at.lattice.crabcavity_element

Classes

CrabCavity(family_name, length, voltages, ...)

Crab cavity element

class CrabCavity(family_name, length, voltages, frequency, harmonic_number, **kwargs)

Bases: LongtMotion, LongElement

Crab cavity element

Parameters:

• family_name (str) – Name of the element

• length (float) – Element length [m]

• voltages (float) – [Horizontal voltage, Vertical voltage] [V]

• frequency (float) – RF frequency [Hz]

• harmonic_number (int)

Keyword Arguments:

• TimeLag=0 – Cavity time lag [m]

• SigPhi=0 – Phase noise [rad]

• SigVV=0 – Voltage noise [V]

Default PassMethod: CrabCavityPass

set_longt_motion(enable, new_pass=None, **kwargs)

Enable/Disable longitudinal motion

Parameters:

• enable – True: for enabling, False for disabling

• new_pass –

  New PassMethod:

  • None: makes no change,

  • 'auto': Uses the default conversion,

  • Anything else is used as the new PassMethod.

• copy – If True, returns a modified copy of the element, otherwise modifies the element in-place

default_pass = {False: 'DriftPass', True: 'CrabCavityPass'}