Research output: Contribution to journal › Article › peer-review
Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients. / (AWAKE Collaboration).
In: Physical Review Accelerators and Beams, Vol. 24, No. 10, 101301, 10.2021.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients
AU - (AWAKE Collaboration)
AU - Morales Guzmán, P. I.
AU - Muggli, P.
AU - Agnello, R.
AU - Ahdida, C. C.
AU - Aladi, M.
AU - Amoedo Goncalves, M. C.
AU - Andrebe, Y.
AU - Apsimon, O.
AU - Apsimon, R.
AU - Bachmann, A. M.
AU - Baistrukov, M. A.
AU - Batsch, F.
AU - Bergamaschi, M.
AU - Blanchard, P.
AU - Braunmüller, F.
AU - Burrows, P. N.
AU - Buttenschön, B.
AU - Caldwell, A.
AU - Chappell, J.
AU - Chevallay, E.
AU - Chung, M.
AU - Cooke, D. A.
AU - Damerau, H.
AU - Davut, C.
AU - Demeter, G.
AU - Dexter, A.
AU - Doebert, S.
AU - Farmer, J.
AU - Fasoli, A.
AU - Fedosseev, V. N.
AU - Fiorito, R.
AU - Fonseca, R. A.
AU - Furno, I.
AU - Gessner, S.
AU - Gorn, A. A.
AU - Granados, E.
AU - Granetzny, M.
AU - Graubner, T.
AU - Grulke, O.
AU - Gschwendtner, E.
AU - Guran, E. D.
AU - Hafych, V.
AU - Henderson, J. R.
AU - Hüther, M.
AU - Kedves, M.
AU - Khudyakov, V.
AU - Kim, S. Y.
AU - Kraus, F.
AU - Lotov, K. V.
AU - Tuev, P. V.
N1 - Funding Information: This work was supported in part by a Leverhulme Trust Research Project Grant No. RPG-2017-143 and by STFC (AWAKE-UK, Cockcroft Institute core, John Adams Institute core, and UCL consolidated grants), United Kingdom; a Deutsche Forschungsgemeinschaft Project Grant No. PU 213-6/1 “Three-dimensional quasi-static simulations of beam self-modulation for plasma wakefield acceleration”; the National Research Foundation of Korea (No. NRF-2016R1A5A1013277 and No. NRF-2020R1A2C1010835); the Portuguese FCT—Foundation for Science and Technology, through Grants No. CERN/FIS-TEC/0032/2017, No. PTDC-FIS-PLA-2940-2014, No. UID/FIS/50010/2013 and No. SFRH/IF/01635/2015; the U.S. National Science Foundation under Grant No. PHY-1903316; the Wolfgang Gentner Programme of the German Federal Ministry of Education and Research (Grant No. 05E15CHA); M. W. acknowledges the support of DESY, Hamburg. Support of the National Office for Research, Development and Innovation (NKFIH) under Contract No. 2019-2.1.6-NEMZ_KI-2019-00004 and the support of the Wigner Datacenter Cloud facility through the Awakelaser project is acknowledged. The work of V. H. has been supported by the European Union’s Framework Programme for Research and Innovation Horizon 2020 (2014–2020) under the Marie Sklodowska-Curie Grant Agreement No. 765710. The AWAKE collaboration acknowledges the SPS team for their excellent proton delivery. Publisher Copyright: © 2021 authors. Published by the American Physical Society.
PY - 2021/10
Y1 - 2021/10
N2 - 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 [F. Braunmller, T. Nechaeva et al. (AWAKE Collaboration), Phys. Rev. Lett. 125, 264801 (2020)PRLTAO0031-900710.1103/PhysRevLett.125.264801]: with negative gradients, the charge of the modulated bunch is lower than with positive gradients. In addition, the bunch modulation frequency varies with gradient. Simulation results show that dephasing of the wakefields with respect to the relativistic protons along the plasma is the main cause for the loss of charge. The study of the modulation frequency reveals details about the evolution of the self-modulation process along the plasma. In particular for negative gradients, the modulation frequency across time-resolved images of the bunch indicates the position along the plasma where protons leave the wakefields. Simulations and experimental results are in excellent agreement.
AB - 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 [F. Braunmller, T. Nechaeva et al. (AWAKE Collaboration), Phys. Rev. Lett. 125, 264801 (2020)PRLTAO0031-900710.1103/PhysRevLett.125.264801]: with negative gradients, the charge of the modulated bunch is lower than with positive gradients. In addition, the bunch modulation frequency varies with gradient. Simulation results show that dephasing of the wakefields with respect to the relativistic protons along the plasma is the main cause for the loss of charge. The study of the modulation frequency reveals details about the evolution of the self-modulation process along the plasma. In particular for negative gradients, the modulation frequency across time-resolved images of the bunch indicates the position along the plasma where protons leave the wakefields. Simulations and experimental results are in excellent agreement.
UR - http://www.scopus.com/inward/record.url?scp=85117247733&partnerID=8YFLogxK
U2 - 10.1103/PhysRevAccelBeams.24.101301
DO - 10.1103/PhysRevAccelBeams.24.101301
M3 - Article
AN - SCOPUS:85117247733
VL - 24
JO - Physical Review Accelerators and Beams
JF - Physical Review Accelerators and Beams
SN - 2469-9888
IS - 10
M1 - 101301
ER -
ID: 34463341