Electron Beam Parameters

The number of macro particles per slice. NPART must be a multiple of 4*NBINS and smaller than defined in the source file 'genesis.def'.

The mean energy of the electron beam in terms of the electron rest mass energy.

The RMS value of the energy distribution in terms of electron rest mass energy.

The rms value in x of the transverse, spatial distribution.

The rms value in y of the transverse, spatial distribution.

The normalized rms emittance in x .

The normalized rms emittance in y.

Rotation of the transverse phase space distribution in x according to the standard definition ALPHAX = - < xx' > GAMMA0 / EMITX.

Rotation of the transverse phase space distribution in y. See ALPHAX for more information.

Transverse position in x of the electron beam at the undulator entrance with respect to the undulator axis.

Transverse position in y of the electron beam at the undulator entrance with respect to the undulator axis.

Average normalized transverse momentum x of the electron beam at the undulator entrance. The momenta are defined as PXBEAM = _x where _x = cv_x is the average transverse velocity and the Lorenz factor of the electron energy.

Average normalized transverse momentum in y of the electron beam at the undulator entrance. See PXBEAM for more information.

Peak current of the electron beam. Time-independent simulations enforces a constant current.

Cut in the transverse phase space in measures of the rms size to collimate transverse beam tails/halos. The cut is applied after the loading and beam current is set accordingly to the reduced number of macro particles. It is disabled if the value is negative or the electron beam is imported from an external file.

CONDITX is the correlation strength between the amplitude of the eletron's betatron oscillation and its energy. If the condition is applied correctly any emittance effects are removed from the FEL amplification and the focal strength can be increased. However it requires a conditioning beamline prior to the FEL to apply the correlation. Refer to the paper of Sessler (A.N. Sessler, et al., Phys. Rev. Lett 68 (1992) 309) for more information.

Same as CONDITX but for the correlation in the y-plane.

Initial value of the bunching factor, when quite loading is used.

Phase of initial bunching, when quite loading is used.

Initial energy modulation, when quite loading is used. The value is the modulation amplitude in terms of gamma.

Phase of initial energy modulation, when quite loading is used.