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Transition between instability and seeded self-modulation of a relativistic particle bunch in plasma

Physical Review Letters American Physical Society 126:16 (2021) 164802

Authors:

F Batsch, P Muggli, R Agnello, Cc Ahdida, Mc Amoedo Goncalves, Y Andrebe, O Apsimon, R Apsimon, A-M Bachmann, Ma Baistrukov, P Blanchard, F Braunmüller, Pn Burrows, B Buttenschön, A Caldwell, J Chappell, E Chevallay, M Chung, Da Cooke, H Damerau, C Davut, G Demeter, Hl Deubner, S Doebert, J Farmer, A Fasoli

Abstract:

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 [≥(4.1±0.4)  MV/m], the phase of the modulation along the bunch is reproducible from event to event, with 3%-7% (of 2π) rms variations all along the bunch. The phase is not reproducible for lower initial amplitudes. We observe the transition between these two regimes. Phase reproducibility is essential for deterministic external injection of particles to be accelerated.
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Meter-scale conditioned hydrodynamic optical-field-ionized plasma channels

SPIE, the international society for optics and photonics (2021) 1

Authors:

Simon M Hooker, Aarón Alejo, Christopher Arran, Alexander von Boetticher, Nicolas Bourgeois, Laura Corner, Linus Feder, George Hine, James A Holloway, Oscar Jakobsson, Harry Jones, Jakob Jonnerby, Howard M Milchberg, Alexander Picksley, Lewis R Reid, Aimee J Ross, Robert J Shalloo, Christopher Thornton, Roman Walczak
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EuPRAXIA Conceptual Design Report (vol 229, pg 3675, 2020)

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS Springer Science and Business Media LLC 229:1 (2021) 4285-4287

Authors:

Rw Assmann, Mk Weikum, T Akhter, D Alesini, As Alexandrova, Mp Anania, Ne Andreev, I Andriyash, M Artioli, A Aschikhin, T Audet, A Bacci, If Barna, S Bartocci, A Bayramian, A Beaton, A Beck, M Bellaveglia, A Beluze, A Bernhard, A Biagioni, S Bielawski, Fg Bisesto, A Bonatto, L Boulton

Abstract:

© 2021, EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature. Figure 20.1 was not correct in the published article. The original article has been corrected. The published apologizes for the inconvenience.
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EuPRAXIA Conceptual Design Report (vol 229, pg 3675, 2020)

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS 229:1 (2021) 4285-4287

Authors:

RW Assmann, MK Weikum, T Akhter, D Alesini, AS Alexandrova, MP Anania, NE Andreev, I Andriyash, M Artioli, A Aschikhin, T Audet, A Bacci, IF Barna, S Bartocci, A Bayramian, A Beaton, A Beck, M Bellaveglia, A Beluze, A Bernhard, A Biagioni, S Bielawski, FG Bisesto, A Bonatto, L Boulton, F Brandi, R Brinkmann, F Briquez, F Brottier, E Bruendermann, M Buescher, B Buonomo, MH Bussmann, G Bussolino, P Campana, S Cantarella, K Cassou, A Chance, M Chen, E Chiadroni, A Cianchi, F Cioeta, JA Clarke, JM Cole, G Costa, M-E Couprie, J Cowley, M Croia, B Cros, PA Crump, R D'Arcy, G Dattoli, A Del Dotto, N Delerue, M Del Franco, P Delinikolas, S De Nicola, JM Dias, D Di Giovenale, M Diomede, E Di Pasquale, G Di Pirro, G Di Raddo, U Dorda, AC Erlandson, K Ertel, A Esposito, F Falcoz, A Falone, R Fedele, A Ferran Pousa, M Ferrario, F Filippi, J Fils, G Fiore, R Fiorito, RA Fonseca, G Franzini, M Galimberti, A Gallo, TC Galvin, A Ghaith, A Ghigo, D Giove, A Giribono, LA Gizzi, FJ Gruener, AF Habib, C Haefner, T Heinemann, A Helm, B Hidding, BJ Holzer, SM Hooker, T Hosokai, M Huebner, M Ibison, S Incremona, A Irman, F Iungo, FJ Jafarinia, O Jakobsson, DA Jaroszynski, S Jaster-Merz, C Joshi, M Kaluza, M Kando, OS Karger, S Karsch, E Khazanov, D Khikhlukha, M Kirchen, G Kirwan, C Kitegi, A Knetsch, D Kocon, P Koester, OS Kononenko, G Korn, I Kostyukov, KO Kruchinin, L Labate, C Le Blanc, C Lechner, P Lee, W Leemans, A Lehrach, X Li, Y Li, V Libov, A Lifschitz, CA Lindstrom, V Litvinenko, W Lu, O Lundh, AR Maier, V Malka, GG Manahan, SPD Mangles, A Marcelli, B Marchetti, O Marcouille, A Marocchino, F Marteau, A Martinez de la Ossa, JL Martins, PD Mason, F Massimo, F Mathieu, G Maynard, Z Mazzotta, S Mironov, AY Molodozhentsev, S Morante, A Mosnier, A Mostacci, A-S Mueller, CD Murphy, Z Najmudin, PAP Nghiem, F Nguyen, P Niknejadi, A Nutter, J Osterhoff, D Oumbarek Espinos, J-L Paillard, DN Papadopoulos, B Patrizi, R Pattathil, L Pellegrino, A Petralia, V Petrillo, L Piersanti, MA Pocsai, K Poder, R Pompili, L Pribyl, D Pugacheva, BA Reagan, J Resta-Lopez, R Ricci, S Romeo, M Rossetti Conti, AR Rossi, R Rossmanith, U Rotundo, E Roussel, L Sabbatini, P Santangelo, G Sarri, L Schaper, P Scherkl, U Schramm, CB Schroeder, J Scifo, L Serafini, G Sharma, ZM Sheng, V Shpakov, CW Siders, LO Silva, T Silva, C Simon, C Simon-Boisson, U Sinha, E Sistrunk, A Specka, TM Spinka, A Stecchi, A Stella, F Stellato, MJV Streeter, A Sutherland, EN Svystun, D Symes, C Szwaj, GE Tauscher, D Terzani, G Toci, P Tomassini, R Torres, D Ullmann, C Vaccarezza, M Valleau, M Vannini, A Vannozzi, S Vescovi, JM Vieira, F Villa, C-G Wahlstrom, R Walczak, PA Walker, K Wang, A Welsch, CP Welsch, SM Weng, SM Wiggins, J Wolfenden, G Xia, M Yabashi, H Zhang, Y Zhao, J Zhu, A Zigler
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Experimental study of extended timescale dynamics of a plasma wakefield driven by a self-modulated proton bunch

Physical Review Accelerators and Beams American Physical Society 24:1 (2021) 011301

Authors:

J Chappell, E Adli, R Agnello,, Philip Burrows, Rebecca Ramjiawan, E Senes, The AWAKE Collaboration

Abstract:

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. In simulation, resonant excitation of the wakefield causes plasma electron trajectory crossing, resulting in the development of a potential outside the plasma boundary as electrons are transversely ejected. Trends consistent with the presence of this potential are experimentally measured and their dependence on wakefield amplitude are studied via seed laser timing scans and electron injection delay scans.
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