Dresden 2026 – scientific programme
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 6: Plasma Accelerators, Ions II
AKBP 6.3: Talk
Tuesday, March 10, 2026, 11:45–12:00, SCH/A117
PIC simulation study of highly efficient, high proton energy laser ion acceleration from cryogenic hydrogen jet targets — •Paweł Ordyna1,2, Stefan Assenbaum1,2, Thomas Kluge1, Karl Zeil1, and Ulrich Schramm1 — 1Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Deutschland — 2Technische Universität Dresden, Dresden, Deutschland
Recent experiments on laser ion acceleration using planar cryogenic hydrogen jet targets have demonstrated high laser to proton coupling efficiency and maximum proton energies that far exceed expected scaling (over 50 MeV at 1.6 J laser energy on target).
We present an accompanying particle-in-cell simulation study that incorporates an approximately 30 ps long laser pedestal and the resulting plasma pre-expansion. Our results reproduce both a highly directional fast proton-beam as well as a return current driven, low-energy, high-charge, nearly isotropic proton emission; both features are observed experimentally. Additionally, we discuss a surprisingly strong influence of small variations in jet orientation on the emission angle of the fast protons.
Keywords: PIC; hydrogen; simulation; plasma; proton