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OP-XCT Monochromator

Photonics.com
Jul 2014
McPhersonRequest Info
 
CHELMSFORD, Mass., July 8, 2014 — The conical-diffraction off-plane x-ray Czerny-Turner (OP-XCT) monochromator from McPherson is used for laser-generated high-harmonic experiments.

Designed for operation from 8 to 125 nm (10 to 150 eV), the OP-XCT operates as a monochromator or imaging spectrograph. With a coarse diffraction grating and CCD, it surveys broad extreme UV wavelength swaths, dispersing from 10 to 140 nm on a detector 12 mm wide. With a 50 µm source and a CCD detector, the 800 mm focal length resolving power is better than 300 at 25.6 nm (48 eV).

Available in high-vacuum or ultra-high vacuum versions, the OP-XCT is a tool for photoemission spectroscopy and pump probe angle resolve photoemission spectroscopy.


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GLOSSARY
diffraction grating
A glass substrate carrying a layer of deposited aluminum that has been pressure-ruled with a large number of fine equidistant grooves, using a diamond edge as a tool. Light falling on such a grating is dispersed into a series of spectra on both sides of the incident beam, the angular dispersion being inversely proportional to the line spacing. By proper shaping of the diamond edge, however, the grooves can be formed in such a way as to concentrate most of the energy into a single spectral...
monochromator
Also known as monochromatic illuminator. An instrument for isolating narrow portions of the spectrum. The spectrum of any light source is formed by a prism or grating, and an exit slit placed in the spectrum selects a narrow band of wavelengths for emission. By moving the spectrum of a source internally past the slit, the color of the emitted light can be varied at will. As most monochromators emit several percentages of unwanted light -- either white or of the wrong wavelength -- along with...
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