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-rw-r--r--Docs/source/usage/parameters.rst2
1 files changed, 1 insertions, 1 deletions
diff --git a/Docs/source/usage/parameters.rst b/Docs/source/usage/parameters.rst
index 58bef2f25..7dae16289 100644
--- a/Docs/source/usage/parameters.rst
+++ b/Docs/source/usage/parameters.rst
@@ -1161,7 +1161,7 @@ Laser initialization
``repeated_plasma_lens_strengths_B``, the focusing strength of each lens, an array of floats.
The applied field is uniform longitudinally (along z) with a hard edge,
where residence corrections are used for more accurate field calculation.
- The field is of the form :math:`B_x = \mathrm{strength} \cdot y` and :math:`B_y = \mathrm{strength} \cdot x`, :math`:B_z = 0`.
+ The field is of the form :math:`B_x = \mathrm{strength} \cdot y` and :math:`B_y = -\mathrm{strength} \cdot x`, :math`:B_z = 0`.
* ``particles.E_ext_particle_init_style`` (string) optional (default is "default")
This parameter determines the type of initialization for the external