## Beam conditioning optics

Elliptically or parabolically bent multilayer reflectors can monochromatise a divergent X-ray and focus respectively collimate (parallelise) it at the same time. Thus a small line source can be reproduced as a line or collimated in a parallel beam with a rectangular cross section.

## Typical parameters:

Spectral lines: | Cr, Co, Cu, Ga, Mo, Ag |

Typical peak reflectivity: | R > 70% (depending on angle and energy) |

Monochromaticity: | Kα1+Kα2 or Kβ |

Divergency (parabolic optic): | typically ΔΦ < 0.03° |

(with a generator of 40µm) | |

Typical parallel beam width: | 1.0mm (Mo-K, L = 100mm) |

1.5mm (Cu-K, L = 60mm) | |

Typical focus dimension: | < 30µm ... 500µm |

Typical focal distance: | 60 - 100mm (focal point/focus to reflection centre) |

Focal distance relation: | f1:f2 ~ 1:1 .. 1:5 (elliptic reflector) |

others on request |

## 2-dimensional beam conditioning optics:

Two bent optics at right angles to one another (ASTIX geometry) make it possible to focus a dimple spring in one point (ASTIX-f) or to collimate it to a beam with a square cross section (ASTIX-c). A hybrid optic allows for a combination between focusing in one direction and collimating in the other (ASTIX-h).

## 2-dimensional elliptic optic:

Two elliptic optics which are at right angles to one another focus the divergent beam of a dimple spring in one point (ASTIX-f). Its dimension can be regulated by choosing the distance between source, reflector and focus. Typical diameters are in the range of < 30µm and 500µm.