Tri-crystal fixed exit monochromator

TL;DR

This paper introduces a novel tri-crystal X-ray monochromator design that maintains beam profile stability and is suitable for side beam-lines, enabling multiple tunable beam-lines from a single synchrotron source.

Contribution

It presents a new tri-crystal monochromator design that avoids beam tilt issues common in double-crystal schemes for side beam-line applications.

Findings

The new design preserves the exit beam profile.

It allows multiple tunable beam-lines from one synchrotron source.

The monochromator is suitable for side beam-line configurations.

Abstract

It is proposed a novel design of an X-ray monochromator which uses three crystals. The exit beam turns in horizontal plane on the angle $2\alpha$ with respect to the incoming beam. So, this kind of monochromator is suitable for side beam-lines; several tunable beam-lines can be built for a one fan beam of synchrotron radiation (from wiggler or bending magnet). In contrast to the double-crystal scheme of general position considered previously (which also suitable for side beam-lines), the new variant does not lead to a tilt of exit beam profile.