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Performance of an electron gun for a high-brightness X-ray generator
A prototype thermionic electron gun for a high-brightness X-ray generator has been developed. Its extraction voltage and design current are 60 kV and 100 mA (DC), respectively. The X-ray generator aims towards a maximum brilliance of 60 kW mm(−2). The beam sizes at the rotating anticathode must ther...
Autores principales: | , , |
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Formato: | Texto |
Lenguaje: | English |
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International Union of Crystallography
2008
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2394796/ https://www.ncbi.nlm.nih.gov/pubmed/18421153 http://dx.doi.org/10.1107/S0909049507066769 |
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author | Sugimura, Takashi Ohsawa, Satoshi Ikeda, Mitsuo |
author_facet | Sugimura, Takashi Ohsawa, Satoshi Ikeda, Mitsuo |
author_sort | Sugimura, Takashi |
collection | PubMed |
description | A prototype thermionic electron gun for a high-brightness X-ray generator has been developed. Its extraction voltage and design current are 60 kV and 100 mA (DC), respectively. The X-ray generator aims towards a maximum brilliance of 60 kW mm(−2). The beam sizes at the rotating anticathode must therefore be within 1.0 mm × 0.1 mm and a small beam emittance is required. The fabricated electron gun optimizes an aperture grid and a Whenelt electrode. The performance of the prototype electron gun measured using pulsed-beam tests is as follows: maximum beam current, 85.7 mA; beam focus size at the rotating anticathode, 0.79 mm × 0.13 mm. In DC beam tests, FWHM beam sizes were measured to be 0.65 mm × 0.08 mm at the rotating anticathode with a beam current of 45 mA. The beam current recently reached ∼60 mA with some thermal problems. |
format | Text |
id | pubmed-2394796 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2008 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-23947962009-03-05 Performance of an electron gun for a high-brightness X-ray generator Sugimura, Takashi Ohsawa, Satoshi Ikeda, Mitsuo J Synchrotron Radiat Diffraction Structural Biology A prototype thermionic electron gun for a high-brightness X-ray generator has been developed. Its extraction voltage and design current are 60 kV and 100 mA (DC), respectively. The X-ray generator aims towards a maximum brilliance of 60 kW mm(−2). The beam sizes at the rotating anticathode must therefore be within 1.0 mm × 0.1 mm and a small beam emittance is required. The fabricated electron gun optimizes an aperture grid and a Whenelt electrode. The performance of the prototype electron gun measured using pulsed-beam tests is as follows: maximum beam current, 85.7 mA; beam focus size at the rotating anticathode, 0.79 mm × 0.13 mm. In DC beam tests, FWHM beam sizes were measured to be 0.65 mm × 0.08 mm at the rotating anticathode with a beam current of 45 mA. The beam current recently reached ∼60 mA with some thermal problems. International Union of Crystallography 2008-05-01 2008-04-18 /pmc/articles/PMC2394796/ /pubmed/18421153 http://dx.doi.org/10.1107/S0909049507066769 Text en © International Union of Crystallography 2008 http://journals.iucr.org/services/termsofuse.html This is an open-access article distributed under the terms described at http://journals.iucr.org/services/termsofuse.html. |
spellingShingle | Diffraction Structural Biology Sugimura, Takashi Ohsawa, Satoshi Ikeda, Mitsuo Performance of an electron gun for a high-brightness X-ray generator |
title | Performance of an electron gun for a high-brightness X-ray generator |
title_full | Performance of an electron gun for a high-brightness X-ray generator |
title_fullStr | Performance of an electron gun for a high-brightness X-ray generator |
title_full_unstemmed | Performance of an electron gun for a high-brightness X-ray generator |
title_short | Performance of an electron gun for a high-brightness X-ray generator |
title_sort | performance of an electron gun for a high-brightness x-ray generator |
topic | Diffraction Structural Biology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2394796/ https://www.ncbi.nlm.nih.gov/pubmed/18421153 http://dx.doi.org/10.1107/S0909049507066769 |
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