</span>frac {partial B_x}` {<span class="math">\partial `y} = :nbsphinx-math:</span>displaystyle <cite>:nbsphinx-math:</cite>frac {partial B_y}` {<span class="math">\partial `x }$ is the magnetic field gradient, and :math:`k_x = k_q, k_y = -k_q.</span></p>
<div class="math notranslate nohighlight">
\[k_q = \left (\frac {eG} {m_ec \beta \gamma} \right) = \left (\frac {eG} {\beta \gamma \cdot 0.511 \cdot 10 ^ 6 e \cdot \mathrm {volt} / c} \right) =
\left (\frac {cG} {\beta \gamma \cdot 0.511 \cdot 10 ^ 6 \cdo