsed YAG laser light. It was confirmed from the numerical simulation of the ...

We present a quantum theory for the interaction of a quantum target with a time dependent matter beam. When several pulses in the incident beam arrive with a period tau, transitions between levels with an energy difference h/tau can be enhanced. Unlike all previous studies, we find that transitions in passive targets can distinguish between an incoherent beam and a beam with a coherent wave pac...

Cooling of hadron beams is critically important in the next generation storage rings for delivery unprecedented performance. One such application electron-ion collider presently under development US. The desire to develop electron coolers operation at much higher energies than previously achieved necessitates use radio-frequency (rf) fields acceleration as opposed conventional, electrostatic ap...

Using scanning and transmission electron microscopy, the analysis of structure, phase elemental composition contact zone system coating (high-entropy FeCrCoNiMn alloy)-substrate (5083 alloy) after electron-beam processing was performed. The formation a multiphase, multielement submicro- nanocrystalline structure has been established. high-speed cellular crystallization in layers adjacent to sub...

Longitudinal ion beam stacking with the combination of barrier rf system and cooling has been demonstrated in several experiments. Based on bunching effect found pulsed electron experiment at HIRFL-CSRm, we propose a new scheme using only beam, which voltage can be realized simultaneously. In this paper, introduce longitudinal along theory dynamics present simple analytical model. The simulatio...