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ax3l committed Feb 7, 2025
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1 change: 1 addition & 0 deletions docs/source/usage/examples.rst
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:maxdepth: 1

examples/fodo_channel/README.rst
examples/fodo_channel_restart/README.rst


Lattice Design & Optimization
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17 changes: 4 additions & 13 deletions examples/fodo_channel_restart/README.rst
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.. _examples-fodo-channel:
.. _examples-fodo-channel-restart:

FODO Channel
============
FODO Channel Restart
====================

A 300m channel of 100 stable FODO cells (3m each) with a zero-current phase advance of 67.8 degrees.

The matched Twiss parameters at entry are:

* :math:`\beta_\mathrm{x} = 2.82161941` m
* :math:`\alpha_\mathrm{x} = -1.59050035`
* :math:`\beta_\mathrm{y} = 2.82161941` m
* :math:`\alpha_\mathrm{y} = 1.59050035`

We use a 2 GeV electron beam with initial unnormalized rms emittance of 2 nm.
This example takes the last output of the :ref:`FODO Channel <examples-fodo-channel>` example, loads the beam back into a new simulation and continues the simulation for another 100 FODO periods.

The second moments of the particle distribution after the FODO cell should coincide with the second moments of the particle distribution before the FODO cell, to within the level expected due to noise due to statistical sampling.

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