Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Masaru Sawamura"'
Autor:
Hiroshi Sakai, Enrico Cenni, Kazuhiro Enami, Takaaki Furuya, Masaru Sawamura, Kenji Shinoe, Kensei Umemori
Publikováno v:
Physical Review Accelerators and Beams, Vol 22, Iss 2, p 022002 (2019)
Field emission is one of the most serious issues in the degradation of superconducting cavity performance. However, surveying field emission sources during the cavity performance test (called the “vertical test”) and cryomodule operation is diffi
Externí odkaz:
https://doaj.org/article/b9f61a3ae9514a378c670171f0d3d40f
Autor:
Masaru, Sawamura, Ryoichi, Hajima
スポーク空洞は、同じ周波数ならば楕円空洞よりサイズが小さく、パッキングファクターも優れるという利点がある。LCS-γ/X線源を産業・学術分野への利用を図るため、ERL 加速器を小型
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::f56725025c1bbd1a0c5176fbd591464f
https://repo.qst.go.jp/records/83209
https://repo.qst.go.jp/records/83209
Autor:
Yasunori Tanimoto, K. Endo, Ryota Takai, H. Matsushita, Eiji Kako, Kentaro Harada, Kenji Hosoyama, Kota Nakanishi, Seiji Asaoka, Shuichi Noguchi, Ken Watanabe, Feng Qiu, Yuuji Kojima, Enrico Cenni, Kazufumi Hara, Kaiichi Haga, Masao Kuriki, Yosuke Honda, Hiromitsu Nakajima, Teruya Honma, Yukinori Kobayashi, Shinichiro Michizono, Ryoichi Hajima, Kazuhiro Enami, Tatsuya Kume, Shigeki Fukuda, Hirotaka Nakai, K. Umemori, Masaru Sawamura, Kotaro Satoh, M. Tadano, Mitsuo Akemoto, Hidenori Sagehashi, Hiroshi Matsumura, Hiroshi Kawata, Takako Miura, Shinichi Sasaki, Toshio Shishido, Takaaki Furuya, Masato Egi, Tateru Takenaka, Hiroshi Sakai, Kenji Shinoe, Y. Kondou, Tohru Honda, Miho Shimada, Hiroaki Katagiri, Takashi Nogami, Akira Ueda, Takashi Uchiyama, Norio Nakamura, Tsukasa Miyajima, Dai Arakawa, Shinya Nagahashi, Shogo Sakanaka, Takashi Obina, Takeshi Takahashi, Olga Tanaka, Masahiro Yamamoto, Kazuyuki Nigorikawa, Nobuyuki Nishimori, Ryoji Nagai
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 877:197-219
Energy-recovery linacs (ERLs) are promising for advanced synchrotron light sources, high-power free electron lasers (FELs), high-brightness gamma-ray sources , and electron–ion colliders. To demonstrate the critical technology of ERL-based light so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1952effdd5de9bc5fae9a38c16bee59
https://doi.org/10.1016/j.nima.2017.08.051
https://doi.org/10.1016/j.nima.2017.08.051
Autor:
K. Umemori, Masaru Sawamura, Kenji Shinoe, Kazuhiro Enami, Hiroshi Sakai, Takaaki Furuya, Enrico Cenni
Publikováno v:
Physical Review Accelerators and Beams, Vol 22, Iss 2, p 022002 (2019)
Field emission is one of the most serious issues in the degradation of superconducting cavity performance. However, surveying field emission sources during the cavity performance test (called the ``vertical test'') and cryomodule operation is difficu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37ed19ba3516ce922a0ed7989166c70c
https://doi.org/10.1103/physrevaccelbeams.22.022002
https://doi.org/10.1103/physrevaccelbeams.22.022002
Publikováno v:
Particles
Volume 1
Issue 1
Volume 1
Issue 1
We have developed a photocathode dc gun for a compact Smith-Purcell free-electron laser in the terahertz wavelength region. The gun system consists of an alkali antimonide photocathode preparation chamber, a dc gun with a 250 kV-50 mA Cockcroft-Walto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e599033563137cabc210e7144f055d07
Autor:
Hiroshi Matsumura, Kaiichi Haga, Masaru Sawamura, Akihiro Toyoda, Hajime Nakamura, Shogo Sakanaka, Hiroshi Sakai, Takaaki Furuya, K. Umemori, Kenji Shinoe, Enrico Cenni, Ken-ichi Hozumi, Kazuhiro Enami
Publikováno v:
EPJ Web of Conferences, Vol 153, p 07011 (2017)
The field emission electron currents from the main superconducting cavities (Cavities #3 and #4) of compact ERL at KEK, Japan, were estimated indirectly from photon dose rates measured around the cavities and on the roof of the compact ERL room. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d959d2534745ffdcf02c07376405e37
https://doaj.org/article/89e2ac6cc1de4bb6b7302c10d4b501e8
https://doaj.org/article/89e2ac6cc1de4bb6b7302c10d4b501e8
Autor:
T. Shizuma, Ryoichi Hajima, Nobuyuki Nishimori, Ryoji Nagai, Atsushi Kosuge, Michio Seya, C. T. Angell, Shunya Matsuba, Takehito Hayakawa, Masaru Sawamura, Michiaki Mori
Publikováno v:
The European Physical Journal Special Topics. 223:1229-1236
Generation of energy-tunable gamma-rays via Laser Compton Scattering is of great interest for scientific studies and applications of “MeV” photons which interact with nuclei. One of the promising applications of such energy-tunable gamma-rays is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b52cac6a7dfa2df1c7aeb5ab37d1ea7e
https://doi.org/10.1140/epjst/e2014-02177-y
https://doi.org/10.1140/epjst/e2014-02177-y
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 528:231-234
The optical resonator geometry of the JAERI ERL-FEL is optimized to ensure high-power operation. The FEL power strongly depends on the performance of the optical resonator including output efficiency, round-trip loss, and interaction mode volume. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::263538234996e53b6ba3cb4ef4672f19
https://doi.org/10.1016/j.nima.2004.04.053
https://doi.org/10.1016/j.nima.2004.04.053
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 483:129-133
An intense ultrashort optical pulse has been quasi-continuously generated using a superconducting RF linac-based free-electron laser at a wavelength of 22.5 μm. The pulse shape and width are measured by second-order optical autocorrelation with a bi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f714684c326b9de06d841ff91464431
https://doi.org/10.1016/s0168-9002(02)00297-8
https://doi.org/10.1016/s0168-9002(02)00297-8
Autor:
Ryoichi Hajima, Eisuke Minehara, T. Shizuma, Masaru Sawamura, N. Nishimori, Nobuhiro Kikuzawa, R. Nagai
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 475:519-523
The performance of an optical resonator featuring an insertable scraper output coupler was evaluated for the JAERI far-infrared free-electron laser. An efficiency factor of the resonator was introduced for evaluation. The efficiency factor was derive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::678d1806378474eb1eb0d76a0bfd8c07
https://doi.org/10.1016/s0168-9002(01)01600-x
https://doi.org/10.1016/s0168-9002(01)01600-x