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pro vyhledávání: '"R.L. Geng"'
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Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 842:92-95
The use of non-evaporable getter (NEG) pumps in particle accelerators has increased significantly over the past few years because of their large pumping speed, particularly for hydrogen, compared to the size of the pump. A concern about using such pu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af9ab4ccebf5c46598a2e9ba406aea78
https://doi.org/10.1016/j.nima.2016.10.048
https://doi.org/10.1016/j.nima.2016.10.048
Publikováno v:
Physical Review Accelerators and Beams, Vol 19, Iss 8, p 082001 (2016)
Recent studies by Romanenko et al. revealed that cooling down a superconducting cavity under a large spatial temperature gradient decreases the amount of trapped flux and leads to reduction of the residual surface resistance. In the present paper, th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9620a76e12bb7981c29e38a8aead93e5
https://doaj.org/article/e2ea52ed76704601ba876ec2bd55fc63
https://doaj.org/article/e2ea52ed76704601ba876ec2bd55fc63
Autor:
Song Jin, R.L. Geng, Kui Zhao, Baocheng Zhang, Fang Wang, Xiangyang Lu, Dai Jing, Wencan Xu, Feisi He, Shengwen Quan, Jiankui Hao, Kexin Liu, Feng Zhu, Lin Lin
Publikováno v:
Chinese Physics C. 36:156-159
The RF performance of a 1.3 GHz 9-cell superconducting niobium cavity was evaluated at cryogenic temperatures following surface processing by using the standard ILC-style recipe. The cavity is a TESLA-style 9-cell superconducting niobium cavity, with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a7ddec96deaf6c1f5960ef76d449b1d
https://doi.org/10.1088/1674-1137/36/2/010
https://doi.org/10.1088/1674-1137/36/2/010
Autor:
K. Wilson Elliott, Brian Bures, Jason D. Wright, R.L. Geng, K. Seo, Charles Reece, Mahadevan Krishnan, A. Gerhan, Anne-Marie Valente-Feliciano, Chen Xu, Larry Phillips, R. Crooks, Xin Zhao
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 27:620-625
This article presents evidence for unprecedented, large crystal grain size in ∼1μm thick Nb films that were grown on sapphire and copper substrates using a vacuum arc process called coaxial energetic deposition CED™. Most other deposition techni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f51938ad7be0ecfbce4ca2fa219e5583
https://doi.org/10.1116/1.3131725
https://doi.org/10.1116/1.3131725
Autor:
R.L. Geng
Publikováno v:
Physica C: Superconductivity. 441:145-150
High-gradient superconducting RF (SRF) cavities are needed for energy frontier superconducting accelerators. Progress has been made over the past decades and the accelerating gradient Eacc has been increased from a few MV/m to ∼42 MV/m in SRF niobi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6646d8454d780aabea35614a9c2c663b
https://doi.org/10.1016/j.physc.2006.03.029
https://doi.org/10.1016/j.physc.2006.03.029
Autor:
R.L. Geng, Sergey Belomestnykh, Philippe Goudket, D. M. Dykes, Richard G. Carter, Hasan Padamsee
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 538:189-205
Multipacting induced discharge in a rectangular waveguide is studied experimentally at a RF frequency of 500 MHz. The waveguide has a cross-section of 457 mm by 102 mm. The maximum forward RF power is 600 and 300 kW in traveling and standing wave mod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f39377619ad718693e424a0ac917064
https://doi.org/10.1016/j.nima.2004.09.014
https://doi.org/10.1016/j.nima.2004.09.014
Autor:
Richard G. Carter, R.L. Geng, D. M. Dykes, Sergey Belomestnykh, Hasan Padamsee, Philippe Goudket
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 508:227-238
Although a rectangular waveguide coupler has the conceptual advantages of simplicity and capability of withstanding higher power, builders of modern superconducting accelerators are routinely choosing instead a coaxial coupler for its proven performa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff07ca0f887318ca23011e2343accebe
https://doi.org/10.1016/s0168-9002(03)01660-7
https://doi.org/10.1016/s0168-9002(03)01660-7
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 496:1-7
The shape of TESLA accelerating structure can be improved to decrease the peak surface magnetic field by sacrificing and increasing peak surface electric field. This sacrifice may be necessary because the magnetic field is a hard limit but electric f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a08ee01b987b3a99b53d3a1d88a694a
https://doi.org/10.1016/s0168-9002(02)01620-0
https://doi.org/10.1016/s0168-9002(02)01620-0
Akademický článek
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