[ Identification | Description | Input parameters | Links ]

The `Undulator` Component

Model of an undulator source

Identification

Site:
Author: Erik B. Knudsen
Origin: DTU Physics
Date: May, 2013.

Description

A undulator source model based on the derivation by K.J. Kim, AIP, conf. proc., 184, 1989. doi:10.1063/1.38046.

SOLEIL_PX2a U24
Example: Undulator( E0=12.65, dE=1, Ee=2.75, dEe=0.001, Ie=0.5, K=1.788, Nper=80,
lu=24e-3, sigey=9.3e-6, sigex=215.7e-6, sigepx=29.3e-6, sigepy=4.2e-6,
dist=29.5, E1st=12.400 )

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
E0	keV	Center of emitted energy spectrum.	0
dE	keV	Half-width of emitted energy spectrum.	0
phase		Initial phase of radiation.	0
randomphase		If !=0 phase will be random (I.e. the emitted radiation is completely incoherent).	1
Ee	GeV	Storage ring electron energy [typically a few GeV).	2.4
dEe		Relative electron energy beam spread (sigma/Ee).	0
Ie	A	Ring current.	0.4
B	T	Peak magnet field strength. Overrides K.	0
K		Dimensionless deflection undulator parameter. When K >> 1 (ie B*lu is large) you get a wiggler.	0
Nper		Number of magnetic periods in the undulator.	1
lu	m	Magnetic period length of the undulator aka lambda_u.	16e-3
sigey	m	Electron ring beam size in vertical plane (rms).	0
sigex	m	Electron ring beam size in horizontal plane (rms).	0
sigepx	rad	Electron ring beam horizontal divergence (rms).	0
sigepy	rad	Electron ring beam vertical divergence (rms).	0
focus_xw	m	Width of target window.	0
focus_yh	m	Height of target window.	0
dist	m	Distance from source plane to target window along the optical axis.	1
quick_integ		if nonzero, use faster (but less accurate) integration scheme.	0
E1st	keV	Energy of the fundmental (1st) undulator harmonic.	0
verbose		if nonzero, output extra information.	0
Br			1.35

AT (	,	,		) RELATIVE
ROTATED (	,	,		) RELATIVE

The Undulator Component

Identification

Description

Input parameters

Links

The `Undulator` Component