Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Kazuyoshi Koyama"'
Autor:
Kazuyoshi Koyama, Mitsuru Uesaka
Publikováno v:
Reviews of Accelerator Science and Technology. :235-260
We review advanced accelerators for medical applications with respect to the following key technologies: (i) higher RF electron linear accelerator (hereafter “linac”); (ii) optimization of alignment for the proton linac, cyclotron and synchrotron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87ea951c144d8feb27871f31082b9a4b
https://doi.org/10.1142/s1793626816300115
https://doi.org/10.1142/s1793626816300115
Publikováno v:
AIP Conference Proceedings.
Dielectric laser acceleration of electrons has been demonstrated recently with the potential to miniaturize accelerators. Here, we present results of the numerical investigation of a silicon colonnade structure that consists of two rows of pillars fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3964169d6e2a7eef17026495e5182261
https://doi.org/10.1063/1.4975872
https://doi.org/10.1063/1.4975872
Publikováno v:
International Journal of Applied Electromagnetics and Mechanics. 39:405-411
Inthispaper, anumerical code isdeveloped for theanalysis of phased-array laserultrasound. Thesignal enhancement of ultrasonic waves induced by a multi-beam laser source in phased array is simulated by using finite element method (FEM). The use of pha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b029e1035493fca699a4334c7ddf762b
https://doi.org/10.3233/jae-2012-1489
https://doi.org/10.3233/jae-2012-1489
Publikováno v:
Optics & Laser Technology. 44:860-865
A numerical model based on the finite element method (FEM) is developed for crack inspection using laser-induced ultrasonic waves with the shadow method. Before the simulation, the numerical code is verified by comparing the directivity patterns of u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6f48c7943f0b1ac70a957ddaf86d096
https://doi.org/10.1016/j.optlastec.2011.11.018
https://doi.org/10.1016/j.optlastec.2011.11.018
Publikováno v:
Applied Physics Letters. 113:124101
We propose a chip-scale hollow-core waveguide using high-contrast gratings as reflectors for dielectric laser acceleration. We show that confinement of a specified accelerating mode can be achieved by adjusting the thickness of a matching layer betwe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::edd6653e005a0b32032042a86c6a58e2
https://doi.org/10.1063/1.5045547
https://doi.org/10.1063/1.5045547
Publikováno v:
Applied Physics Letters. 112:034102
We show that the accelerating gradient of a dual-grating structure for dielectric laser acceleration of subrelativistic electrons can be enhanced by resonating with the zeroth diffraction order inside the channel. We analyze diffraction of light at a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::abaa257e165818a6d041f6a862b16550
https://doi.org/10.1063/1.5010144
https://doi.org/10.1063/1.5010144
Autor:
Eiji Tanabe, Masashi Yamamoto, Kazuyuki Demachi, Mitsuru Uesaka, Naoki Nakamura, Eiko Hashimoto, Takuya Natsui, Tomohiko Yamamoto, Kazuyoshi Koyama
Publikováno v:
International Journal of Automation Technology. 3:523-532
Our group is engaged in creating an innovative system in which an X-band linac X-ray source and 12TW50fs laser technologies are applied to medical and nano-technical uses. As pioneers in medical physics for reliable and safe medical radiology, we hav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0502f9ee9b456cff1ac6b908a9c6a44a
https://doi.org/10.20965/ijat.2009.p0523
https://doi.org/10.20965/ijat.2009.p0523
Publikováno v:
Journal of the Vacuum Society of Japan. 52:441-447
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30d776cd35781c381c744dfd10b17c0a
https://doi.org/10.3131/jvsj2.52.441
https://doi.org/10.3131/jvsj2.52.441
Autor:
S. Masuda, M. Adachi, Kazuyoshi Koyama, Eisuke Miura, Mitsumori Tanimoto, T. Watanabe, Susumu Kato
Publikováno v:
International Journal of Modern Physics B. 21:391-397
An energy gain of the monoenergetic component of electrons γ were successfully increased to 25 MeV by decreasing an electron density ne to 4 × 1019 cm -3 and increasing a laser power PL to 4 TW. An empirical scaling law of the energy gain of γ ∝
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a465cb01e043ce932082bbe14eeb8b3
https://doi.org/10.1142/s0217979207042161
https://doi.org/10.1142/s0217979207042161