`wtf` section

wtf stands for what to fit. This section parametrizes the failed cavities, as well as how they are fixed.

Entry	Type	Description	Allowed values	Mandatory?
`optimisation_algorithm`	str	Name of optimisation algorithm	Keys of `ALGORITHM_SELECTOR`	✅
`strategy`	str	How compensating cavities are selected	Keys of `COMPENSATING_SELECTOR`	✅
`id_nature`	str	Indicates if failed is element index/cavity index/name	`element` or `cavity` or `name`	✅
`failed`	list[list[int]] \| list[list[str]]	Index of failed cavities		✅
`objective_preset`	str	Objectives for the optimisation algorithm	Keys of `OBJECTIVE_PRESETS`	✅
`optimisation_algorithm_kwargs`	dict	Keyword arguments passed to the actual optimisation method		❌

Each strategy entry requires specific additional arguments. As an example, with the k out of n method, you need to give LightWin k, the number of compensating cavities per failed cavity. The specific documentation can be found in failures.strategy.

You can type the index of failed cavities on several lines if you want to study several fault scenarios at once.

Example

# Indexes are cavity indexes
idx = "cavity"
failed = [
   [0, 1],       # First simulation first cryomodule is down
   [0],          # Second simulation only first cavity is down
   [1, 45]       # Third simulation second and 46th cavity are down
]

wtf section

`wtf` section