Plane-grating monochromator at BESSY II using collimated light

Abstract

At the German synchrotron radiation facility BESSY II, the VUV photon energy range between 15 and 600 eV is covered by the first, third and fifth harmonics of the U125 undulator. The beamline connected to this source is a plane-grating monochromator (PGM) with a variable deviation angle. The plane grating is illuminated by collimated radiation, allowing very flexible use of the monochromator. Depending on users' demands, it can be operated at high spectral resolution, high-order suppression or in high-flux mode, simply by software control.

In Situ XANES/XPS Investigation of Doped Manganese Perovskite Catalysts

“…The scan rate was 0.5 eV/s in continuous driving mode of the plane-grating monochromator. The fixed-focus constant was set to c ff = 2.25 and the exit slit to 60 µm [37]. The presented spectra have been measured in total electron yield mode (TEY).…”

UE112_PGM-1: An open-port low-energy beamline at the BESSY II undulator UE112

“…The optical layout of the beamline (all values in the subsequent schema are design parameters, dimensions given in mm) (Follath et al, 1997(Follath et al, , 1998(Follath et al, , 2001) is described in the following. M1 is a toroidal mirror which collimates the light in the horizontal and vertical directions.…”

“…It is a combination of the UE112, a modern APPLE-II-type undulator, coupled to a collimated plane-grating monochromator (Follath et al, 1997(Follath et al, , 1998(Follath et al, , 2001). It features high resolving power, high throughput and small spot size at the experiment for X-ray energies between 17 eV and 690 eV.…”

A plane-grating monochromator for circularly polarized undulator radiation at BESSY II

“…in circular dichroism, are investigated. As in other PGMs at BESSY II (Follath et al, 1998), the grating works in collimated light in the dispersion plane (Hunter et al, 1982), which is provided by M1. This enables the monochromator to be operated in either the higher-order suppression mode or the high-energy resolution mode without rearranging slit or optical elements in the beamline.…”