CERN Accelerating science

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1.
Preparation for Realisation of External Electron Injection for AWAKE Run 2b / van Gils, Nikita (CERN ; Groningen U.) ; Turner, Marlene (CERN) ; Zevi Della Porta, Giovanni (CERN ; Munich, Max Planck Inst.) ; Bencini, Vittorio (CERN ; Oxford U.) ; Ranc, Lucas (Munich, Max Planck Inst.) ; Pannell, Fern (University Coll. London) ; Gerbershagen, Alexander (Groningen U.) ; Gschwendtner, Edda (CERN)
The Advanced Wakefield Experiment (AWAKE) aimsto accelerate electrons to particle physics relevant energiesusing self-modulated proton bunches as drivers in a singleplasma. AWAKE is now in its Run 2b (2023-2024), wherethe goal is to stabilise wakefields by using a plasma density step. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) MOPR42 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPR42
2.
Seeding of proton bunch self-modulation by an electron bunch in plasma / Verra, L. (CERN ; Munich, Max Planck Inst. ; Munich, Tech. U.) ; Zevi Della Porta, G. (CERN) ; Moon, K.-J. (UNIST, Ulsan) ; Bachmann, A.-M. (Munich, Max Planck Inst.) ; Gschwendtner, E. (CERN) ; Muggli, P. (Munich, Max Planck Inst.)
The AWAKE experiment relies on the self-modulation instability of a long proton bunch to effectively drive wakefields and accelerate an electron bunch to GeV-level energies. [...]
arXiv:2106.12414.
- 4 p.
Fulltext
3.
Application of a Camera Array for the Upgrade of the AWAKE Spectrometer / Senes, Eugenio (CERN) ; Cooke, David (Royal Holloway, U. of London) ; Mazzoni, Stefano (CERN) ; Pannell, Fern (Royal Holloway, U. of London) ; Turner, Marlene (CERN) ; Wing, Matthew (Royal Holloway, U. of London) ; Zevi Della Porta, Giovanni (CERN ; Lindau, Max Planck Inst.)
The first run of the AWAKE experiment successfully demonstrated the acceleration of an electron beam in the plasma wakefields of a relativistic proton beam. The planned second run will focus on the control of the emittance  of accelerated electrons, requiring an upgrade of the  existing spectrometer. Preliminary measurements showed that this might be achieved by improving the resolution of the scintillator and with a new design of the optical system. This contribution discusses the application of a digital camera array in close proximity of the spectrometer scintillator, to enable the accelerated electron beam emittance measurement..
2023 - 5 p. - Published in : JACoW IBIC 2023 (2023) 230-234 Fulltext: PDF;
In : 12th International Beam Instrumentation Conference (IBIC 2023), Saskatoon, Canada, 10 - 14 Sep 2023, pp.230-234
4.
Fabrication and rejuvenation of high quantum efficiency caesium telluride photocathodes for high brightness and high average current photoinjectors / Martinez-Calderon, M (CERN) ; Chevallay, E (CERN) ; Rossel, R E (CERN) ; Jones, L B (Daresbury) ; Zevi Della Porta, G (CERN) ; Marsh, B (CERN) ; Granados, E (CERN)
With their high quantum efficiency (QE) and excellent photoemissive properties, cesium telluride (Cs-Te) photocathodes are the current workhorse in the high average current electron accelerators around the globe. Their ability to generate high brightness and high charge electron beams has opened the doorway to numerous applications, including fundamental particle physics research, radiation therapy, high-energy physics experiments, and high repetition rate free-electron lasers (FELs). [...]
2024 - 10 p. - Published in : Phys. Rev. Accel. Beams 27 (2024) 023401 Fulltext: PDF;
5.
Ultra fast reinforcement learning demonstrated at CERN AWAKE / Hirlaender, Simon (Salzburg U.) ; Lamminger, Lukas (Salzburg U.) ; Zevi Della Porta, Giovanni (CERN) ; Kain, Verena (CERN)
Reinforcement learning (RL) is a promising direction in machine learning for the control and optimisation of particle accelerators since it learns directly from experience without needing a model a-priori. However, RL generally suffers from low sample efficiency and thus training from scracth on the machine is often not an option. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) THPL038 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPL038
6.
