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DTSTAMP:20230831T095746Z
LOCATION:Davos
DTSTART;TZID=Europe/Stockholm:20230627T101000
DTEND;TZID=Europe/Stockholm:20230627T101200
UID:submissions.pasc-conference.org_PASC23_sess110_pos149@linklings.com
SUMMARY:P40 - Modeling a Novel Laser-Driven Electron Acceleration Scheme: 
 Particle-In-Cell Simulations at the Exascale
DESCRIPTION:Poster\n\nLuca Fedeli (CEA), Axel Huebl (Lawrence Berkeley Nat
 ional Laboratory), France Boillod-Cerneux and Thomas Clark (CEA), Kevin Go
 tt (Lawrence Berkeley National Laboratory), Conrad Hillairet (Arm), Stepha
 n Jaure (Atos), Adrien Leblanc (ENSTA), Rémi Lehe and Andrew Myers (Lawren
 ce Berkeley National Laboratory), Christelle Piechurski (GENCI), Mitsuhisa
  Sato (RIKEN), Neil Zaim (CEA), Weiqun Zhang and Jean-Luc Vay (Lawrence Be
 rkeley National Laboratory), and Henri Vincenti (CEA)\n\nIntense femtoseco
 nd lasers focused on low-density gas jets can accelerate ultra-short elect
 ron bunches up to very high energies (from hundreds of MeV to several GeV)
  over a few millimeters or a few centimeters. However, conventional laser-
 driven electron acceleration schemes do not provide enough charge for most
  of the foreseen applications. To address this issue, we have devised a no
 vel scheme consisting of a gas jet coupled to a solid target to accelerate
  substantially more charge. In 2022 we validated this concept with proof-o
 f-principle experiments at the LOA laser facility (France), and with a lar
 ge-scale Particle-In-Cell simulation campaign, carried out with the open-s
 ource WarpX code. Performing such simulations requires the use of the most
  powerful supercomputers in the world, as well as advanced numerical techn
 iques such as mesh refinement, which is very challenging to implement in a
 n electromagnetic Particle-In-Cell code, and indeed unique to the WarpX co
 de. A work describing the technical challenges that we addressed to make t
 hese simulations possible was awarded the Gordon Bell prize in 2022. In th
 is contribution, we will also discuss the performance portability of the W
 arpX code by presenting scaling tests on Frontier, Fugaku, Summit, and Per
 lmutter supercomputers.\n\nSession Chair: Jibonananda Sanyal (National Ren
 ewable Energy Laboratory)
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