Application Of A Simple Rotational Spherical Grating Mounting To High Resolution Soft X-Ray Spectroscopy

The design of a new class of grazing incidence monochromator system is presented. The design uses a spherical grating in a simple rotation mounting with the non-dispersive focusing being accomplished with a separate focusing mirror. The characteristics of several configurations of the basic design are presented and the overall design procedures are discussed. The design is essentially free of aberrations and the principal degradation in resolution will be caused by tangential slope errors in the diffraction grating. The effect of the slope error on resolution is examined in detail. The design of an entrance slitless monochromator currently under construction at Daresbury is discussed.