X-ray scattering apparatus , comprising: - a sample vacuum chamber ; - a sample holder placed inside the sample vacuum chamber for aligning and/or orienting a sample to be analyzed by X-ray scattering; - an X-ray beam delivery system comprising a 2D X-ray source and a 2D monochromator and being arranged upstream of the sample holder for generating and directing an X-ray beam along a beam path in a propagation direction (Y) towards the sample holder ; - an X-ray detector , placed inside a diffraction chamber connected to the sample vacuum chamber , wherein the X-ray detector is arranged downstream of the sample holder and is movable, in particular in a motorized way, along the propagation direction such as to detect the X-ray beam and X-rays scattered at different scattering angles from the sample ; - wherein the X-ray beam delivery system is configured to focus the X-ray beam onto a focal spot on or near the X-ray detector when placed at its distal position having the largest distance from the sample holder or to produce a parallel beam, - a Bonse Hart monochromator module positioned upstream of the sample holder and being equipped with a motorized monochromator holder; - a Bonse Hart analyzer module positioned downstream of the sample holder and being equipped with a motorized analyzer holder ; wherein both the motorized monochromator holder and the motorized analyzer holder are configured such as to simultaneously position their respective modules in an active position in the X-ray beam for USAXS measurements and in an inactive position out of the X-ray beam for SAXS measurements, characterized in that the X-ray scattering apparatus furthermore comprises a storage chamber integral with or connected to the sample vacuum chamber and/or the diffraction chamber, and that the motorized analyzer holder is furthermore configured to position the Bonse Hart analyzer module in a storage position in the storage chamber . - a sample vacuum chamber ; - a sample holder placed inside the sample vacuum chamber for aligning and/or orienting a sample to be analyzed by X-ray scattering; - an X-ray beam delivery system comprising a 2D X-ray source and a 2D monochromator and being arranged upstream of the sample holder for generating and directing an X-ray beam along a beam path in a propagation direction (Y) towards the sample holder ; - an X-ray detector , placed inside a diffraction chamber connected to the sample vacuum chamber , wherein the X-ray detector is arranged downstream of the sample holder and is movable, in particular in a motorized way, along the propagation direction such as to detect the X-ray beam and X-rays scattered at different scattering angles from the sample ; - wherein the X-ray beam delivery system is configured to focus the X-ray beam onto a focal spot on or near the X-ray detector when placed at its distal position having the largest distance from the sample holder or to produce a parallel beam, - a Bonse Hart monochromator module positioned upstream of the sample holder and being equipped with a motorized monochromator holder; - a Bonse Hart analyzer module positioned downstream of the sample holder and being equipped with a motorized analyzer holder ; wherein both the motorized monochromator holder and the motorized analyzer holder are configured such as to simultaneously position their respective modules in an active position in the X-ray beam for USAXS measurements and in an inactive position out of the X-ray beam for SAXS measurements, characterized in that the X-ray scattering apparatus furthermore comprises a storage chamber integral with or connected to the sample vacuum chamber and/or the diffraction chamber, and that the motorized analyzer holder is furthermore configured to position the Bonse Hart analyzer module in a storage position in the storage chamber . <EOS>