Ultrahigh gradient particle acceleration by intense laser-driven plasma density waves

Excitation and Control of Plasma Wakefields by Multiple Laser Pulses

“…The MP-LWFA approach is closely related to the plasma beat-wave accelerator (PBWA) [1,33], in which two long laser pulses of angular frequencies ω 1 and ω 2 = ω 1 + ω p0 are combined to form a driving pulse modulated at ω p0 . Beat-wave excitation of plasma waves [34][35][36], and their application to accelerating electrons [37,38], have both been demonstrated.…”

Simulation of ultrashort electron pulse generation from optical injection into wake-field plasma waves

“…The laser wakefield accelerator (LWFA) [1][2][3][4] uses a single pump pulse with a pulse width p ϳ 2 / p , where p is the plasma frequency. Another technique, the beat-wave accelerator, uses the beat of two longer pulses to generate a train of short pulses [15]. Finally, the most efficient method is the resonant laser-plasma accelerator [16], which uses a series of pump pulses with increasing spacing between them and decreasing pulse widths to compensate for the change in resonance as the plasma wave grows and p changes.…”

Energy Spread Reduction of Electron Beams Produced via Laser Wake

“…However, when LWFA was first proposed the available laser pulse lengths were >3 orders of magnitude too long to drive the wake directly; fortunately, beating of two co-propagating laser pulses with a frequency difference of a plasma frequency (beat-wave LWFA, or BWLWFA) provided a platform for early theoretical and experimental work [5]. The first demonstration of a driven wake in this regime was published in 1985 [6], but it was not until 1993 that electrons were successfully injected into, trapped, and accelerated by the wake [7].…”