slactrac.PWFA.EllipseBeam¶

class slactrac.PWFA.EllipseBeam(nb0, E=20.35, dE=0.01, sx=None, sxp=None, sxxp=None, beta=None, alpha=None, emit=None, emit_n=None)[source]¶

Creates an ellipsoidal beam.

Either the set of parameters sx, sxp, and sxxp must be used; or beta, alpha, and emit or emit_n must be used.

Parameters:

Parameters:	nb0 : float On-axis beam density. E : float Beam energy in GeV. dE : float Beam energy spread. sx : float, optional Beam moment where $\text{sx}^2 = \langle x^2 \rangle$ . sxp : float, optional Beam moment where $\text{sxp}^2 = \langle x'^2 \rangle$ . sxxp : float, optional Beam moment where $\text{sxxp} = \langle x x' \rangle$ . beta : float, optional Courant-Snyder parameter $\beta$ . alpha : float, optional Courant-Snyder parameter $\alpha$ . emit : float, optional Beam emittance $\epsilon$ . emit_n : float, optional Normalized beam emittance $\gamma \epsilon$ .

nb0 : float

On-axis beam density.

E : float

Beam energy in GeV.

dE : float

Beam energy spread.

sx : float, optional

Beam moment where $\text{sx}^2 = \langle x^2 \rangle$ .

sxp : float, optional

Beam moment where $\text{sxp}^2 = \langle x'^2 \rangle$ .

sxxp : float, optional

Beam moment where $\text{sxxp} = \langle x x' \rangle$ .

beta : float, optional

Courant-Snyder parameter $\beta$ .

alpha : float, optional

Courant-Snyder parameter $\alpha$ .

emit : float, optional

Beam emittance $\epsilon$ .

emit_n : float, optional

Normalized beam emittance $\gamma \epsilon$ .

Attributes

`E`	Beam energy in GeV.
`alpha`	Courant-Snyder parameter $\alpha$ .
`beta`	Courant-Snyder parameter $\beta$ .
`dE`	Beam energy spread.
`emit`	Beam emittance $\epsilon$ .
`emit_n`	Normalized beam emittance $\gamma \epsilon$ .
`nb0`	On-axis beam density.
`sx`	Beam moment where $\text{sx}^2 = \langle x^2 \rangle$ .
`sxp`	Beam moment where $\text{sxp}^2 = \langle x'^2 \rangle$ .
`sxxp`	Beam moment where $\text{sxxp} = \langle x x' \rangle$ .

Methods

`set_Courant_Snyder`(beta, alpha[, emit, emit_n])	Sets the beam moments indirectly using Courant-Snyder parameters.
`set_moments`(sx, sxp, sxxp)	Sets the beam moments directly.

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