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Liquid-Metal-Jet Anode Electron-Impact X-Ray Source
KTH, Tidigare Institutioner                               , Fysik.
KTH, Tidigare Institutioner                               , Fysik.ORCID-id: 0000-0003-2723-6622
KTH, Tidigare Institutioner                               , Fysik.
2003 (engelsk)Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 83, s. 1483-1485Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A liquid-metal-jet anode for improved brightness in compact electron-impact x-ray source was investigated. The generated x-ray flux and brightness was quantitatively measured in the 7-50 keV spectral region and found to agree with the theory. Applications such as mammography, angiography, and diffraction would benefit from a compact high-brightness source.

sted, utgiver, år, opplag, sider
2003. Vol. 83, s. 1483-1485
Emneord [en]
Angiography, Diffraction, Mammography, X ray analysis
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-5834DOI: 10.1063/1.1602157ISI: 000184748600068OAI: oai:DiVA.org:kth-5834DiVA, id: diva2:10346
Merknad
QC 20100915Tilgjengelig fra: 2006-05-30 Laget: 2006-05-30 Sist oppdatert: 2017-12-14bibliografisk kontrollert
Inngår i avhandling
1. A Compact High-Brightness Liquid-Metal-Jet X-Ray Source
Åpne denne publikasjonen i ny fane eller vindu >>A Compact High-Brightness Liquid-Metal-Jet X-Ray Source
2006 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
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.

sted, utgiver, år, opplag, sider
Stockholm: KTH, 2006. s. xii, 61
Serie
Trita-FYS, ISSN 0280-316X ; 2006:36
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-4005 (URN)91-7178-371-7 (ISBN)
Disputas
2006-06-09, Sal D3, Lindstedtsvägen 5, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad
QC 20100915Tilgjengelig fra: 2006-05-30 Laget: 2006-05-30 Sist oppdatert: 2010-09-15bibliografisk kontrollert

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