Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Robert Warnock"'
Autor:
Robert Warnock
Publikováno v:
Physical Review Accelerators and Beams, Vol 24, Iss 10, p 104402 (2021)
This paper continues the work of two previous treatments of bunch lengthening by a passive harmonic cavity in an electron storage ring. Such cavities, intended to reduce the effect of Touschek scattering, are a feature of fourth generation synchrotro
Externí odkaz:
https://doaj.org/article/51929d8de71043e881f0e19283616112
Autor:
Robert Warnock
Publikováno v:
Physical Review Accelerators and Beams, Vol 24, Iss 2, p 024401 (2021)
A higher harmonic cavity (HHC), used to cause bunch lengthening for an increase in the Touschek lifetime, is a feature of several fourth generation synchrotron light sources. The desired bunch lengthening is complicated by the presence of required ga
Externí odkaz:
https://doaj.org/article/83f29b254ffe45d083eaefdd7839560f
Autor:
Robert Warnock, Marco Venturini
Publikováno v:
Physical Review Accelerators and Beams, Vol 23, Iss 6, p 064403 (2020)
We study the effect of a passive harmonic cavity, introduced to cause bunch lengthening, in an electron storage ring. We derive a formula for the induced voltage from such a cavity with high Q, excited by a sequence of bunches, allowing for arbitrary
Externí odkaz:
https://doaj.org/article/c2b4e708e8a44e9f8a9e9093d3af7d72
Autor:
Robert Warnock, Karl Bane
Publikováno v:
Physical Review Accelerators and Beams, Vol 21, Iss 12, p 124401 (2018)
The longitudinal charge density of an electron beam in its equilibrium state is given by the solution of the Haïssinski equation, which provides a stationary solution of the Vlasov-Fokker-Planck equation. The physical input is the longitudinal wake
Externí odkaz:
https://doaj.org/article/b65bf0b1049c4bc79589468e87dddda4
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 13, Iss 10, p 104403 (2010)
In self-consistent modeling of many-particle systems it is convenient to solve the Maxwell equations for self-fields in coordinates based in the laboratory with time as the evolution variable, but conventional and also convenient to follow particle m
Externí odkaz:
https://doaj.org/article/e2ead79b4d25400cb70784f2c8db60c3
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 12, Iss 8, p 080704 (2009)
We study the microbunching instability in a bunch compressor by a parallel code with some improved numerical algorithms. The two-dimensional charge/current distribution is represented by a Fourier series, with coefficients determined through Monte Ca
Externí odkaz:
https://doaj.org/article/0d890ff4d86743fcae02e517e42d203f
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 10, Iss 5, p 054403 (2007)
Direct numerical methods for solving the Vlasov equation offer some advantages over macroparticle simulations, as they do not suffer from the consequences of the statistical fluctuations inherent in using a number of macroparticles smaller than the b
Externí odkaz:
https://doaj.org/article/97e88c31971b457eb644b19a0d4146b9
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 8, Iss 1, p 014402 (2005)
We are concerned with coherent longitudinal motion in a storage ring, especially with situations in which coherent synchrotron radiation (CSR) can influence stability of the beam. The collective force from CSR is usually described by an impedance or
Externí odkaz:
https://doaj.org/article/b0a75d4e93144a77870d786b69f15bb6
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 8, Iss 1, p 014202 (2005)
We examine the effect of the collective force due to coherent synchrotron radiation (CSR) in an electron storage ring with small bending radius. In a computation based on time-domain integration of the nonlinear Vlasov equation, we find the threshold
Externí odkaz:
https://doaj.org/article/1f67bba9a3174187bc4bdf3a1f250db1
Autor:
Robert Warnock
Publikováno v:
Electromagnetics. 39:281-324
This is a translation of a classic paper of Arnold Sommerfeld published in 1899. It provided the first rigorous theory of waves traveling on a resistive wire of finite radius. General solutions ins...