CERN Accelerating science

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1.
Commissioning of the electron injector for the AWAKE experiment / Kim, S -Y (UNIST, Ulsan) ; Doebert, S (CERN) ; Apsimon, O (Manchester U.) ; Apsimon, R (Lancaster U.) ; Burt, G (Lancaster U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Dayyani, M (IPM, Tehran) ; Gessner, S (CERN) ; Gorgisyan, I (CERN) ; Granados, E (CERN) ; Mazzoni, S (CERN) et al.
The advanced wakefield experiment (AWAKE) at CERN is the first proton beam-driven plasma wakefield acceleration experiment. The main goal of AWAKE RUN 1 was to demonstrate seeded self-modulation (SSM) of the proton beam and electron witness beam acceleration in the plasma wakefield. [...]
2020 - 7 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 953 (2020) 163194 Fulltext: PDF;
2.
Development of the Self-Modulation Instability of a Relativistic Proton Bunch in Plasma / AWAKE Collaboration
Self-modulation is a beam-plasma instability that is useful to drive large-amplitude wakefields with bunches much longer than the plasma skin depth. We present experimental results showing that, when increasing the ratio between the initial transverse size of the bunch and the plasma skin depth, the instability occurs later along the bunch, or not at all, over a fixed plasma length, because the amplitude of the initial wakefields decreases. [...]
arXiv:2305.05478.- 2023-08-01 - 10 p. - Published in : Phys. Plasmas 30 (2023) 083104 Fulltext: 2305.05478 - PDF; Publication - PDF;
3.
Hosing of a long relativistic particle bunch in plasma / AWAKE Collaboration
Experimental results show that hosing of a long particle bunch in plasma can be induced by wakefields driven by a short, misaligned preceding bunch. Hosing develops in the plane of misalignment, self-modulation in the perpendicular plane, at frequencies close to the plasma electron frequency, and are reproducible. [...]
arXiv:2309.03785.- 2024-02-13 - 7 p. - Published in : Phys. Rev. Lett. 132 (2024) 075001 Fulltext: 2309.03785 - PDF; Publication - PDF;
4.
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.
- 8 p.
Fulltext
5.
Experimental Study of Wakefields Driven by a Self-Modulating Proton Bunch in Plasma / AWAKE Collaboration
We study experimentally the longitudinal and transverse wakefields driven by a highly relativistic proton bunch during self-modulation in plasma. We show that the wakefields' growth and amplitude increases with increasing seed amplitude as well as with the proton bunch charge in the plasma. [...]
arXiv:2005.05277.- 2020-08-05 - 8 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 081302 Fulltext: PDF; Fulltext from Publisher: PDF;
6.
Filamentation of a Relativistic Proton Bunch in Plasma / AWAKE Collaboration
We show in experiments that a long, underdense, relativistic proton bunch propagating in plasma undergoes the oblique instability, that we observe as filamentation. We determine a threshold value for the ratio between the bunch transverse size and plasma skin depth for the instability to occur. [...]
arXiv:2312.13883.- 2024-05-07 - 8 p. - Published in : Phys. Rev. E 109 (2024) 055203 Fulltext: Publication - PDF; 2312.13883 - PDF; External link: Physics Synopsis
7.
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;
8.
Experimental observation of plasma wakefield growth driven by the seeded self-modulation of a proton bunch / AWAKE Collaboration
We measure the effects of transverse wakefields driven by a relativistic proton bunch in plasma with densities of $2.1\times10^{14}$ and $7.7\times10^{14}$ electrons/cm$^3$. We show that these wakefields periodically defocus the proton bunch itself, consistently with the development of the seeded self-modulation process. [...]
arXiv:1809.01191.- 2019-02-09 - 7 p. - Published in : Phys. Rev. Lett. 122 (2019) 054801 Fulltext: PDF; Fulltext from Publisher: PDF;
9.
Electron Beam Based Leather Tanning / Apsimon, Robert (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Dewhurst, Kay (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech. ; CERN) ; Setiniyaz, Sadiq (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Seviour, Rebecca (Huddersfield U.) ; Turner, Daniel (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Wise, William (Unlisted, UK)
Tanning of leather for clothing, shoes, and handbags uses potentially harmful chemicals that often run off into local water supplies or require a large carbon footprint to safely recover these pollutants. In regions of the world with significant leather production, this can lead to a significant environmental impact. [...]
2022 - 5 p. - Published in : JACoW LINAC 2022 (2022) 645-649 Fulltext: PDF;
In : 31st Linear Accelerator Conference (LINAC22), Liverpool, UK, 28 Aug - 2 Sep 2022, pp.645-649
10.
Evolution of a plasma column measured through modulation of a high-energy proton beam / AWAKE Collaboration
Plasma wakefield acceleration is a method for accelerating particle beams using electromagnetic fields that are orders of magnitude larger than those found in conventional radio frequency cavities. [...]
arXiv:2006.09991.
- 22 p.
Fulltext

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