Search Results - "Ego, Hiroyasu"
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Low-emittance thermionic-gun-based injector for a compact free-electron laser
Published in Physical review. Accelerators and beams (14-08-2017)“…A low-emittance thermionic-gun-based injector was developed for the x-ray free-electron laser (XFEL) facility known as the SPring-8 angstrom compact…”
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2
Compact HOM-damping structure of a beam-accelerating TM020 mode rf cavity
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-07-2024)“…A compact HOM-damping beam-accelerating rf cavity was developed to mitigate coupled-bunch instabilities in electron storage rings. This cavity operates in the…”
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A compact X-ray free-electron laser emitting in the sub-ångström region
Published in Nature photonics (01-08-2012)“…The free-electron laser, first proposed by Madey 1 in 1971, has significantly reduced laser wavelengths to the vacuum ultraviolet 2 , 3 and soft X-ray regions…”
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RF input coupler with a coupling tuner for an RF acceleration cavity
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-08-2006)“…In a storage ring with a high-current beam, RF coupling between an RF acceleration cavity and a waveguide is usually fixed to high overcoupling. In operation…”
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HOM-damped re-entrant quasi-half-cell cavity for the SPring-8 storage ring
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (11-01-2004)“…A newly designed RF accelerating cavity resonating 508.58 MHz is proposed for reinforcement of beam current in the SPring-8 storage ring. Since an increase in…”
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6
Vacuum seal for a rectangular flange
Published in Vacuum (25-03-2011)“…A new vacuum seal for a rectangular flange used in r.f. equipments, was developed. The vacuum seal consists of a recess with a flat surface, machined into a…”
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Integrated Dark Current Radiation Study for Accelerator Structures Using ACE3P and Geant4
Published in 2024 Joint International Vacuum Electronics Conference and International Vacuum Electron Sources Conference (IVEC + IVESC) (23-04-2024)“…A simulation workflow, ACE3P-G4, has been under development to study dark current (DC) radiation effects using ACE3P and Geant4. ACE3P-G4 interfaces particle…”
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Conference Proceeding -
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A compact X-ray free-electron laser emitting in the sub-?ngstrom region
Published in Nature photonics (01-08-2012)“…The free-electron laser, first proposed by Madey in 1971, has significantly reduced laser wavelengths to the vacuum ultraviolet and soft X-ray regions…”
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9
An Integrated Simulation Tool for Dark Current Radiation Effects Using ACE3P and Geant4
Published 18-08-2023“…A simulation workflow is under development to interface particle data transfer and matching of geometry between the electromagnetic (EM) cavity simulation code…”
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Achievement of 200,000 hours of operation at KEK 7-GeV electron 4-GeV positron injector linac
Published 04-07-2022“…J. Phys. Conf. Ser. 2420, 2023, 012021 KEK electron positron injector LINAC initiated the injection operation into Photon Factory (PF) light source in 1982…”
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11
Formation of a single-bunch beam in the booster synchrotron at SPring-8
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (21-04-2000)“…In order to fill an radio frequency (rf) bucket with an electron beam in the storage ring at SPring-8, an rf knockout system was installed in the booster…”
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