Electron-Impact Liquid-Jet Water-Window X-ray Sources
2010 (English)Licentiate thesis, comprehensive summary (Other academic)
This Thesis describes the development and characterization of a soft x-ray liquidjet-anode electron-impact source. With a water-jet target the primary emission is the O Kα line at 525 eV. This is close to the lower edge of the water-window, a spectral region lacking simple laboratory sources. In the hard x-ray regime electronimpact microfocus sources have matured and are simple, stable, reliable, and inexpensive. It would be beneficial if this source concept could be used also for soft x-ray generation.
Spectral measurements of a 120 W, 30 keV electron beam focused on a 20 μm water jet show an x-ray intensity of up to 3.2 × 1012 ph/(s×sr×line). Combined with source size measurements up to 50 W a maximum brightness of 3.5 × 109 ph/(s×μm2×sr×line) is reported. This makes the brightness comparable to the compact discharge-plasma sources presently used for soft x-ray microscopy. The source appears to be scalable another order of magnitude which would make the brightness equal to that of the laser-plasma sources.
Place, publisher, year, edition, pages
Stockholm: Universitetsservice US AB , 2010. , xiii, 37 p.
Trita-FYS, ISSN 0280-316X ; 2010:68
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-28622ISBN: 978-91-7415-825-0OAI: oai:DiVA.org:kth-28622DiVA: diva2:388736
2010-12-10, Sal FB42, KTH, Roslagstullsbacken 21, AlbaNova, Stockholm, 10:00
Tjernberg, Oscar, Professor
Hertz, Hans M., Professor
QC 201101192011-01-192011-01-182012-04-02Bibliographically approved
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