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-rw-r--r--Docs/source/running_cpp/parameters.rst6
1 files changed, 3 insertions, 3 deletions
diff --git a/Docs/source/running_cpp/parameters.rst b/Docs/source/running_cpp/parameters.rst
index 946c21a9a..fc8ad59be 100644
--- a/Docs/source/running_cpp/parameters.rst
+++ b/Docs/source/running_cpp/parameters.rst
@@ -410,8 +410,8 @@ Particle initialization
temperature parameter ``<species_name>.theta`` as an input, where theta is kb*T/(m*c^2),
kb is the Boltzmann constant, c is the speed of light, and m is the mass of the species.
It also includes the optional parameter ``<species_name>.beta`` where beta is equal to v/c.
- The plasma will be initialized to move at drift velocity beta*c in the
- ``<species_name>.drift_vel_dir = (+/-) 'x', 'y', 'z'`` direction. Please leave no whitespace
+ The plasma will be initialized to move at bulk velocity beta*c in the
+ ``<species_name>.bulk_vel_dir = (+/-) 'x', 'y', 'z'`` direction. Please leave no whitespace
between the sign and the character on input. A direction without a sign will be treated as
positive. The MB distribution is initialized in the drifting frame by sampling three Gaussian
distributions in each dimension using, the Box Mueller method, and then the distribution is
@@ -427,7 +427,7 @@ Particle initialization
to kb*T/(m*c^2), where kb is the Boltzmann constant, and m is the mass of the species. It also
includes the optional parameter ``<species_name>.beta`` where beta is equal to v/c. The plasma
will be initialized to move at velocity beta*c in the
- ``<species_name>.drift_vel_dir = (+/-) 'x', 'y', 'z'`` direction. Please leave no whitespace
+ ``<species_name>.bulk_vel_dir = (+/-) 'x', 'y', 'z'`` direction. Please leave no whitespace
between the sign and the character on input. A direction without a sign will be treated as
positive. The MJ distribution will be initialized in the moving frame using the Sobol method,
and then the distribution will be transformed to the simulation frame using the flipping method.