Highly polished, grazing incidence mirrors developed for synchrotron radiation beam lines at Stanford Synchrotron Radiation Laboratory

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Opt. Eng.; (United States)

DOI:https://doi.org/10.1117/12.7976797· OSTI ID:6257049

Tirsell, K G; Berglin, E J; Fuchs, B A; Holdener, F R; Humpal, H H; Karpenko, V P; Kulkarni, S; Fantone, S D

New platinum-coated, vertically deflecting, grazing incidence mirrors with low surface roughness have been developed to prefocus bending magnet radiation from the Stanford Positron Electron Asymmetric Ring (SPEAR) storage ring into two Beam Line VIII grating monochromators. In our toroidal grating monochromator (TGM) branch there are two 12/sup 0/ deflecting prefocusing mirrors: a cooled chemically vapor deposited (CVD) SiC cylinder for one-to-one sagittal focusing followed by a fused-silica spheroid for tangential focusing with three-to-one demagnification. In our spherical grating branch the first mirror is a 5/sup 0/ vertically deflecting, cooled SiC toroid designed to focus tangentially on the monochromator entrance slits and sagittally on the exit slits. After the exit slits, a 4/sup 0/ deflecting fused silica mirror is used in each beam line to refocus onto the sample. For this application a cylinder of thin cross section is bent to approximate a toroid. The mirrors are now installed at the Stanford Synchrotron Radiation Laboratory, and performance measurements are planned. Qualitatively, the focus of the TGM optics at the entrance slits appears very good. In this paper the authors present mirror development highlights, including the choice of SiC for primary mirrors, the measured SiC surface roughness results, and the method developed to test the profile of the toroid during construction.

• Research Organization: Lawrence Livermore National Lab., Livermore, CA (US); Optikos Corp., Cambridge, MA (US)
• OSTI ID: 6257049
• Journal Information: Opt. Eng.; (United States), Journal Name: Opt. Eng.; (United States) Vol. 27:11; ISSN OPEGA
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200 -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
430400* -- Particle Accelerators-- Storage Rings
BEAM DYNAMICS
BREMSSTRAHLUNG
CARBIDES
CARBON COMPOUNDS
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
DEPOSITION
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
ELEMENTS
GRAZING INCIDENCE TOMOGRAPHY
MAGNETS
METALS
MIRRORS
MONOCHROMATORS
PERFORMANCE TESTING
PLATINUM
PLATINUM METALS
RADIATIONS
SILICON CARBIDES
SILICON COMPOUNDS
SPEAR
STORAGE RINGS
SURFACE COATING
SURFACE PROPERTIES
SYNCHROTRON RADIATION
TESTING
TOMOGRAPHY
TRANSITION ELEMENTS