The new McPherson (Chelmsford, MA) Model 248/310 spectrometer can easily make spectral measurements around 13 nanometers and throughout the extreme vacuum ultraviolet and soft x-ray wavelength region. It is ideal for work from 10eV to more than 1000eV. The spectrometer features one meter focal length optics built into a compact Rowland circle instrument. Grazing incidence angles used in the instrument deliver high reflective efficiency. For direct detection of extreme vacuum ultraviolet and soft x-ray wavelengths, windowless back illuminated CCD’s are used. Sensitivity of CCD’s at short wavelengths can surpass that in the visible spectral region. The CCD’s aggressive thermoelectric cooling also reduces readout noise. When gated detection is required, open microchannel plate intensifiers are available.

The Model 248/310 is a high vacuum instrument working at 10E-6 torr vacuum; ultra-high vacuum 10E-10 torr versions are available. Wavelength calibration sources, thin film filters, and gated microchannel plate intensifiers are also available as accessories.

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NASA Tech Briefs Magazine

This article first appeared in the July, 2013 issue of NASA Tech Briefs Magazine.

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