Zobrazeno 1 - 10
of 229
pro vyhledávání: '"Sami Tantawi"'
Autor:
James B. Rosenzweig, Gerard Andonian, Ronald Agustsson, Petr M. Anisimov, Aurora Araujo, Fabio Bosco, Martina Carillo, Enrica Chiadroni, Luca Giannessi, Zhirong Huang, Atsushi Fukasawa, Dongsung Kim, Sergey Kutsaev, Gerard Lawler, Zenghai Li, Nathan Majernik, Pratik Manwani, Jared Maxson, Janwei Miao, Mauro Migliorati, Andrea Mostacci, Pietro Musumeci, Alex Murokh, Emilio Nanni, Sean O’Tool, Luigi Palumbo, River Robles, Yusuke Sakai, Evgenya I. Simakov, Madison Singleton, Bruno Spataro, Jingyi Tang, Sami Tantawi, Oliver Williams, Haoran Xu, Monika Yadav
Publikováno v:
Instruments, Vol 8, Iss 1, p 19 (2024)
Recently, considerable work has been directed at the development of an ultracompact X-ray free-electron laser (UCXFEL) based on emerging techniques in high-field cryogenic acceleration, with attendant dramatic improvements in electron beam brightness
Externí odkaz:
https://doaj.org/article/187c8d61463d4bdc8fbc0e4923e0c5c4
Autor:
Gerard Emile Lawler, Fabio Bosco, Martina Carillo, Atsushi Fukasawa, Zenghai Li, Nathan Majernik, Yusuke Sakai, Sami Tantawi, Oliver Williams, Monika Yadav, James Rosenzweig
Publikováno v:
Instruments, Vol 8, Iss 1, p 14 (2024)
Future electron accelerator applications such as X-ray free electron lasers and colliders are dependent on significantly increasing beam brightness. With the observation that linac beam manipulation’s best preservation of max brightness is at the c
Externí odkaz:
https://doaj.org/article/9c20e6b1971f4bdcbb8cb0bc8daf8f85
Autor:
Asher Berlin, Raffaele Tito D’Agnolo, Sebastian A. R. Ellis, Christopher Nantista, Jeffrey Neilson, Philip Schuster, Sami Tantawi, Natalia Toro, Kevin Zhou
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-42 (2020)
Abstract We propose an approach to search for axion dark matter with a specially designed superconducting radio frequency cavity, targeting axions with masses m a ≲ 10 −6 eV. Our approach exploits axion-induced transitions between nearly degenera
Externí odkaz:
https://doaj.org/article/b9bc4e6289654592931f5e980b812ad4
Autor:
Samantha M. Lewis, Julian Merrick, Mohamed A. K. Othman, Andrew Haase, Sami Tantawi, Emilio A. Nanni
Publikováno v:
Physical Review Accelerators and Beams, Vol 25, Iss 12, p 121301 (2022)
We present the design, fabrication, and cold testing of a THz-driven field emission electron gun. The gun is designed as a two-cell standing-wave structure with a copper tip inserted halfway into the first cell that serves as the field emission sourc
Externí odkaz:
https://doaj.org/article/82630a9317aa4650939e6a145a454736
Autor:
Mamdouh Nasr, Emilio Nanni, Martin Breidenbach, Stephen Weathersby, Marco Oriunno, Sami Tantawi
Publikováno v:
Physical Review Accelerators and Beams, Vol 24, Iss 9, p 093201 (2021)
In this paper, we present an experimental demonstration of the high-gradient operation of an X-band, 11.424 GHz, 20-cells linear accelerator (linac) operating at a liquid nitrogen temperature of 77 K. The tested linac was previously processed and tes
Externí odkaz:
https://doaj.org/article/4d78f3bca5994d1aa5403655cadaff12
Publikováno v:
Physical Review Accelerators and Beams, Vol 23, Iss 9, p 092001 (2020)
We present a topology for linear accelerators (linacs) in which the power is distributed to the cavities through a waveguide with periodic apertures that guarantees the correct phases and amplitudes along the structure length. Unlike conventional tra
Externí odkaz:
https://doaj.org/article/6a74b0edb0cd4269b49740d8a75ef86b
Publikováno v:
Physical Review Accelerators and Beams, Vol 19, Iss 6, p 062002 (2016)
We present a novel method of reducing the footprint and increasing the efficiency of the modern multi-MW rf pulse compressor. This system utilizes a high power rf polarizer to couple two circular waveguide modes in quadrature to a single resonant cav
Externí odkaz:
https://doaj.org/article/061b598d087c4f619999af7d0b3be234
Publikováno v:
Physical Review Accelerators and Beams, Vol 19, Iss 6, p 062003 (2016)
A new design of dual circular polarizer is presented in this paper. This innovative design converts radiofrequency (rf) energy from TE10 mode in a rectangular waveguide to two polarized TE11 modes in a circular waveguide. A reflection less than −20
Externí odkaz:
https://doaj.org/article/dc8dfe68c25a413f8e03e14b6099050a
Autor:
Chen Xu, Sami Tantawi
Publikováno v:
Physical Review Accelerators and Beams, Vol 19, Iss 2, p 022002 (2016)
This paper explores a hybrid mode rf structure that served as a superconducting radio-frequency coupler. This application achieves a reflection S_{(1,1)} varying from 0 to −30 db and delivers cw power at 7 KW. The coupler has good thermal isolation
Externí odkaz:
https://doaj.org/article/e9cc64ae529c4a2195fa58a862e0b1fe
Autor:
Ziran Wu, Robert Joel England, Cho-Kuen Ng, Benjamin Cowan, Christopher McGuinness, Chunghun Lee, Minghao Qi, Sami Tantawi
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 17, Iss 8, p 081301 (2014)
Silicon woodpile photonic crystals provide a base structure with which to build a three-dimensional dielectric waveguide system for high-gradient laser-driven acceleration. To realize an on-chip woodpile laser accelerator, a key component is the powe
Externí odkaz:
https://doaj.org/article/fdbd6a5bdb32483ca3172dcdec36c43f