A Plasma Wake Field Accelerator

Fine wakefield structure in the blowout regime of plasma wakefield accelerators

“…(because of the singular density growth at a nearly constant radial speed) and, according to (10), the singularity of E z . For the warm plasma, the edge of the blowout region is diffuse, currents of inward and outward moving electrons almost cancel each other, and no field singularity appears.…”

“…Various configurations of the drive beam were proposed in order to meet these requirements [8][9][10][11][12]. One option is to use a single high-density drive bunch (so-called blowout regime) [12].…”

Simulation of proton driven plasma wakefield acceleration

“…The electron beam driven acceleration that currently holds the record of the total energy gain in a plasma [8] is subject to the so-called transformer ratio limit [9]. For realistic beam shapes, the accelerated (witness) beam sees roughly the same field amplitude as the drive beam (driver) does.…”

Laser-seeded modulation instability in a proton driver plasma wakefield accelerator

“…In particle-beam driven plasma wakefield accelerators (PWA), 2 the maximum energy gain of the witness bunch is restricted by the transformer ratio limit, which roughly states that a witness bunch's energy cannot exceed twice the driver bunch's energy. 13 To achieve unprecedented electron beam energies in the TeV range, TeV proton beams from CERN's Large Hadron Collider (LHC) have been proposed as a driver in a proton driver plasma wakefield acclerator (PDPWA). 14,15 In order to efficiently excite plasma waves that produce large accelerating gradients, the driver beam should be of order one plasma wavelength, k p 2pc=x p , where x p ¼ ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi 4pe 2 n p0 =m e p is the plasma frequency, c is the speed of light, n p0 $ 10 15 cm À3 is the density of the unperturbed plasma, Àe and m e are the electron charge and mass, respectively.…”