Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Yuya Koshiba"'
Autor:
Yuya Koshiba, Seiya Otsuka, Koki Yamashita, Chikara Fukushima, Sakae Araki, Alexander Aryshev, Tsunehiko Omori, Konstantin Popov, Tohru Takahashi, Nobuhiro Terunuma, Yuuki Uesugi, Junji Urakawa, Masakazu Washio
Publikováno v:
Optics express. 30(24)
Optical enhancement cavities enabling laser pulses to be coherently stacked in free space are used in several applications to enhance accessible optical power. In this study, we develop an optical cavity that accumulates harmonically mode-locked lase
Autor:
Yuya Koshiba, Junji Urakawa, Masakazu Washio, Kazuyuki Sakaue, Ryosuke Morita, Koki Yamashita, Takeshi Higashiguchi
Publikováno v:
International Journal of Radiation Biology. 99:77-81
Monochromatic hard X-rays with high brightness are desired for medical applications including Auger therapy. One can generate such X-rays through laser-Compton scattering (LCS) by allowing photons from a compact laser system to interact with electron
Autor:
Yuya Koshiba, Yuichi Tadenuma, Masakazu Washio, Toshikazu Takatomi, Kazuyuki Sakaue, Seiya Otsuka, J. Urakawa
Publikováno v:
Physical Review Accelerators and Beams, Vol 24, Iss 8, p 083401 (2021)
Ultrashort electron bunches are becoming increasingly important for applications such as free-electron lasers, time-resolved electron diffraction/microscopy, and advanced accelerator concepts. We report femtosecond electron bunch generation with a un
Autor:
Takeshi Higashiguchi, Kazuyuki Sakaue, Yuya Koshiba, Ryosuke Morita, Masakazu Washio, Junji Urakawa, Koki Yamashita
Publikováno v:
OSA High-brightness Sources and Light-driven Interactions Congress 2020 (EUVXRAY, HILAS, MICS).
X-ray enhancement by the crab crossing of electrons and laser photons in laser-Compton scattering (LCS) is studied. Current status of our crab crossing LCS experiment and the development of thin-disk regenerative amplifier is reported.
Publikováno v:
Journal of Instrumentation. 15:C05006-C05006
Autor:
Takeshi Higashiguchi, Yuya Koshiba, Kazuyuki Sakaue, Masakazu Washio, Junji Urakawa, Shogo Ota, Ryosuke Morita
We are going to apply crab crossing of electrons and laser photons for the enhancement of laser-Compton X-ray flux. Crab crossing will enable quasi-head-on collision and increase the luminosity. Therefore, it could be combined with an optical enhance
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed34ae8ba5bd7aca85a5f18adc1d02c1
Autor:
Ryunosuke Kuroda, M. Mizugaki, Toshikazu Takatomi, Kazuyuki Sakaue, Masakazu Washio, Yuya Koshiba, Junji Urakawa
Publikováno v:
Vibrational Spectroscopy. 75:184-189
The coherent radiation spectrum extends into the far-infrared/THz region when the electron bunch is shorter than 1 ps (0.3 mm). Such ultra-short electron bunches can be produced using a variety of bunching schemes in electron accelerators. We have de
Autor:
Yuya Koshiba, Kazuyuki Sakaue, Thanh Hung Dinh, Masahito Tanaka, Hiroshi Ogawa, Hiroyuki Hara, Tatsunori Shibuya, Yohei Kobayashi, Takashi Takahashi, Ryunosuke Kuroda, Masahiko Ishino, Masaharu Nishikino, Masakazu Washio, Takeshi Higashiguchi
Publikováno v:
Applied Physics Letters. 113:171902
A free-electron laser (FEL) is a robust tool for studying the interaction of intense X-rays with matter. In this study, we investigate the damage threshold and morphology of fused silica irradiated by extreme ultraviolet femtosecond pulses of a FEL.
Autor:
Yuya Koshiba, Ryunosuke Kuroda, Masakazu Washio, M. Mizugaki, Toshikazu Takatomi, Kazuyuki Sakaue, Junji Urakawa
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 17, Iss 2, p 023401 (2014)
We present a new design for a rf electron gun to be used in ultrashort ($\ensuremath{\sim}1\text{ }\text{ }\mathrm{ps}$) electron bunch generation. Using both simulation and measurement we evaluated the principle of this new type rf gun and were able
Autor:
Tsunehiko Omori, Yuji Hosaka, Tohru Takahashi, Shunichi Sato, Yuuki Uesugi, Masakazu Washio, Seiya Otsuka, Masafumi Fukuda, Junji Urakawa, Nobuhiro Terunuma, Alexander Aryshev, Yuya Koshiba
Publikováno v:
Scopus-Elsevier
A single-longitudinal-mode operation of a self-resonating enhancement cavity with the finesse of 524 was achieved without any feedback control, demonstrating a capability to automaticaly follow the cavity resonance frequency against environmental dis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff244c097ad34d227ac78d8742404232
http://www.scopus.com/inward/record.url?eid=2-s2.0-85091643063&partnerID=MN8TOARS
http://www.scopus.com/inward/record.url?eid=2-s2.0-85091643063&partnerID=MN8TOARS