Author: Bonatto, A.
Paper Title Page
MOPAB171 Numerical Simulation on Plasma-Based Beam Dumps Using Smilei 582
 
  • S. Kumar, C. Davut, G.X. Xia
    UMAN, Manchester, United Kingdom
  • A. Bonatto, C. Davut, L. Liang
    The University of Manchester, Manchester, United Kingdom
  • A. Bonatto
    Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil
  • B.S. Nunes
    IF-UFRGS, Porto Alegre, Brazil
  • R.P. Nunes
    UFRGS, Porto Alegre, Brazil
 
  The active plasma beam dump utilizes a laser to generate a plasma wakefield and decelerate an externally injected beam to low energy. We use the particle-in-cell code "Smi-lei" for the investigation of electron beam energy loss in plasma. In this research work, we optimize the laser and plasma parameters to investigate the active plasma beam dump scheme. In doing so, most of the beam energy will be deposited in the plasma. The optimization strategy for the beam energy loss in plasma is presented.
*A. Bonatto, C. B. Schroeder et al., Physics of Plasmas 22 (8) 083106 (2015).
*G. Xia, A. Bonatto et al., Instruments 4 (2) 10 (2020).
*A Bonatto et al., J. Phys.: Conf. Ser. 1596 012058, 2020.
 
poster icon Poster MOPAB171 [0.756 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB171  
About • paper received ※ 15 May 2021       paper accepted ※ 24 May 2021       issue date ※ 26 August 2021  
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TUPAB141 On the Development of a Low Peak-Power, High Repetition-Rate Laser Plasma Accelerator at IPEN 1713
 
  • A. Bonatto
    Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil
  • E.P. Maldonado
    ITA, São José dos Campos, Brazil
  • R.P. Nunes
    UFRGS, Porto Alegre, Brazil
  • R.E. Samad, F.B.D. Tabacow, N.D. Vieira, A.V.F. Zuffi
    IPEN-CNEN/SP, São Paulo, Brazil
 
  Funding: FAPESP (Grant #2018/25961), CNPq and CAPES.
In this work, the current status on the development of a laser plasma accelerator at the Nuclear and Energy Research Institute (Instituto de Pesquisas Nucleares e Energéticas, IPEN/CNEN), in São Paulo, Brazil, is presented. Short pulses to be produced by an under-development near-TW, kHz laser system will be used to ionize a gas jet, with a density profile designed to optimize the self-injection of plasma electrons. The same laser pulse will also drive a plasma wakefield, which will allow for electron acceleration in the self-modulated regime. The current milestone is to develop the experimental setup, including electron beam and plasma diagnostics, required to produce electron bunches with energies of a few MeV. Once this has been achieved, the next milestone is to produce beams with energies higher than 50 MeV. Besides kickstarting the laser wakefield accelerator (LWFA) technology in Brazil, this project aims to pave the way for conducting research on the production of radioisotopes by photonuclear reactions, triggered by LWFA-accelerated beams.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB141  
About • paper received ※ 18 May 2021       paper accepted ※ 15 June 2021       issue date ※ 10 August 2021  
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TUPAB142 Simulation Study of Laser Wakefield Acceleration Varying the Down-Ramp Length of a Gas Jet 1717
 
  • R.P. Nunes
    UFRGS, Porto Alegre, Brazil
  • A. Bonatto
    Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil
  • E.P. Maldonado
    ITA, São José dos Campos, Brazil
  • R.E. Samad, N.D. Vieira
    IPEN-CNEN/SP, São Paulo, Brazil
 
  In this work, particle-in-cell simulations were carried out to investigate the role of the down-ramp length of a H\textsubscript{2} gas jet in accelerating electrons ionized by the laser pulse. The laser and plasma density were chosen so that the system is operating in the self-modulated regime. Preliminary results show how the down-ramp length can control the injection of electrons in the first bubble induced in the plasma by the laser pulse.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB142  
About • paper received ※ 20 May 2021       paper accepted ※ 15 June 2021       issue date ※ 13 August 2021  
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TUPAB143 Laser Pulse Dynamics in the Self-Modulated Regime 1721
 
  • R.P. Nunes
    UFRGS, Porto Alegre, Brazil
  • A. Bonatto
    Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil
  • E.P. Maldonado
    ITA, São José dos Campos, Brazil
  • R.E. Samad, N.D. Vieira
    IPEN-CNEN/SP, São Paulo, Brazil
 
  In this work, particle-in-cell simulations were carried out to investigate the dynamics of a laser pulse propagating along a H2 gas jet. The laser-driven wakefield and the density of ionized electrons are analyzed during the pulse propagation through the gas jet. The laser and plasma quantities were chosen in order to have the system operating in the self-modulated regime. Results show how the self-modulation fragments the laser pulse, originating higher-amplitude pulses that can induce bubble formation with wave-breaking and particle injection.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB143  
About • paper received ※ 19 May 2021       paper accepted ※ 14 June 2021       issue date ※ 21 August 2021  
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WEPAB174 Study of the Electron Seeded Proton Self-Modulation Using FBPIC 3008
 
  • L. Liang, G.X. Xia
    The University of Manchester, Manchester, United Kingdom
  • A. Bonatto
    Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil
  • L. Liang, G.X. Xia
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
 
  Funding: This work is supported by the Cockcroft Institute Core Grant and the STFC AWAKE Run 2 grant ST/T001917/1
In order to make a full use of the whole proton bunch to drive large amplitude plasma wakefields and suppress the uncontrolled growth of any possible instabilities at the head of the proton bunch, the AWAKE Run 2 experiment plans to use an electron bunch to seed the formation of the proton bunch self-modulation. Additionally, a density step in the plasma channel will be used to freeze the selfmodulation process to keep the wakefield amplitude. In this work, numerical simulations performed with FBPIC are used to investigate the electron seeded proton self-modulation and the effect of the plasma density step as well.
 
poster icon Poster WEPAB174 [1.751 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB174  
About • paper received ※ 10 May 2021       paper accepted ※ 28 June 2021       issue date ※ 24 August 2021  
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