Bartzsch, S., Oelfke, U. (2017) Line focus x-ray tubes-a new concept to produce high brilliance x-rays. PHYSICS IN MEDICINE AND BIOLOGY, 62 (22). pp. 8600-8615. ISSN 0031-9155

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Abstract

Currently hard coherent x-ray radiation at high photon fluxes can only be produced with large and expensive radiation sources, such as 3rd 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 s(-1) 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.

Item Type:	Article
Authors (ICR Faculty only):	Oelfke, Uwe
All Authors:	Bartzsch, S., Oelfke, U.
Additional Information:	ISI Document Delivery No.: FK9YO Times Cited: 0 Cited Reference Count: 24 Bartzsch, Stefan Oelfke, Uwe CRUK Pioneer award [C57410/A21787] This work was supported by a CRUK Pioneer award, grant number C57410/A21787. 0 1 Iop publishing ltd Bristol 1361-6560
Uncontrolled Keywords:	microbeam radiation therapy x-rays compact radiation sources high dose rate phase contrast imaging coherence computed-tomography synchrotron tissues Engineering Radiology, Nuclear Medicine & Medical Imaging
Research teams:	ICR divisions > Radiotherapy and Imaging > Radiotherapy Physics Modelling
Depositing User:	Barry Jenkins
Date Deposited:	18 Dec 2017 11:11
Last Modified:	18 Dec 2017 11:11
URI:	http://publications.icr.ac.uk/id/eprint/16470

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