Abstract
A compact X-ray source (1 dm 3) has been built, the basis of X-ray production being that of bremsstrahlung (Br) of the hot electrons generated in situ in the core of a hot magnetized plasma. Among the advantages of this device are that it can be pulsed or operated in a stable continuous mode and that there is no requirement for any filament nor high-voltage power supply. Thick-target Br (from a solid material) is involved, first in view of investigating runaway electrons leaking to the lateral walls. Second and more importantly, the features of thick-target Br are exploited in order to make the X-ray source point-like and more intense, a small target being inserted in the way of the hot electrons. The brightness obtained at 20 keV is 3.5×10 11 photons s −1 mm −2 sr −1 keV −1, which for example allows the obtaining of mammographic images in exposure times of a few seconds.
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