Lorenzo Figini
10dc3ba3d0
- Documentation is not built anymore with the default `all` rule to improve portability. It must be built explicitly with `make docs`. - Font types are not specified to allow building on systems with a restricted set of fonts. - Syntax fixes in the documentation Markdown.
847 B
847 B
Implementation
index_rt
The index_rt is a unique index assigned to each combination of beam
propagation mode and number of passes into the plasma.
Initially index_rt is 1 for the ordinary mode or 2 for the extraordinary
mode. Due to the mode mixing, on subsequent passes each beam splits into two
modes and the index_rt is updated as:
index_rt = 2*index_rt + 1 ! for the O mode
index_rt = 2*index_rt + 2 ! for the X mode
It follows that ordinary(extraordinary) modes respectively have odd(even)
indices and the number of passes is given by $\lfloor \log₂(1 + \tt index_rt)
\rfloor$. For example, an index_rt=19 denotes the following chain:
\begin{aligned}
\text{mode:} && O &→ X → O → O \\
\text{\tt index\_rt:} && 1 &→ 4 → 9 → 19
\end{aligned}