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SUMMARY:Towards dephasingless LWFA
DTSTART:20260611T080000Z
DTEND:20260611T100000Z
DTSTAMP:20260613T083800Z
UID:indico-event-283@indico.eli-np.ro
DESCRIPTION:Speakers: Golovanov Anton\n\nWe present recent numerical and e
 xperimental studies of flying-focus laser-wakefield accelerators (LWFAs) a
 t the Weizmann Institute. Flying-focus laser pulses are created by combini
 ng spatio-temporal couplings with an axiparabola\, a mirror that produces 
 an extended focal region. Wakefields driven by such pulses have a tunable 
 phase velocity and offer a potential route to overcoming electron dephasin
 g\, a key limitation in scaling LWFAs to higher energies. We combine direc
 t imaging using femtosecond relativistic electron microscopy (FREM) with o
 ptical and particle-in-cell (PIC) simulations to study the wakefield struc
 ture in detail. Close correspondence between the simulations and the exper
 imental results gives us confidence that the simulations capture the key p
 hysical effects. We show that these wakefields differ significantly from c
 onventional parabola-driven wakefields and evolve strongly along the focal
  line. We present the first electrons accelerated in a flying-focus wakefi
 eld with velocity controlled through the pulse-front curvature. Statistica
 l analysis and PIC simulations show that this leads to measurable changes 
 in the accelerated electron energy\, consistent with partial compensation 
 of dephasing. While the focus of the seminar is flying-focus wakefields\, 
 I will also highlight several related research directions.\n\nhttps://indi
 co.eli-np.ro/event/283/
URL:https://indico.eli-np.ro/event/283/
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