Author: Marocchino, A.
Paper Title Page
MOPAG01 Plasma Wakefield Start to End Acceleration Simulations From Photocathode to FEL With Simulated Density Profiles 154
 
  • A. Marocchino
    INFN/LNF, Frascati (Roma), Italy
  
  Plasma Wake­field ac­cel­er­a­tion is a promis­ing new ac­cel­er­a­tion tech­nique that profit by a charged bunch, e.g. an elec­tron bunch, to break the neu­tral­ity of a plasma chan­nel to pro­duce a wake where a trail­ing bunch is even­tu­ally ac­cel­er­ated. The quest to achieve ex­treme gra­di­ent con­serv­ing high bright­ness has prompted to a va­ri­ety of new ap­proaches and tech­niques. Most of the pro­posed schemes are how­ever lim­ited to the only plasma chan­nel, as­sum­ing in the vast ma­jor­ity of cases, ideal sce­nar­ios (e.g. ideal bi-gauss­ian bunches and uni­form den­sity plasma chan­nels). Re­al­is­tic start-to-end sim­u­la­tions from the pho­to­cath­ode to a FEL via a plasma ac­cel­er­at­ing sec­tion are a fun­da­men­tal step to fur­ther in­ves­ti­gate re­al­is­tic scheme pos­si­bil­i­ties, the un­der­ly­ing physics and fu­ture ap­pli­ca­tions. To re­move ideal sim­pli­fi­ca­tions, the SPAR­C_LAB sim­u­la­tion team is sim­u­lat­ing bunches from the photo-cath­ode and track­ing them all the way to the plasma. Sim­i­larly, the den­sity pro­files, where bunches evolve and ac­cel­er­ate, are cal­cu­lated with a mag­neto-hy­dro­dy­namic code. The den­sity pro­file is im­ported into the par­ti­cle in cell codes used to cal­cu­late the par­ti­cle evo­lu­tion within the plasma sec­tion. The use of a mul­ti­tude of codes, in­volv­ing dif­fer­ent ar­chi­tec­tures, phys­i­cal units and pro­gram­ming lan­guages, made nec­es­sary the de­f­i­n­i­tion of code in­ter­fac­ing and pipe-processes to en­sure a proper pipeline of tools that are tra­di­tion­ally used in dif­fer­ent fields are do not often come across. By com­bin­ing the dif­fer­ent nu­mer­i­cal codes (par­ti­cle tracker, par­ti­cle in cell, mag­neto-hy­dro­dy­nam­ics and FEL codes) we could pro­pose a first re­al­is­tic start-to-end sim­u­la­tion from the photo-cath­ode to a FEL laser­ing for a pos­si­ble up­com­ing Ital­ian PWFA-FEL fa­cil­ity. Such a work is con­ducted with a great focus on code re­li­a­bil­ity and data re­pro­ducibil­ity. The Ital­ian PWFA ex­per­i­men­tal team uses a cap­il­lary to con­trol and tai­lor the plasma den­sity pro­file, we could per­form pre­lim­i­nary code com­par­i­son and  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICAP2018-MOPAG01  
About • paper received ※ 16 October 2018       paper accepted ※ 24 October 2018       issue date ※ 26 January 2019  
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