First Results from the New Varied Line Spacing Plane Grating Monochromator at SRC
- Synchrotron Radiation Center, University of Wisconsin -Madison, 3731 Schneider Drive, Stoughton, WI 53589 (United States)
A varied line spacing plane grating monochromator (VLS-PGM) has recently been installed and commissioned on an existing insertion device at the Synchrotron Radiation Center (SRC). The beamline covers the energy range from 70 to 2000 eV and consists of an ellipsoidal mirror, three varied line spacing gratings, an exit slit, and an ellipsoidal refocusing mirror. The beamline is optimized for X-ray PhotoElectron Emission spectroMicroscopy (X-PEEM) experiments by providing high flux density at the sample with moderate energy resolution. The insertion device functions as an undulator up to about 420 eV and as a wiggler at higher energies. Wiggler mode is obtained by positioning the undulator at maximum k, using a large horizontal aperture at the front of the beamline, and tapering the undulator by increasing the upstream gap 100 microns. Experimental results show the beamline is performing very well, with resolution and flux measurements in close agreement with theory.
- OSTI ID:
- 21052601
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 879; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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