ESRF KB systems

KB systems are commercialised by IRELEC under ESRF licence.
The system consists in a compact assembly including two bendable mirrors in Kirkpatrick-Baez configuration with proper linear and angular adjustment stages (tilt and translation perpendicular to beam propagation).
The system is specially dedicated for integration close to the end station. 3D modelling is available for integration in the sample area.
Flat silicon mirrors can be contoured from rectangular to trapezoidal or torpedo shape, in order to accurately fit with the optical requirements of the beamline.
Thanks to the high optical quality of the bent mirrors, this KB system gives access to sub-micron spot size.
The whole system is fully characterised before delivery, using the ESRF Long Trace Profiler, under supervision of the ESRF optic group.

Design features

Mechanics

The bending system is a two rotational-axis bending device. The bender body consists in a monolithic structure using flexural hinges, obtained by wire-electric discharge machining.
This design was developed to minimise the unintended forces which may be created while bending X-ray mirrors.
The linear and angular adjustments are obtained by combining two rotational stages, in order to preserve compactness and angular stability.
Bending moments and mirrors adjustments are sensitively and reliably actuated by microjacks and flexure pivots.

Mirrors

IRELEC integrates high quality X-ray coated mirrors with a state-of-the-art roughness and flatness for the initial shape (typically 0.5 µrad rms tangential slope error).
A variable range of radius of curvature from 50 km down to 50 m is achievable, for both deflecting mirrors.

Assembly

The assembling and control procedures ensure a perfect mastery of the mirrors location, and curvature on the whole optical area. The mirrors incidence and orthogonality is accurately adjusted using optical methods. The LTP final qualification allows to generate a calibration table for a proper use of the KB system on-site.

Options

We can optionally propose :
- A vacuum-tight box (compatibility down to 10-6 mbar).
- A high stability adaptation of the KB system with INVAR mechanics.
- A supporting structure and/or study of the KB system integration in the experimental area.

KB system for microfocusing
Questionnaire for definition (to download)