print

SuperADAM

CRG - Advanced Reflectometer for the Analysis of Materials

Guide hall n°2, cold guide H521

horizontal scattering geometry

0 Å-1 < Q < 2.5 Å-1

monochromator

type

HOPG (002)

GIC

(under development)

wavelength λ

5.21 Å

resolution δλ/λ

0.005

0.035

λ/2, λ/3... filter (removable)

solid state wavelength filter

cooled Be

Collimation

collimation slit distance (variable)

2.5 - 4 m

3 - 5.2m

monochromator-to-sample-distance (variable)

2.8 - 5 m

3.5 - 6 m

Sample

flux (non polarized)

6×105 n s-1 cm-2

6×106 n s-1 cm-2

(expected value)

flux (polarized)

3.2×105

 

orientation

horizontal scattering plane

Sample environment

magnetic field

up to 1.1T (optional 7T cryomagnet)

temperature

from 2K to 400K

Detectors

 

3He single detector

 

distance to sample (variable)

1.1 - 6 m

 

background (beam closed)

5 cts per minute

 

2 dim. position sensitive  3He detector

distance to sample (variable)1.3 - 6 m 

active area

30 x 30 cm2

 

efficiency

76 %

 

resolution

2.8 mm (FWHM)

 

Polarisation and polarisation analysis

polarisers

reflection supermirror

3He spin filter

efficiency

99.8%

up to 99.9% (variable)

180º spin-flippers

resonance coils

analyzer

reflection/transmition supermirros or 3He spin filter

efficiency

99.4% (99.9% with 3He spin filter)

 

Instrument description

The reflectometer SuperADAM is an angle dispersive fixed wavelength machine which offers two operation modes:

- high-resolution and high-polarization mode with a focussing pyrolytic graphite monochromator for studies of magnetic layered systems

 - high-flux low-resolution unpolarized option for soft-matter investigations (under construction).

A two dimensional position sensitive detector allows time efficient collection of off-specular data. With a maximum scattering angle of about 85° of the detector arm Q-values up to 2.1 Å-1 can be reached for complementary measurements probing small length scales. The flexibility of the instrument permits the variation of the detector to sample and sample to monochromator distances in order to accommodate the specific requirements for incident and outgoing resolutions.

Specialised sample environment can be provided including a cryo-furnace and an electromagnet or cryomagnet.