Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Alexander W. Chao"'
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 14, Iss 11, p 110702 (2011)
The mechanism of steady-state microbunching (SSMB) has been proposed [D. F. Ratner and A. W. Chao, Phys. Rev. Lett. 105, 154801 (2010)PRLTAO0031-900710.1103/PhysRevLett.105.154801] to produce steady-state microbunched beams by using laser modulations
Externí odkaz:
https://doaj.org/article/e6c63db981274dd1a3f5f6396dd87ee8
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 13, Iss 6, p 060701 (2010)
A single-pass high-gain x-ray free electron laser (FEL) calls for a high quality electron bunch. In particular, for a seeded FEL amplifier and for a harmonic generation FEL, the electron bunch initial energy profile uniformity is crucial for generati
Externí odkaz:
https://doaj.org/article/3c0e3eb53aee4bcdbb6ab8bb4b905baa
Autor:
Alexander W. Chao
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 12, Iss 10, p 104201 (2009)
Gravitational instability of the distribution of stars in a galaxy is a well-known phenomenon in astrophysics. This report is an attempt to analyze this phenomenon by applying standard tools developed in accelerator physics. It is found that a nonrot
Externí odkaz:
https://doaj.org/article/633084f19c1b477ea153f66116c836e9
Autor:
Richard Talman, Alexander W. Chao
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 12, Iss 8, p 084901 (2009)
A paper proving a result now commonly known as “Robinson sum rule” was published by Orlov and Tarasov {J. Exp. Theor. Phys. 34, 651 (1958)JTPHES1063-7761 [Sov. Phys. JETP 34, 339 (1958)]SPHJAR0038-5646} at about the same time that Robinson himsel
Externí odkaz:
https://doaj.org/article/0ba98a7e6277437987b9f9b6b468f329
Autor:
Alexander W. Chao
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 11, Iss 12, p 120005 (2008)
Externí odkaz:
https://doaj.org/article/ffdec6f52c0649f7a3b428d01913d527
Autor:
Samuel A Heifets, Alexander W. Chao
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 10, Iss 3, p 034402 (2007)
A general formalism for treating simultaneously the transverse coupled-bunch and transverse coupled-mode instabilities is presented. In this approach, the equations of motion of a coupled multibunch beam are expanded to yield a system of equations in
Externí odkaz:
https://doaj.org/article/bccb139301734195acc6531b3c677ab7
Autor:
Alexander W. Chao, Ernest D. Courant
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 10, Iss 1, p 014001 (2007)
As a polarized beam is accelerated through a depolarization resonance, its polarization is reduced by a well-defined calculable reduction factor. When the beam subsequently crosses a second resonance, the final beam polarization is considered to be r
Externí odkaz:
https://doaj.org/article/f47ac40273424c8aa0410b0b0a73236e
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 9, Iss 3, p 032801 (2006)
Linear dynamics in a storage ring can be described by the one-turn map matrix. In the case of a resonance where two of the eigenvalues of this matrix are degenerate, a coupling perturbation causes a mixing of the uncoupled eigenvectors. A perturbatio
Externí odkaz:
https://doaj.org/article/35df790812054f64af151557c3703b9e
Autor:
Alexander W. Chao
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 8, Iss 10, p 104001 (2005)
A matrix formalism is developed to describe the spin dynamics in a synchrotron near a single depolarization resonance as the particle energy (and therefore its spin precession frequency) is varied in a prescribed pattern as a function of time such as
Externí odkaz:
https://doaj.org/article/2e05d49e904045aeb694342a6c6b3c0c
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 7, Iss 7, p 071002 (2004)
We analyze the stop band due to crab cavities for horizontal tunes that are either close to integers or close to half integers. The latter case is relevant for today’s electron/positron colliders. We compare this stop band to that created by disper
Externí odkaz:
https://doaj.org/article/6303d8c2ada54f81b6b5892e2d778600