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Research and development of an electron beam focusing system for a high-brightness X-ray generator
A new type of rotating anticathode X-ray generator, where an electron beam of up to 60 keV irradiates the inner surface of a U-shaped Cu anticathode, has achieved a beam brilliance of 130 kW mm(−2) (at 2.3 kW). A higher-flux electron beam is expected from simulation by optimizing the geometry of a c...
Autores principales: | , , , , |
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Formato: | Texto |
Lenguaje: | English |
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International Union of Crystallography
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3004255/ https://www.ncbi.nlm.nih.gov/pubmed/21169692 http://dx.doi.org/10.1107/S0909049510029948 |
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author | Sakai, Takeshi Ohsawa, Satoshi Sakabe, Noriyoshi Sugimura, Takashi Ikeda, Mitsuo |
author_facet | Sakai, Takeshi Ohsawa, Satoshi Sakabe, Noriyoshi Sugimura, Takashi Ikeda, Mitsuo |
author_sort | Sakai, Takeshi |
collection | PubMed |
description | A new type of rotating anticathode X-ray generator, where an electron beam of up to 60 keV irradiates the inner surface of a U-shaped Cu anticathode, has achieved a beam brilliance of 130 kW mm(−2) (at 2.3 kW). A higher-flux electron beam is expected from simulation by optimizing the geometry of a combined-function-type magnet instead of the fringing field of the bending magnet. In order to minimize the size of the X-ray source the electron beam has been focused over a short distance by a new combined-function bending magnet, whose geometrical shape was determined by simulation using the Opera-3D, General Particle Tracer and CST-STUDIO codes. The result of the simulation clearly shows that the role of combined functions in both the bending and the steering magnets is important for focusing the beam to a small size. FWHM sizes of the beam are predicted by simulation to be 0.45 mm (horizontal) and 0.05 mm (vertical) for a 120 keV/75 mA beam, of which the effective brilliance is about 500 kW mm(−2) on the supposition of a two-dimensional Gaussian distribution. High-power tests have begun using a high-voltage 120 kV/75 mA power supply for the X-ray generator instead of 60 kV/100 mA. The beam focus size on the target will be verified in the experiments. |
format | Text |
id | pubmed-3004255 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-30042552010-12-23 Research and development of an electron beam focusing system for a high-brightness X-ray generator Sakai, Takeshi Ohsawa, Satoshi Sakabe, Noriyoshi Sugimura, Takashi Ikeda, Mitsuo J Synchrotron Radiat Diffraction Structural Biology A new type of rotating anticathode X-ray generator, where an electron beam of up to 60 keV irradiates the inner surface of a U-shaped Cu anticathode, has achieved a beam brilliance of 130 kW mm(−2) (at 2.3 kW). A higher-flux electron beam is expected from simulation by optimizing the geometry of a combined-function-type magnet instead of the fringing field of the bending magnet. In order to minimize the size of the X-ray source the electron beam has been focused over a short distance by a new combined-function bending magnet, whose geometrical shape was determined by simulation using the Opera-3D, General Particle Tracer and CST-STUDIO codes. The result of the simulation clearly shows that the role of combined functions in both the bending and the steering magnets is important for focusing the beam to a small size. FWHM sizes of the beam are predicted by simulation to be 0.45 mm (horizontal) and 0.05 mm (vertical) for a 120 keV/75 mA beam, of which the effective brilliance is about 500 kW mm(−2) on the supposition of a two-dimensional Gaussian distribution. High-power tests have begun using a high-voltage 120 kV/75 mA power supply for the X-ray generator instead of 60 kV/100 mA. The beam focus size on the target will be verified in the experiments. International Union of Crystallography 2011-01-01 2010-11-05 /pmc/articles/PMC3004255/ /pubmed/21169692 http://dx.doi.org/10.1107/S0909049510029948 Text en © Takeshi Sakai et al. 2011 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited. |
spellingShingle | Diffraction Structural Biology Sakai, Takeshi Ohsawa, Satoshi Sakabe, Noriyoshi Sugimura, Takashi Ikeda, Mitsuo Research and development of an electron beam focusing system for a high-brightness X-ray generator |
title | Research and development of an electron beam focusing system for a high-brightness X-ray generator |
title_full | Research and development of an electron beam focusing system for a high-brightness X-ray generator |
title_fullStr | Research and development of an electron beam focusing system for a high-brightness X-ray generator |
title_full_unstemmed | Research and development of an electron beam focusing system for a high-brightness X-ray generator |
title_short | Research and development of an electron beam focusing system for a high-brightness X-ray generator |
title_sort | research and development of an electron beam focusing system for a high-brightness x-ray generator |
topic | Diffraction Structural Biology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3004255/ https://www.ncbi.nlm.nih.gov/pubmed/21169692 http://dx.doi.org/10.1107/S0909049510029948 |
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