Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Q.S. Shu"'
Autor:
Guangfeng Cheng, Q.S. Shu, J.T. Susta, W.D. Moeller, T. Garvey, S. Einarson, D. Proch, D. Kostin, T.A. Treado
Publikováno v:
Physica C: Superconductivity. 441:229-232
More and more accelerators are built with superconducting cavities operating at cryogenic temperatures. A possible window failure might result in contamination of the cavity surface and degrade the accelerating performance. A cost effective design an
Autor:
David T. Rubin, R. Noer, A. Leibovich, J. Kirchgessner, J. Sears, W. Hartung, D. Moffat, Hasan Padamsee, Q.S. Shu
Publikováno v:
IEEE Transactions on Magnetics. 27:1935-1939
Heat treatment up to 1500 degrees C in an ultrahigh-vacuum furnace, along with processing of cavities and temperature mapping was used to suppress field emission and analyze emitter properties. In 27 tests of one-cell 1500-MHz fired accelerating cavi
Autor:
G. F. Cheng, P. Kneisel, I. Phipps, Ilan Ben-Zvi, Jeffrey C. Mast, R. Selim, G. Myneni, Q.S. Shu, J. Susta
Publikováno v:
2007 IEEE Particle Accelerator Conference (PAC).
The performance of superconducting RF cavities used in accelerators can be enhanced by detecting micro particles and inclusions which are the most serious source of performance degradation. These defects prevent the cavities from reaching the highest
Publikováno v:
2007 IEEE Particle Accelerator Conference (PAC).
There is an increasing demand for high beam current, high radio-frequency (RF) power S-band cavities in existing and new accelerator projects, such as for a study of future electron-ion collider (eRHIC) and a very brilliant, broadband, teraherz coher
Publikováno v:
2007 IEEE Particle Accelerator Conference (PAC).
In order to increase the protons energy up to 8 GeV in a driver Linac, the particles must be accelerated through various stages and three different power levels (25 kW, 100 kW and 210 kW) are required for the 325 MHz Fermilab Proton Driver couplers.
Autor:
D. Proch, J.T. Susta, S. Einarson, T.A. Treado, Q.S. Shu, W.D. Moeller, T. Garvey, Guangfeng Cheng
Publikováno v:
PAC 2005-Proceedings
Particle Accelerator Conference (PAC 05)
Particle Accelerator Conference (PAC 05), May 2005, Knoxville, United States. pp.3141
Particle Accelerator Conference (PAC 05)
Particle Accelerator Conference (PAC 05), May 2005, Knoxville, United States. pp.3141
Published online on JACoW; More and more, accelerators are built with superconducting cavities operating at cryogenic temperatures, and the probability of a ceramic window failure presents increasing problems because of the resulting contamination of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c63aa7acf2c2f26da57b55ca87dbfa6b
http://hal.in2p3.fr/in2p3-00025996
http://hal.in2p3.fr/in2p3-00025996
Autor:
J. Graber, J. Lawton, J. Kirchgessner, J. Sears, W. Hartung, David T. Rubin, D. Moffat, Hasan Padamsee, Q.S. Shu
Publikováno v:
Scopus-Elsevier
The main difficulty standing in the way of using superconducting RF cavities for teraelectronvolt linear colliders is that, due to field emission, accelerating gradients are generally limited to less than 20 MV/m. One technique which is commonly used
Autor:
David T. Rubin, J. Graber, D. Saranti, J. Kirchgessner, W. Hartung, Q.S. Shu, D. Moffat, Hasan Padamsee, J. Sears
Publikováno v:
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology.
An important step in simplifying superconducting accelerator structures is to reduce the number and complexity of the couplers. The use of azimuthal shaping to polarize the higher-order transverse modes in superconducting cavities has previously been
Autor:
D. Moffat, Hasan Padamsee, David T. Rubin, R. Noer, J. Sears, W. Hartung, J. Kirchgessner, Q.S. Shu, K. Gendreau
Publikováno v:
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology.
Systematic studies are in progress for understanding, controlling, and eliminating field emission (FE) in superconducting cavities so that higher gradients can be achieved for application of superconducting cavities to future linear colliders. In exp
Publikováno v:
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology.
The RF behavior of YBa/sub 2/Cu/sub 3/O/sub 7-x/ is being evaluated for its potential as a material used to make microwave cavities for particle accelerators. Single crystals and thin films are under study at 1.5 and 6 GHz. The best results have been