1 m vacuum monochromator

Rapid data collection, simplified spectral analysis and built-in calibration port are some of the features of the newest McPherson 1 m monochromator, Model 225. This instrument resolves 0.01 nm and is a useful tool in experimental physics of high-temperature plasma and highly charged ions (electron beam ion trap experiments, for example). Benefits include interchangeable triple-grating turrets, dual entrance and exit port configurations, and readily available diffraction gratings for the 30 to 1000 nm wavelength region. The Model 225 has clean stainless-steel vacuum construction with minimal Viton o-ring seals to pump easily to the 10⁻⁸ torr region. Multiple port configurations make it easy to mount high-sensitivity fast detectors like channel-electron-multipliers or photomultipliers. It is also easy to mount slower CCD detectors. A unique McPherson focal plane tip/tilt drive augments direct detection CCDs. This allows optimizing focus across the entire detector regardless of the wavelength selected.

Figure 1 The new McPherson 1 m monochromator, Model 225.

The McPherson Model 225 is readily available. Some options to your instrument build include ultra-high-vacuum (UHV) compatibility to 10⁻¹⁰ torr. We can also produce units with longer focal lengths, up to 6.65 m, for high-resolution applications.