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The novel monochromator housing for a Johansson bent monochromator crystal is a fully shielded three-axis Eulerian cradle upon an xy-translation unit. Telescopic beam guides with movable suspensions yield radiation-save connections to the X-ray source, the monitor and the diffractometer. Micrometer screws with scales control the translations and two of the Eulerian angles, χ, φ, the third, ω, is remotely controlled. For radiation-save adjustment, the Ge 111 reflection may be observed on a removable fluorescent-screen insert behind a glass window, which makes it easy to check the reproducible adjustment at any time

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