High energy photon emission from wakefields

2018

Physics of Plasmas

In some laboratory and most astrophysical situations plasma wake-field acceleration of electrons is one dimensional, i.e. variation transverse to the beam's motion can be ignored. Thus, one dimensional (1D), particle-in-cell (PIC), fully electromagnetic simulations of electron plasma wake field acceleration are conducted in order to study the differences in electron plasma wake field acceleration in MeV versus GeV and linear versus blowout regimes. First, we show that caution needs to be taken when using fluid simulations, as PIC simulations prove that an approximation for an electron bunch not to evolve in time for few hundred plasma periods only applies when it is sufficiently relativistic. This conclusion is true irrespective of the plasma temperature. We find that in the linear regime and GeV energies, the accelerating electric field generated by the plasma wake is similar to the linear and MeV regime. However, because GeV energy driving bunch stays intact for much longer time, the final acceleration energies are much larger in the GeV energies case. In the GeV energy range and blowout regime the wake's accelerating electric field is much larger in amplitude compared to the linear case and also plasma wake geometrical size is much larger. Thus, the correct positioning of the trailing bunch is needed to achieve the efficient acceleration. For the considered case, optimally there should be approximately (90 − 100)c/ωpe distance between trailing and driving electron bunches in the GeV blowout regime.

Section: Introductionmentioning

confidence: 99%

Differences in 1D electron plasma wake field acceleration in MeV versus GeV and linear versus blowout regimes

2018

Physics of Plasmas

“…Also there has been interesting progress in applying PWFA concepts to astrophysical plasmas. This includes astrophysical ZeV acceleration in the relativistic jet from an accreting supermassive blackhole [10,11], focusing on ponderomotive acceleration by relativistic waves [12] and elecromagnetic aspects [13]. A comprehensive, recent review is available [14].…”

Section: Introductionmentioning

confidence: 99%

Electron plasma wake field acceleration in solar coronal and chromospheric plasmas

2017

Physics of Plasmas

Three dimensional, particle-in-cell, fully electromagnetic simulations of electron plasma wake field acceleration applicable to solar atmosphere are presented. It is established that injecting driving and trailing electron bunches into solar coronal and chromospheric plasmas, results in electric fields (−(20−5)×10 6 V/m), leading to acceleration of the trailing bunch up to 52 MeV, starting from initial 36 MeV. The results provide one of potentially important mechanisms for the extreme energetic solar flare electrons, invoking plasma wake field acceleration.

“…Accordingly, they are known as laser wake field acceleration (LWFA) and the latter as plasma wake field acceleration (PWFA). A good progress in PWFA has been made both in experiment and theory [3][4][5][6][7][8][9][10]. Further, Ref.…”

mentioning

confidence: 96%

New Regime of Plasma Wake-Field Acceleration in the Extreme Blowout Regime

IEEE Trans. Plasma Sci.

2019

Three dimensional particle in cell simulations are used for studying proton driven plasma wakefield acceleration that uses a high-energy proton bunch to drive a plasma wake-field for electron beam acceleration. A new parameter regime was found which generates essentially constant electric field that is three orders magnitudes larger than that of AWAKE design, i.e. of the order of 2 × 10 3 GV/m. This is achieved in the the extreme blowout regime, when number density of the driving proton bunch exceeds plasma electron number density 100 times.