CERN Accelerating science

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1.
Localization of ionization-induced trapping in a laser wakefield accelerator using a density down-ramp / Hansson, M. (Lund U.) ; Audet, T. L. (LPGP, Orsay) ; Ekerfelt, H. (Lund U.) ; Aurand, B. (Lund U.) ; Gallardo Ganzalez, I. (Lund U.) ; Desforges, F. G. (LPGP, Orsay) ; Davoine, X. (CEA DAM) ; Maitrallain, A. (Saclay) ; Reymond, S. (Lund U. ; ENSTA, Paris) ; Monot, P. (Saclay) et al.
We report on a study on controlled trapping of electrons, by field ionization of nitrogen ions, in laser wakefield accelerators in variable length gas cells. In addition to ionization-induced trapping in the density plateau inside the cells, which results in wide, but stable, electron energy spectra, a regime of ionization-induced trapping localized in the density down-ramp at the exit of the gas cells, is found. [...]
CERN-ACC-2016-0050.- Geneva : CERN, 2016 - Published in : Plasma Phys. Control. Fusion 58 (2016) 055009 Fulltext: PDF;
2.
Down-ramp injection and independently controlled acceleration of electrons in a tailored laser wakefield accelerator / Hansson, M. (Lund U.) ; Aurand, B. (Lund U.) ; Davoine, X. (CEA DAM) ; Ekerfelt, H. (Lund U.) ; Svensson, K. (Lund U.) ; Persson, A. (Lund U.) ; Wahlström, C.-G. (Lund U.) ; Lundh, O. (Lund U.)
We report on a study on controlled injection of electrons into the accelerating phase of a plasma wakefield accelerator by tailoring the target density distribution using two independent sources of gas. The tailored density distribution is achieved experimentally by inserting a narrow nozzle, with an orifice diameter of only 400  μm , into a jet of gas supplied from a 2 mm diameter nozzle. [...]
CERN-ACC-2015-0211.- Geneva : CERN, 2015 - Published in : 10.1103/PhysRevSTAB.18.071303 Fulltext: PDF;
3.
Angular momentum evolution in laser-plasma accelerators / Thaury, Cédric (Laboratoire d'Optique Appliquée) ; Guillaume, E ; Corde, S ; Lehe, R ; Bouteiller, M Le ; Phuoc, K Ta ; Davoine, X ; Rax, J -M ; Rousse, A ; Malka, V
The transverse properties of an electron beam are characterized by two quantities, the emittance which indicates the electron beam extend in the phase space and the angular momentum which allows for non-planar electron trajectories. Whereas the emittance of electron beams produced in laser- plasma accelerator has been measured in several experiments, their angular momentum has been scarcely studied. [...]
arXiv:1306.0016; CERN-ACC-2013-0320.- 2013 - Published in : Phys. Rev. Lett. 111 (2013) 135002 External link: Preprint

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8 Davoine, X
2 Davoine, Xavier
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