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Diffstat (limited to 'Docs/source/usage/parameters.rst')
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diff --git a/Docs/source/usage/parameters.rst b/Docs/source/usage/parameters.rst index 4d9dfac2b..80e012c5d 100644 --- a/Docs/source/usage/parameters.rst +++ b/Docs/source/usage/parameters.rst @@ -1315,6 +1315,14 @@ Numerics and algorithms ``amr.max_level = 1``. More information can be found at https://ieeexplore.ieee.org/document/8659392. +* ``warpx.do_multi_J`` (`0` or `1`; default: `0`) + Whether to use the multi-J algorithm, where current deposition and field update are performed multiple times within each time step. The number of sub-steps is determined by the input parameter ``warpx.do_multi_J_n_depositions``. Unlike sub-cycling, field gathering is performed only once per time step, as in regular PIC cycles. For simulations with strong numerical Cherenkov instability (NCI), it is recommended to use the multi-J algorithm in combination with ``psatd.do_time_averaging = 1``. + +* ``warpx.do_multi_J_n_depositions`` (integer) + Number of sub-steps to use with the multi-J algorithm, when ``warpx.do_multi_J = 1``. + Note that this input parameter is not optional and must always be set in all input files where ``warpx.do_multi_J = 1``. No default value is provided automatically. + + * ``psatd.nox``, ``psatd.noy``, ``pstad.noz`` (`integer`) optional (default `16` for all) The order of accuracy of the spatial derivatives, when using the code compiled with a PSATD solver. If ``psatd.periodic_single_box_fft`` is used, these can be set to ``inf`` for infinite-order PSATD. @@ -1450,6 +1458,9 @@ Numerics and algorithms * ``psatd.do_time_averaging`` (`0` or `1`; default: 0) Whether to use an averaged Galilean PSATD algorithm or standard Galilean PSATD. +* ``psatd.J_linear_in_time`` (`0` or `1`; default: `0`) + Whether to perform linear interpolation of two distinct currents deposited at the beginning and the end of the time step (``psatd.J_linear_in_time = 1``), instead of using one single current deposited at half time (``psatd.J_linear_in_time = 0``), for the field update in Fourier space. Currently requires ``psatd.update_with_rho = 1``, ``warpx.do_dive_cleaning = 1``, and ``warpx.do_divb_cleaning = 1``. + * ``warpx.override_sync_intervals`` (`string`) optional (default `1`) Using the `Intervals parser`_ syntax, this string defines the timesteps at which synchronization of sources (`rho` and `J`) and fields (`E` and `B`) on grid nodes at box |