Author:
Demydenko I.V.,Maslov V.I.
Abstract
Acceleration by the wakefield in the plasma can provide compact sources of relativistic electron beams of high brightness. Free electron lasers and particle colliders, using plasma wakefield accelerators, require high efficiency and beams with low energy spread. In this paper, we investigated by numerical simulation the focusing of Gaussiankind bunches by a passive plasma lens depending on their length. We have shown that for a homogeneous focusing field and to prevent loss of energy from bunches, the presence of an electron bunch-precursor is necessary. This plasma lens decreases the energy spread of bunches, since the first front of the bunch, which is of more energy, is in decelerating field, and its back front, which is of smaller energy, is in accelerating field. In addition, we investigated the evolution of the bunches with time to visually demonstrate the effect of the plasma lens in the wakefield accelerator.
Publisher
Problems of Atomic Science and Technology
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