TWCavity not working

[cr-xu]

There is an error when trying to create a TWCavity object simply by calling e.g. cavity=ocelot.TWCavity(l=0.1). This is still the case in the master and dev branch.

It seems that the TWCavityTM was never updated to the newer convention as other elements.

Error:

File ".../ocelot/ocelot/cpbd/transformations/transformation.py", line 108, in create
    return cls(create_tm_param_func=tm_params_func, delta_e_func=delta_e_func, tm_type=tm_type, length=length, delta_length=delta_length, **params)
TypeError: TWCavityTM.__init__() got an unexpected keyword argument 'create_tm_param_func'

[sergey-tomin]

Hi,

This element is not operational yet. I haven’t had the time to reimplement it, and since we use standing wave cavities, its priority has been lower.

Another reason for the delay is that I had hoped we could use a single cavity transfer map for both types of cavities. However, it seems the situation is a bit more complicated than initially anticipated.

Cheers,
Sergey.