Beam characterization and optimisation for AWAKE 18 MeV electron line / Bencini, V (CERN ; JAI, UK) ; Doebert, S (CERN) ; Gschwendtner, E (CERN) ; Granados, E (CERN) ; Velotti, F M (CERN) ; Verra, L (CERN) ; Zevi Della Porta, G (CERN ; Munich, Max Planck Inst.)
After the successful conclusion of Run1 in 2018, the AWAKE experiment is presently undergoing its second phase (Run2), which aims to demonstrate the possibility of producing high quality electron beams for high energy physics applications. Over the last year, a significant time-investment was made to study proton beam centroid modulation effects in plasma induced by a seeding electron bunch (i.e. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) MOPA103 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPA103
7.
Techniques to seed the self-modulation instability of a long proton bunch in plasma / Verra, Livio (CERN) ; Bergamaschi, Michele (Munich, Max Planck Inst.) ; Zevi Della Porta, Giovanni (CERN ; Munich, Max Planck Inst.) ; Gschwendtner, Edda (CERN) ; Muggli, Patric (Munich, Max Planck Inst.)
The Advanced Wakefield Experiment (AWAKE) at CERN relies on the seeded Self-Modulation (SM) of a long relativistic proton bunch in plasma to accelerate an externally injected MeV witness electron bunch to GeV energies. During AWAKE Run 1 (2016-2018) and Run 2a (2021-2022), two seeding methods were investigated experimentally: relativistic ionization front seeding and electron bunch seeding. [...]
arXiv:2305.00431.- 2023-09-26 - 4 p. - Published in : JACoW IPAC 2023 (2023) TUPA095 Fulltext: 2305.00431 - PDF; document - PDF; Publication - PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.TUPA095
8.
Recent AWAKE Diagnostics Development and Operational Results / Senes, Eugenio (CERN) ; Burger, Stephane (CERN) ; Burrows, Philip (JAI, UK ; Oxford U.) ; Cooke, David (University Coll. London) ; Krupa, Michal (CERN) ; Lefèvre, Thibaut (CERN) ; Mazzoni, Stefano (CERN) ; Pakuza, Collette (Oxford U. ; JAI, UK) ; Poimenidou, Eirini (CERN) ; Topaloudis, Athanasios (CERN) et al.
The Advanced Wakefield Experiment (AWAKE) at CERN investigates the Plasma-Wakefield acceleration of electrons driven by a relativistic proton bunch. After successfully demonstrating the acceleration process in the AWAKE Run 1, the experiment has now started the Run 2. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 343-346 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.343-346
9.
A Method for Obtaining 3D Charge Density Distribution of a Self-Modulated Proton Bunch / Nechaeva, Tatiana (Munich, Max Planck Inst. HLL) ; Muggli, Patric (Munich, Max Planck Inst. HLL) ; Verra, Livio (CERN ; Munich, Tech. U. ; Munich, Max Planck Inst. HLL) ; Zevi Della Porta, Giovanni (CERN) /AWAKE Collaboration
The Advanced Wakefield Experiment (AWAKE) at CERN is the first plasma wakefield accelerator experiment to use a proton bunch as driver. The long bunch undergoes seeded self-modulation (SSM) in a 10 m-long plasma. [...]
2022 - 3 p. - Published in : JACoW IPAC 2022 (2022) 3118-3120 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.3118-3120
10.
The AWAKE Experiment in 2021: Performance and Preliminary Results on Electron-Seeding of Self-Modulation / Gschwendtner, Edda (CERN) ; Muggli, Patric (Munich, Max Planck Inst.) ; Verra, Livio (CERN) ; Zevi Della Porta, Giovanni (CERN) /AWAKE Collaboration
The future programme of the Advanced Wakefield (AWAKE) experiment at CERN relies on the seeded self-modulation of an entire proton bunch, resulting in phase-reproducible micro-bunches. This important milestone was achieved during the 2021 proton run by injecting a short electron bunch ahead of the proton bunch, demonstrating for the first time the electron-seeding of proton bunch self-modulation [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 21-24 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.21-24

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