The SGM3 beamline on ASTRID2
Specifications of the AU-SGM3 beam line
In order to utilise the new 3rd generation light source, ASTRID2, the beam line has undergone only minor changes. The vertical focusing mirror (VFM) has been changed from a spherical to an elliptical in order to have a coma-free image of the source on the entrance slit (ENS) and the refocusing mirror after the monochromator has been changed from toroidal to ellipsoidal.
A sketch of the AU-SGM3 beam line is shown below. The source is the same U55 undulator previously used ASTRID, which has been installed in straight section 3 of the ASTRID2 ring:
A schematic diagram showing the optical layout of the AU-SGM3 beam line on ASTRID2.
| Beam line element | R / mm | Inc/grazing angle | Distance from prev./mm | Type |
|---|---|---|---|---|
| Source: Undulator | ||||
| HFM | 148000 | 4.5 | 6000 | Spherical |
| VFM | Major 13530, Minor ∞ | 7.5 | 1500 | Elliptical |
| ENS | 1000 | |||
| Gratings | 13220 | 12.5 | 1750 | Spherical |
| EXS | 3950-4350 | |||
| RFM | Major 16390, Minor 183.7 | 5 | 2500 | Ellipsoidal |
| Sample | 1000 |
You can read more about SGM3 on ASTRID here.
For further information please contact:
Beamline: Søren Vrønning Hoffmann
Last Modified 28 August 2018