[ Identification | Description | Examples | Input parameters | Links ]

The `SOLEIL_SIRIUS` Instrument

SOLEIL SIRIUS beamline: Soft Interfaces and Resonant Investigation on Undulator Source

Identification

Site: SOLEIL
Author: FARHI Emmanuel
Origin: SOLEIL
Date: September 2026

Description

SIRIUS is designed for Soft Matter research (1.4 - 13 keV).
It features vertical focusing primary mirrors, a fixed-exit Si(111)
monochromator, and a deflection mirror to enable grazing incidence
measurements on liquid/solid interfaces.

Position | Element
---------|-------------------------------------------------------------
0        | Source: Undulator (U26)
14       | M1: Primary Mirror (Pd coated, vertical focusing)
16       | MDC1: 1st Crystal (Flat, Si 111)
16.01    | MDC2: 2nd Crystal (Sagittally bent, Si 111)
18       | Deflection Mirror (for grazing incidence)
30       | Sample Stage (XAS configuration)
35       | Sample Stage (SEXAFS configuration)

Examples

(Test cases in bold)

Test: E0=8 Detector: def_loc_I=2.14522e+10

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
E0	keV	Central energy (1.4 - 13 keV)	8
dE	keV	Energy spread	0.1
M1_angle	mrad	Incidence angle of M1	3
M2_angle	mrad	Incidence angle of M2	3
def_angle	mrad	Deflection mirror tilt (for grazing incidence)	2.0
sample_pos	m	Distance to sample (30 for XAS, 35 for SEXAFS)	30
sample	str	Sample structure file	"LaB6.cif"

The SOLEIL_SIRIUS Instrument

Identification

Description

Examples

Input parameters

Links

The `SOLEIL_SIRIUS` Instrument