CERN Accelerating science

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1.
Generation of 10-m-lengthscale plasma columns by resonant and off-resonant laser pulses / Demeter, G. (Wigner RCP, Budapest) ; Moody, J.T. (Munich, Max Planck Inst.) ; Kedves, M.A. (Wigner RCP, Budapest) ; Batsch, F. (Munich, Max Planck Inst. ; CERN) ; Bergamaschi, M. (Munich, Max Planck Inst.) ; Fedosseev, V. (CERN) ; Granados, E. (CERN) ; Muggli, P. (Munich, Max Planck Inst.) ; Panuganti, H. (CERN) ; Della Porta, G. Zevi (Munich, Max Planck Inst. ; CERN)
Creating extended, highly homogeneous plasma columns like that required by plasma wakefield accelerators can be a challenge. We study the propagation of ultra-short, TW power ionizing laser pulses in a 10-meter-long rubidium vapor and the plasma columns they create. [...]
arXiv:2302.07038.- 2023-08-14 - 10 p. - Published in : Opt. Laser Technol. 168 (2024) 109921 Fulltext: 2302.07038 - PDF; Publication - PDF;
2.
Mapping charge capture and acceleration in a plasma wakefield of a proton bunch using variable emittance electron beam injection / AWAKE Collaboration
In the Phase 2 of the AWAKE first experimental run (from May to November 2018), an electron beam was used to probe and test proton-driven wakefield acceleration in a rubidium plasma column. In this work, we analyze the overall charge capture and shot-to-shot reproducibility of the proton-driven plasma wakefield accelerator with various electron bunch injection parameters. [...]
arXiv:2206.14075.- 2022-07-19 - 4 p. - Published in : JACoW IPAC 2022 (2022) WEPOST039 Fulltext: document - PDF; 2206.14075 - PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.WEPOST039
3.
The AWAKE Run 2 programme and beyond / AWAKE Collaboration
Plasma wakefield acceleration is a promising technology to reduce the size of particle accelerators. Use of high energy protons to drive wakefields in plasma has been demonstrated during Run 1 of the AWAKE programme at CERN. [...]
arXiv:2206.06040.- 2022-08-12 - 21 p. - Published in : Symmetry 14 (2022) 1680 Fulltext: document - PDF; 2206.06040 - PDF;
4.
Controlled Growth of the Self-Modulation of a Relativistic Proton Bunch in Plasma / AWAKE Collaboration
A long, narrow, relativistic charged particle bunch propagating in plasma is subject to the self-modulation (SM) instability. We show that SM of a proton bunch can be seeded by the wakefields driven by a preceding electron bunch. [...]
arXiv:2203.13752.- 2022-07-06 - 7 p. - Published in : Phys. Rev. Lett. 129 (2022) 024802 Fulltext: 2203.13752 - PDF; PhysRevLett.129.024802 - PDF;
5.
Analysis of Proton Bunch Parameters in the AWAKE Experiment / AWAKE Collaboration
A precise characterization of the incoming proton bunch parameters is required to accurately simulate the self-modulation process in the Advanced Wakefield Experiment (AWAKE). This paper presents an analysis of the parameters of the incoming proton bunches used in the later stages of the AWAKE Run 1 data-taking period. [...]
arXiv:2109.12893.- 2021-11-24 - 14 p. - Published in : JINST 16 (2021) P11031 Fulltext: document - PDF; 2109.12893 - PDF;
6.
Long-range propagation of ultrafast ionizing laser pulses in a resonant nonlinear medium / Demeter, G. (Wigner RCP, Budapest) ; Moody, J.T. (Munich, Max Planck Inst.) ; Aladi, M. (Wigner RCP, Budapest) ; Bachmann, A.-M. (Munich, Max Planck Inst.) ; Batsch, F. (Munich, Max Planck Inst.) ; Braunmüller, F. (Munich, Max Planck Inst.) ; Djotyan, G.P. (Wigner RCP, Budapest) ; Fedosseev, V. (CERN) ; Friebel, F. (CERN) ; Gessner, S. et al.
We study the propagation of 0.05-1 TW power, ultrafast laser pulses in a 10 meter long rubidium vapor cell. The central wavelength of the laser is resonant with the $D_2$ line of rubidium and the peak intensity in the $10^{12}-10^{14} ~W/cm^2$ range, enough to create a plasma channel with single electron ionization. [...]
arXiv:2103.14530.- 2021-09-07 - 13 p. - Published in : Phys. Rev. A 104 (2021) 033506 Fulltext: PDF;
7.
Simulation and Experimental Study of Proton Bunch Self-Modulation in Plasma with Linear Density Gradients / AWAKE Collaboration
We present numerical simulations and experimental results of the self-modulation of a long proton bunch in a plasma with linear density gradients along the beam path. Simulation results agree with the experimental results reported in arXiv:2007.14894v2: with negative gradients, the charge of the modulated bunch is lower than with positive gradients. [...]
arXiv:2107.11369.- 2021-10-01 - 13 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 101301 Fulltext: Publication - PDF; 2107.11369 - PDF; Fulltext from publisher: PDF;
8.
Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma / AWAKE Collaboration
We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufficient initial amplitude ($\ge(4.1\pm0.4)$ MV/m), the phase of the modulation along the bunch is reproducible from event to event, with 3 to 7% (of 2$\pi$) rms variations all along the bunch. [...]
arXiv:2012.09676.- 2021-04-21 - 6 p. - Published in : Phys. Rev. Lett. 126 (2021) 164802 Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;
9.
Experimental study of extended timescale dynamics of a plasma wakefield driven by a self-modulated proton bunch / AWAKE Collaboration
Plasma wakefield dynamics over timescales up to 800 ps, approximately 100 plasma periods, are studied experimentally at the Advanced Wakefield Experiment (AWAKE). The development of the longitudinal wakefield amplitude driven by a self-modulated proton bunch is measured using the external injection of witness electrons that sample the fields. [...]
arXiv:2010.05715.- 2021-01-06 - 13 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 011301 Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;
10.
Proton beam defocusing in AWAKE: comparison of simulations and measurements / AWAKE Collaboration
In 2017, AWAKE demonstrated the seeded self-modulation (SSM) of a 400 GeV proton beam from the Super Proton Synchrotron (SPS) at CERN. [...]
arXiv:2008.11392.
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