X-ray radiation is widely used in medical, industrial and research applications. New developments in X-ray optics and detectors opened possibilities to reduce the necessary source intensities by at least 2 orders of magnitude to obtain similar results in comparable times. In consequence a new generation of compact low power microfocus x-ray tubes is required. The substitution of thermionic cathodes by field emitters offer means to reduce the size and power demand of miniature X-ray sources. Therefore, carbon fibre and carbon nanotube (CNT) field emitters have been investigated in a recent research project as promising electron sources for miniature X-ray tubes. We discuss the influence of electron-source design parameters on X-ray properties, in dependence on different carbon field emitter types. Finally, a comparison between low-power X-ray devices with thermionic and with carbon field emitter cathodes is given in a table.
CITATION STYLE
Langhoff, N., Simionovici, A., Arkadiev, V., Knüpfer, W., Čechák, T., Leonhardt, J., & Chavanne, J. (2007). X-Ray Sources. In Handbook of Practical X-Ray Fluorescence Analysis (pp. 33–83). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-540-36722-2_2
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