Cascade input

In this page, we will not go into detail what the cascade does. That can be found in the gateau paper. However, we will focus on how to supply cascades to gateau.

As a list

The most straightforward way is to directly supply a list with each cascade stage dictionary as element. This can be passed to the cascade_list argument of the simulator.initialise method.

As a YAML file

It is possible to supply the cascade as a yaml file. In this case, the cascade_list argument must be a string pointing to the folder containing the yaml. Also, the name of the yaml must be passed to the cascade_yaml argument of the simulator.initialise method.

Special options

It is possible to let a stage parasitically couple to the Ohmic losses of an aluminum reflector. For this, fill the "eta_coup" field with: "Ohmic-Al". Similarly, if a stage should couple parasitically to the atmosphere, set the "T_parastic" field to "atmosphere".

Frequency-dependent efficiency terms

In order to have a stage contain a frequency-dependent efficiency term, the "eta_coup" field should be filled with a 2-tuple, containing an array with efficiency terms as the first element, and an array containing frequencies on which the terms are defined as a second element. gateau will then internally apply a linear interpolation to the efficiency terms on the source frequencies. In this way it is possible to define stages that were measured on different frequency grids and include them in gateau.