Research and development of an electron beam focusing system for a high-brightness X-ray generator.
Identifieur interne : 000829 ( Ncbi/Checkpoint ); précédent : 000828; suivant : 000830Research and development of an electron beam focusing system for a high-brightness X-ray generator.
Auteurs : Takeshi Sakai [Japon] ; Satoshi Ohsawa ; Noriyoshi Sakabe ; Takashi Sugimura ; Mitsuo IkedaSource :
- Journal of synchrotron radiation ; 2011.
English descriptors
- KwdEn :
- MESH :
- instrumentation : Synchrotrons.
- Electrons, Equipment Design, X-Rays.
Abstract
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.
DOI: 10.1107/S0909049510029948
PubMed: 21169692
Affiliations:
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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.</div></front></TEI><affiliations><list><country><li>Japon</li></country></list><tree><noCountry><name sortKey="Ikeda, Mitsuo" sort="Ikeda, Mitsuo" uniqKey="Ikeda M" first="Mitsuo" last="Ikeda">Mitsuo Ikeda</name><name sortKey="Ohsawa, Satoshi" sort="Ohsawa, Satoshi" uniqKey="Ohsawa S" first="Satoshi" last="Ohsawa">Satoshi Ohsawa</name><name sortKey="Sakabe, Noriyoshi" sort="Sakabe, Noriyoshi" uniqKey="Sakabe N" first="Noriyoshi" last="Sakabe">Noriyoshi Sakabe</name><name sortKey="Sugimura, Takashi" sort="Sugimura, Takashi" uniqKey="Sugimura T" first="Takashi" last="Sugimura">Takashi Sugimura</name></noCountry><country name="Japon"><noRegion><name sortKey="Sakai, Takeshi" sort="Sakai, Takeshi" uniqKey="Sakai T" first="Takeshi" last="Sakai">Takeshi Sakai</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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