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Ravichandran, M.* ; Winter, J.* ; Dimroth, A.* ; Bartzsch, S. ; Kraus, K.M.* ; Zimmermann, M.*

Design and validation strategy for an X-ray target subject to ultra high heat flux loading.

J. Therm. Sci. Eng. Appl. 17:9 (2025)
Verlagsversion DOI
Open Access Hybrid
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Microbeam X-ray therapy is a promising cancer therapy that uses a high-power electron beam hitting a metallic target. For a clinical microbeam therapy X-ray source, an electron beam of a power of 1 MW onto a focal spot of 0.05 mm x 20 mm size is needed, with a penetration depth of 0.1 mm. This means a heat flux input of 1 TW/m2, an order of magnitude higher than nuclear and medical applications. Numerical simulations based on surface and volumetric heat loading for such an electron beam are presented in this work. The local temperature around the focal spot is modeled in a lower-scale model with an element size of 10 mu m and volumetric heat loading. This differs from the state-of-the-art simulations, in which electron beam loading is modeled as surface heat flux loads. The simulated temperature agrees with the mathematical estimates within an error of 10% while proving feasibility. A novel validation strategy is proposed to address the lack of available test facilities to replicate this extreme heat flux. The critical parameters describing the high-heat-flux- loading are identified as temperature, thermal strain, thermal stress, and strain rate. Scaled-down test specifications are determined to use a test facility of power less than 100 kW. With the verified simulation using the scaled-down test, it is proposed to establish the material's capability to withstand the concentrated1 MW heat load without a 1 MW test facility.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter biotechnology; heat and mass transfer; micro/nanoscale heat transfer; radiative heat transfer; very high-temperature heat transfer; Radiation-therapy; Thermal-stresses; Tungsten; Surface
Sprache englisch
Veröffentlichungsjahr 2025
HGF-Berichtsjahr 2025
ISSN (print) / ISBN 1948-5085
e-ISSN 1948-5093
Zeitschrift Journal of Thermal Science and Engineering Applications
Quellenangaben Band: 17, Heft: 3, Seiten: , Artikelnummer: 9 Supplement: ,
Verlag American Society of Mechanical Engineers (ASME)
Verlagsort Two Park Ave, New York, Ny 10016-5990 Usa
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Radiation Medicine (IRM)
POF Topic(s) 30203 - Molecular Targets and Therapies
Forschungsfeld(er) Radiation Sciences
PSP-Element(e) G-501300-001
Förderungen Technical University of Munich-Institute for Advanced Study
Lander
Free State of Bavaria under the Excellence Strategy of the Federal Government
Federal Ministry of Education and Research (BMBF)
DOI 10.1115/1.4067589
WOS ID 001414176700005
Scopus ID 85217825730
Erfassungsdatum 2025-04-14
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