Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Motoaki Sawabe"'
Autor:
Vijay Chouhan, Shigeki Kato, Keisuke Nii, Takanori Yamaguchi, Motoaki Sawabe, Takayuki Saeki, Hideaki Monjushiro, Hiroki Oikawa, Hayato Ito, Hitoshi Hayano, Yoshiaki Ida
Publikováno v:
Physical Review Accelerators and Beams, Vol 22, Iss 10, p 103101 (2019)
Electropolishing (EP) is a standard process for the treatment of the interior surface of niobium (Nb) superconducting radio-frequency (SRF) cavities used in particle accelerators. We previously conducted a study on vertical electropolishing (VEP), in
Externí odkaz:
https://doaj.org/article/fa07898ed01d4d9989aeda3f35eb1028
Autor:
Vijay Chouhan, Shigeki Kato, Keisuke Nii, Takanori Yamaguchi, Motoaki Sawabe, Hitoshi Hayano, Yoshiaki Ida
Publikováno v:
Physical Review Accelerators and Beams, Vol 20, Iss 8, p 083502 (2017)
A detailed study on vertical electropolishing (VEP) of a 1.3-GHz single-cell niobium coupon cavity, which contains six coupons and four viewports at different positions, is reported. The cavity was vertically electropolished using a conventional rod
Externí odkaz:
https://doaj.org/article/01a9324ec0e041fa910abc9935a6ef41
Autor:
Xin Zhao, Rong-Li Geng, P. V. Tyagi, Hitoshi Hayano, Shigeki Kato, Michiru Nishiwaki, Takayuki Saeki, Motoaki Sawabe
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 13, Iss 12, p 124702 (2010)
We report the results of surface characterizations of niobium (Nb) samples electropolished together with a single cell superconducting radio-frequency accelerator cavity. These witness samples were located in three regions of the cavity, namely at th
Externí odkaz:
https://doaj.org/article/8a77b418b5424b109335d2ad1c6c5652
Autor:
Puneet Tyagi, T. Noguchi, Hitoshi Hayano, Motoaki Sawabe, Takayuki Saeki, Shigeki Kato, Michiru Nishiwaki
Publikováno v:
Applied Surface Science. 285:778-782
We report the effect of different current densities on sulfur generation at Nb surface in the electropolishing (EP) with aged electrolyte. In this regard, we conducted a series of electropolishing (EP) experiments in aged EP electrolyte with high (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6ee0aa3546cffa24b216f6c35349d51
https://doi.org/10.1016/j.apsusc.2013.08.127
https://doi.org/10.1016/j.apsusc.2013.08.127
Autor:
Motoaki Sawabe, T. Noguchi, Puneet Tyagi, Michiru Nishiwaki, Takayuki Saeki, Hitoshi Hayano, Shigeki Kato
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 28:634-638
The performance of superconducting radio frequency niobium cavities is sometimes limited by contaminations present on the cavity surface. In the recent years extensive research has been done to enhance the cavity performance by applying improved surf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0570766017437a7d6c383d9702445dcf
https://doi.org/10.1116/1.3382312
https://doi.org/10.1116/1.3382312
Publikováno v:
Analytical Sciences. 21:629-634
A reliable and convenient system to generate accurate and stable standard gas mixtures of various atmospheric compounds at parts-per-billion levels has been developed. The system is of simple design; the generator is a coil consisting of an inner tub
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00d0485e2a335ddaff0b254acf7beef2
https://doi.org/10.2116/analsci.21.629
https://doi.org/10.2116/analsci.21.629
Autor:
Kenji Ueno, Shinichiro Michizono, Masahiro Yamamoto, Satoru Yamashita, Michiru Nishiwaki, Motoaki Sawabe, Yukihide Kamiya, Atsushi Enomoto, Y. Funahashi, Takaaki Furuya, Nao Higashi, Hiroshi Sakai, Masao Kuriki
Publikováno v:
Proceedings of the 12th Asia Pacific Physics Conference (APPC12).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d66190f9b9292334a9173c4492eef14
https://doi.org/10.7566/jpscp.1.014023
https://doi.org/10.7566/jpscp.1.014023
Autor:
Hitoshi Hayano, Takayuki Saeki, Motoaki Sawabe, Shigeki Kato, Rong Li Geng, Puneet Tyagi, Xin Zhao, Michiru Nishiwaki
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 13, Iss 12, p 124702 (2010)
We report the results of surface characterizations of niobium (Nb) samples electropolished together with a single cell superconducting radio-frequency accelerator cavity. These witness samples were located in three regions of the cavity, namely at th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90cb627607be3626bc96c72a26befbc6
https://doi.org/10.1103/physrevstab.13.124702
https://doi.org/10.1103/physrevstab.13.124702