Author: Kaoru YokoyaPublisher:
ISBN:
Category :
Languages : de
Pages : 42
Book Description
Cumulative beam breakup in large scale linacs
Author: Kaoru YokoyaCumulative Beam Breakup in Radio-frequency Linacs
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
An analytic model of cumulative beam breakup has been developed which is applicable to both low-velocity ion and high-energy electron linear accelerators. The model includes arbitrary velocity, acceleration, focusing, initial conditions, beam-cavity resonances, and variable cavity geometry and spacing along the accelerator. The model involves a continuum approximation'' in which the transverse kicks in momentum imparted by the cavities are smoothed over the length of the linac. The resulting equation of transverse motion is solved via the WKBJ method. Specific examples are discussed which correspond to limiting cases of the solution. 16 refs.
Cumulative Beam Breakup in Radio-frequency Linacs
Author: C.L. BohnPhysics of Intensity Dependent Beam Instabilities
Author: King-Yuen NgPublisher: World Scientific
ISBN: 9812563423
Category : Science
Languages : en
Pages : 798
Book Description
This book provides a comprehensive treatment of intensity dependent particle beam instabilities in accelerating rings. Written for researchers, the material is also suitable for use as a textbook in an advanced graduate course for students studying accelerator physics.The presentation starts with a brief review of the basic concept of wake potentials and coupling impedances in the vacuum chamber followed by a discussion on static and dynamic solutions of their effects on the particle beams. Special emphasis is placed separately on proton and electron machines. Other special topics of interest covered include Landau damping, Balakin-Novokhatsky-Smirnov damping, Sacherer's integral equations, Landau cavity, saw-tooth instability, Robinson stability criteria, beam loading, transition crossing, two-stream instabilities, and collective instability issues of isochronous rings. After the formulation of an instability, readers are provided a thorough description of one or more experimental observations together with a discussion of the cures for the instability.Although the book is theory oriented, the use of mathematics has been minimized. The presentation is intended to be rigorous and self-contained with nearly all the formulas and equations derived.
Investigations of Cumulative Beam Breakup in Radio-frequency Linacs
Author: Application of Theory of Cumulative Beam Breakup in Linacs to Transverse Instabilities in Storage Rings
Author: Robert L. GlucksternCumulative Beam Breakup in Linear Accelerators with Time-dependent Parameters
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A formalism presented in a previous paper for the analysis of cumulative beam breakup (BBU) with arbitrary time dependence of the beam current and with misalignment of the cavities and focusing elements [J.R. Delayen, Phys. Rev. ST Accel. Beams 6, 084402 (2003)] is extended to include time dependence of the focusing and coupling between the beam and the dipole modes. Such time dependence, which could result from an energy chirp imposed on the beam or from rf focusing, is known to be effective in reducing BBU-induced instabilities and emittance growth. The analytical results are presented and applied to practical accelerator configurations and compared to numerical simulations.
Cumulative Beam Breakup in Linear Accelerators with Arbitrary Beam Current Profile
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
An analytical formalism for the solution of cumulative beam breakup in linear accelerators with arbitrary time dependence of beam current is presented, and a closed-form expression for the time and position dependence of the transverse displacement is obtained. It is applied to the behavior of single bunches and to the steady state and transient behavior of dc beams and beams composed of point-like and finite length bunches. This formalism is also applied to the problem of cumulative beam breakup in the presence of random displacement of cavities and focusing elements, and a general solution is presented.
Physics And Experiments With Linear Colliders (In 2 Vols)
Author: P EerolaPublisher: World Scientific
ISBN: 9814554596
Category :
Languages : en
Pages : 876
Book Description
This workshop brought together for the first time accelerator experts as well as experimental and theoretical high energy physicists from all over the world to consider the physics potential of high energy linear electron-positron colliders. A wide variety of physics cases were presented ranging from precision tests of the top quark and electroweak gauge bosons to searches of the intermediate mass Higgs bosons and supersymmetric particles.
Cumulative Beam Breakup in Linear Accelerators with Random Displacement of Cavities and Focusing Elements
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A formalism presented in a previous paper for the analysis of cumulative beam breakup with arbitrary time dependence of the beam current [J.R. Delayen, Phys. Rev. ST Accel Beams 6, 084402 (2003)] is applied to the problem of beam breakup in the presence of random displacements of cavities and focusing elements. A closed-form solution is obtained and is applied to the behavior of a single bunch and to the steady-state and transient behavior of dc beams and beams composed of point-like bunches.