Speaker
Description
Plasma channels formed by hydrodynamic expansion of optical field-ionized (HOFI) plasmas evolve on timescales that are computationally expensive to model using fully kinetic Particle-In-Cell simulation. Predictive modeling of HOFI plasma channels requires multi-species, multi-temperature compressible hydrodynamics with self-consistent ionization, recombination, and collisional energy exchange between electrons and heavy particles, as well as coupling to particle-in-cell codes used downstream for wakefield modeling.
In this talk, we present the Castro-based Hofi Expansion with QUasineutral Plasma (CHEQUP), an open-source plasma-hydrodynamics framework built on the AMReX-based Castro code. CHEQUP solves the two-temperature compressible equations for a partially-ionized, multi-species plasma with independently evolving electron and heavy-particle temperatures, following the same set of equations as [1]. Simulations are supported in 1D/2D/3D Cartesian and cylindrical geometries with full adaptive mesh refinement. The framework is interoperable with other open-source tools (e.g., via the openPMD standard), including the LASY laser propagation library and the WarpX, FBPIC and HiPACE++ particle-in-cell codes. Examples of modeling HOFI plasma channel formation for relevant experimental parameters using CHEQUP will be presented.
This research was supported by the U.S. DOE, Office of Science, Office of High Energy Physics under Contract No. DE-AC02-05CH11231, and funds from the UC Multi-Campus Research Programs and Initiatives of the University of California, Grant Number M23PR5854.
[1] Mewes et al., “Demonstration of tunability of HOFI waveguides via start-to-end simulations”, Phys. Rev. Research 5, 033112 (2023)
| Working group | WG1 |
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