Line focus x-ray tubes-a new concept to produce high brilliance x-rays.
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Date
2017-10-27ICR Author
Author
Bartzsch, S
Oelfke, U
Type
Journal Article
Metadata
Show full item recordAbstract
Currently hard coherent x-ray radiation at high photon fluxes can only be produced with large and expensive radiation sources, such as 3[Formula: see text] generation synchrotrons. Especially in medicine, this limitation prevents various promising developments in imaging and therapy from being translated into clinical practice. Here we present a new concept of highly brilliant x-ray sources, line focus x-ray tubes (LFXTs), which may serve as a powerful and cheap alternative to synchrotrons and a range of other existing technologies. LFXTs employ an extremely thin focal spot and a rapidly rotating target for the electron beam which causes a change in the physical mechanism of target heating, allowing higher electron beam intensities at the focal spot. Monte Carlo simulations and numeric solutions of the heat equation are used to predict the characteristics of the LFXT. In terms of photon flux and coherence length, the performance of the line focus x-ray tube compares with inverse Compton scattering sources. Dose rates of up to 180 Gy [Formula: see text] can be reached in 50 cm distance from the focal spot. The results demonstrate that the line focus tube can serve as a powerful compact source for phase contrast imaging and microbeam radiation therapy. The production of a prototype seems technically feasible.
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Subject
Humans
Radiography
Monte Carlo Method
Phantoms, Imaging
Photons
Synchrotrons
X-Rays
Research team
Radiotherapy Physics Modelling
Language
eng
License start date
2017-10-27
Citation
Physics in medicine and biology, 2017, 62 (22), pp. 8600 - 8615
Publisher
IOP PUBLISHING LTD