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A Liquid-Metal-Jet Anode X-Ray Tube
KTH, Superseded Departments, Physics.
KTH, Superseded Departments, Physics.
KTH, Superseded Departments, Physics.ORCID iD: 0000-0003-2723-6622
2004 (English)In: Optical Engineering: The Journal of SPIE, ISSN 0091-3286, E-ISSN 1560-2303, Vol. 43, no 7, p. 1682-1688Article in journal (Refereed) Published
Abstract [en]

We describe a novel electron-impact x-ray source based on a high-speed liquid-metal-jet anode. Thermal power load calculations indicate that this new anode concept potentially could increase the achievable brightness in compact electron-impact x-ray sources by more than a factor 100 compared to current state-of-the-art rotating-anode or microfocus sources. A first, successful, low-power proof-of-principle experiment is described and the feasibility of scaling to high-brightness and high-power operation is discussed. Some possible applications that would benefit from such an increase in brightness are also briefly

Place, publisher, year, edition, pages
2004. Vol. 43, no 7, p. 1682-1688
Keywords [en]
brightness, X-ray source, electron-impact, liquid-metal jet
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-5835DOI: 10.1117/1.1737787ISI: 000222641200028Scopus ID: 2-s2.0-4143078120OAI: oai:DiVA.org:kth-5835DiVA, id: diva2:10347
Note
QC 20100915 QC 20111101. Conference on Laser-Generated and Other Laboratory X-Ray and EUV Sources, Optics, and Applications. San Diego, CA. AUG 04-06, 2003 Available from: 2006-05-30 Created: 2006-05-30 Last updated: 2017-12-14Bibliographically approved
In thesis
1. A Compact High-Brightness Liquid-Metal-Jet X-Ray Source
Open this publication in new window or tab >>A Compact High-Brightness Liquid-Metal-Jet X-Ray Source
2006 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis describes the development and characterization of a compact high-brightness liquid-metal-jet anode x-ray source. Initial calculations show that a source based on this concept could potentially lead to a >100-fold increase of the brightness compared to current state-of-the-art rotating-anode x-ray sources. This improvement is due to an increased thermal load capacity of the anode.

A low-power proof-of-principle source has been built, and experiments show that the liquid-metal-jet anode can be operated at more than an order of magnitude higher power densities than modern solid-metal anodes. This brightness enhancement has been utilized to acquire in-line phase-contrast images of weakly absorbing objects with substantially shorter exposure times than previously reported. To be able to target different application areas different liquid-jet-anode materials have been tested. The Sn-jet anode could potentially be used in mammography examinations, whereas the Ga-jet could be utilized for, e.g., protein-structure determination with x-ray diffraction.

Scaling to higher power and brightness levels is discussed and seems conceivable. A potential obstacle for further development of this source concept, the generation of a microscopic high-speed liquid-metal jet in vacuum, is investigated and is proven to be feasible. Dynamic-similarity experiments using water jets to simulate 30-μm, ~500-m/s tin and gallium jets show good coherence and directional stability of the jet. Other potential difficulties in the further source development, such as excessive debris emission and instabilities of the x-ray emission spot, are also investigated in some detail.

Place, publisher, year, edition, pages
Stockholm: KTH, 2006. p. xii, 61
Series
Trita-FYS, ISSN 0280-316X ; 2006:36
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-4005 (URN)91-7178-371-7 (ISBN)
Public defence
2006-06-09, Sal D3, Lindstedtsvägen 5, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC 20100915Available from: 2006-05-30 Created: 2006-05-30 Last updated: 2010-09-15Bibliographically approved

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Hertz, Hans M.

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