Evaluation of a new VUV/soft x-ray toroidal grating monochromator with a movable exit slit

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1143097· OSTI ID:5570119

Mancini, D C; Bissen, M; Rioux, D; Patel, R; Rogers, G; Brodsky, E L; Hoechst, H ^[1]

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1. Synchrotron Radiation Center, University of Wisconsin Madison, Stoughton, Wisconsin 53589 (United States)

The performance of a toroidal grating monochromator can be significantly improved by compensating for the wavelength dependent defocusing aberration by means of a movable exit slit. Model calculations of a movable exit slit design show a resolving power that varies nearly linearly with wavelength over the scan range. The energy resolution follows the slope between two optimized resolution minima of a fixed slit TGM. The overall improvement in resolution due to the movable slit depends critically on the figure error of the toroid surface. The Al({ital L}{sub II,III}) core edges provide a means to calibrate gratings and determine the resolution at 72.8 eV. A method is described for using the shift in core edge with exit slit position to enable final alignment of the exit slit motion providing stability of energy calibration of 2 meV over the scan range. Comparison of calculations and measured resolution suggests that slope errors remain the limiting factor in performance.

• OSTI ID: 5570119
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 63:1; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
DESIGN
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
MONOCHROMATORS
PERFORMANCE
RADIATION SOURCES
RADIATIONS
SOFT X RADIATION
SYNCHROTRON RADIATION SOURCES
ULTRAVIOLET RADIATION
X RADIATION