Abstract: X-ray inspection systems have been used on airports for many years to check luggage in order to detect weapons and similar objects. In the meantime the requirements changed and the technology was improved concerning the detection of explosives. Even the requirement of automatic operation can be met. A step-by-step arrangement is described, consisting of two advanced devices: stage one is a new x ray luggage inspection system sensitive to the presence of explosives and other suspicious items, which also copes with the requirement of a high throughput; the second stage is based on x-ray diffraction and provides complementary information on the objects, thus ensuring high quality decisions. !1
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