A new concept m accelerating electrons by a hagh power laser beam as discussed The acceleration takes place m the field patterns produced by the superposlhon of four waves an the focus of a lens The matching of the pamcle veloeaty as done by a barefrmgent crystal outside the focus

The transfer of energy from the driving beam to the trailing beam in the plasma wake field accelerator is studied in computer simulations. We show that with an asymmetric current distribution in the driving bunch, trailing particles can gain energies up -to 4 1 + k2Z2Aymc2 P , where 2 is the bunch length, and A,ymc2 the average energy loss of driving electrons. Due to the relative phase slippag...

A newly developed high-performance multiimager VGA camera array is described. Designed for synchronization, bandwidth, and economy within a videoconferencing application, and demonstrated initially through novel video mosaicking, the system shows promise for accelerating the new field of multi-viewpoint imaging. We describe the camera system’s design, control, performance characteristics, use i...

Tracking simulations have been performed for a realistic design of main linacs of X-band linear collider. We discuss about choice of the phase of the accelerating field relative to the bunches. The tolerances of the phase and the amplitude errors are studied.

Reconfigurable coprocessors, most commonly implemented with field programmable gate array (FPGA) technology, have been shown effective in accelerating certain classes of applications. Computation-intense kernels can be selected automatically or by hand for acceleration using the coprocessor. For each kernel selected, aconfiguration must be constructed to implement the computation graph of the k...

We find that holographic dark energy model with non-minimally coupled scalar field gives rise to an accelerating universe by choosing Hubble scale as IR cutoff. We show viable range of a non-minimal coupling parameter in the framework of this model. ∗[email protected]

The ever-growing demand for higher RF gradients has considerably increased the risk of breakdown in accelerating structures. Field emission is the most common form of RF breakdown that generates free electrons capable of inflicting irreversible damages on the RF surface. This paper presents a systematic experimental and simulation programme to understand possible sources and their influence on ...