The `SOLEIL_SWING` Instrument

A simple model for the SWING beam-line at SOLEIL (small angle scattering, SAXS).

Identification

Site: SOLEIL
Author: E. Farhi, S. Bac
Origin: SOLEIL
Date: 2025

Description

The SWING beamline targets soft condensed matter, conformation of
macro-molecules in solution (BioSAXS) and material sciences. Our experimental
set up allows simultaneous small-angle X-ray scattering (SAXS) and wide-angle
X-ray scattering measurements (WAXS) in the 5-16 keV energy range. Anomalous
scattering experiments can also be performed. A very large variety of types of
samples can be studied, e.g., solutions, gels, amorphous solids, crystallized
solids, thanks to the diversity of the proposed sample environments.

This model may use any PDB file as sample, or an ideal sphere colloid for testing.

Position | Element
---------|--------------------------------------------------------------------
0        | U20 undulator
11.7     | Diaphragm providing HxV=1x0.5 mm beam
20       | Si(111) DCM, 40x40x10 mm^3 E0=5-16 keV
22.5     | Focusing KB (HFM + VFM)
31       | Linear H-CRL (f=81 cm): 31 m
32       | Sample location
32.5-39  | Detector 162.5 x 155.2 mm

Example: E0=13 Detector: Eiger4M_I=7.5752e+06

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
E0	keV	Nominal energy at the Wiggler.	13
dE	keV	Energy half-bandwidth at the Wiggler	0.1
dcm_theta	deg	Rotation angle of the DCM. 0=set from energy E0	0
hfm_radius	m	Horizontally focusing mirror radius.	495
vfm_radius	m	Vertically focusing mirror radius.	859
mirror_grazing_angle	deg	Tilt angle of the mirrors.	4e-3
sample	str	Sample given as a PDB file, or NULL for a 100A dilute Sphere model.	"6lyz.pdb"
sample_det	m	Sample to detector distance in m.	2

McXtrace - An X-ray ray-trace simulation package

The SOLEIL_SWING Instrument

Identification

Description

Input parameters

Links

The `SOLEIL_SWING` Instrument