Author: Samad, R.E.
Paper Title Page
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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