slactrac.BeamParams¶

class slactrac.BeamParams(beta=None, alpha=None, emit=None, emit_n=None, gamma_en=None, spotsize=None, divergence=None, r=None, avg_xxp=None)[source]¶

Calculates Courant-Snyder parameters and beam properties in a self-consistent manner.

Parameters:

Parameters:	beta : float Beta function value in meters. alpha : float Alpha function value. emit : float Emittance in SI units. emit_n : float Normalized emittance in SI units. gamma_en : float Relativistic gamma $\gamma$ spotsize : float RMS of $x$ coordinate. divergence : float RMS of $x'$ coordinate. r : float The average correlation of $x$ and $x'$ . avg_xxp : float The average correlation of $x$ and $x'$ .

beta : float

Beta function value in meters.

alpha : float

Alpha function value.

emit : float

Emittance in SI units.

emit_n : float

Normalized emittance in SI units.

gamma_en : float

Relativistic gamma $\gamma$

spotsize : float

RMS of $x$ coordinate.

divergence : float

RMS of $x'$ coordinate.

r : float

The average correlation of $x$ and $x'$ .

avg_xxp : float

The average correlation of $x$ and $x'$ .

Attributes

`T`	The beam T matrix.
`alpha`	The alpha function of the beam.
`avg_xxp`	The average of coordinates $x$ and $x'$ .
`beta`	The beta function of the beam.
`betastar`	The minimum beta function of the beam in vacuum.
`divergence`	The divergence of the beam.
`gamma`	The gamma function of the beam
`minspotsize`	The RMS size of the beam at its smallest in vacuum.
`spotsize`	The RMS size of the beam.
`sstar`	The distance from the minimum beta function of the beam in vacuum.

Methods

`set_emit_n`(emit_n, gamma)	Set the normalized emittance of the beam.
`transport`(R)	Given a transport matrix R, return the new beam parameters.

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