18–24 Sept 2022
Hotel Hermitage, La Biodola Bay, Isola d'Elba, Italy
Europe/Rome timezone

Demonstration of divergence reduction of laser driven wakefield accelerated electron beams using a compact plasma lens generator

21 Sept 2022, 19:15
1h
Sala Elena - Hotel Hermitage

Sala Elena - Hotel Hermitage

Speaker

Yen-Yu Chang (Helmholtz Zentrum Dresden Rossendorf)

Description

We demonstrate the divergence reduction of laser driven wakefield accelerated electron beams using a compact plasma lens in a single stage setup. We modify the gas density profile of a super sonic gas jet and create a shallow second density bump, which serves as a passive plasma lens, using a small ($<1$cm$^3$) metal wedge. The plasma lens decreases the electron beam divergence from averaged $2.1$ down to $0.98$ mrad (r.m.s.), while at the same time, the changing of the peak energy and the charge of the beam with or without the plasma lens is within the error bar. As a result, the plasma lens preserves the peak current ($\sim10$kA) of the electron beam and drastically increases the peak charge density from averaged $1.8$ to $4.7$ pC/(MeV*mrad). This new technique unlocks the possibility of generating arbitrary gas density in a simple and compact setup, which is essential for achieving adiabatic focusing or staging acceleration.

Primary authors

Alexander Debus (Helmholtz-Zentrum Dresden-Rossendorf) Amin Ghaith (SOLEIL) Arie Irman (Helmholtz Zentrum Dresden Rossendorf) Yen-Yu Chang (Helmholtz Zentrum Dresden Rossendorf) Dr Jurjen Couperus Cabadag (Helmholtz Zentrum Dresden Rossendorf) Klaus Steiniger (Helmholtz-Zentrum Dresden-Rossendorf) Mr Max LaBerge (University of Texas at Austin) Patrick Ufer (Helmholtz-Zentrum Dresden-Rossendorf) Richard Pausch (Helmholtz-Zentrum Dresden - Rossendorf) Susanne Schoebel (Helmholtz-Zentrum Dresden-Rossendorf) Ulrich Schramm (Helmholtz-Zentrum Dresden-Rossendorf)

Presentation materials