Design and performance of a laboratory based source of characteristic x-rays

Stewart Michael Midgley

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    A theoretical description for the production of characteristic X-rays (CX) is reviewed highlighting features that enhance the CX intensity. These are incorporated into the design of a secondary target system for excitation by white radiation produced by an industrial X-ray tube; Philips MCN-166, capable of continuous operation at up to 160 kVp and 1.6 kW. Results are presented for the measured spatial profile, CX intensity at 8-75 keV and spectral purity as a function of accelerating voltage. The beam is a narrow fan with half height (horizontal by vertical) 200 mm by 50 mm at 1 m from the source. The beam intensity is presented in units ph/s/mm2 at 1 m per kW and is equivalent to an isotope source with activities 100-300 mCi per kW deposited in the anode. The source provides variable intensity and the ability to change energy by simply exchanging the target material.
    Original languageEnglish
    Pages (from-to)3403 - 3410
    Number of pages8
    JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    Issue number21
    Publication statusPublished - 2010

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