Liquid nitrogen-cooled monochromators at SSRL have two permanently installed crystal sets each which users can request. The distribution of monochromator crystals has been planned such that most crystal cuts currently available in water-cooled monochromators will be available on one or another beam line in a LN2-cooled monochromator. Users cannot request crystals for LN2-cooled monochromators that are not one of the two options already installed and should consider crystal availablity in their beam line choices on beam time requests.
Available crystal sets in LN2-cooled monochromators at SSRL: