15 citations · 34 across the 13 of their papers we have counts for
12 papers · 1 filter
Elaboration on the kinetic approach of Derbenev and Kondratenko to spin-polarized beams in electron storage rings
Klaus Heinemann, Dan T. Abell, Jose Agudelo +7
We present a detailed account of the kinetic approach for describing the effect of synchrotron radiation on electron and positron spin polarization in storage rings. This approach…
Temporal X-ray Reconstruction using Temporal and Spectral Measurements at LCLS
Florian Christie, Alberto Andrea Lutman, Yuantao Ding +7
Transverse deflecting structures (TDS) are widely used in accelerator physics to measure the longitudinal density of particle bunches. When used in combination with a dispersive se…
Confining continuous manipulations of accelerator beamline optics
Philipp Amstutz, Sven Ackermann, Jörn Bödewadt +3
Altering the optics in one section of a linear accelerator beamline will in general cause an alteration of the optics in all downstream sections. In circular accelerators, changing…
An Informal Summary of a New Formalism for Classifying Spin-Orbit Systems Using Tools Distilled from the Theory of Bundles
Klaus Heinemann, Desmond P. Barber, James A. Ellison +1
We give an informal summary of ongoing work which uses tools distilled from the theory of fibre bundles to classify and connect invariant fields associated with spin motion in stor…
A detailed and unified treatment of spin-orbit systems using tools distilled from the theory of bundles
Klaus Heinemann, Desmond P. Barber, James A. Ellison +1
We return to our study \cite{BEH} of invariant spin fields and spin tunes for polarized beams in storage rings but in contrast to the continuous-time treatment in \cite{BEH}, we no…
A New and Unifying Approach to Spin Dynamics and Beam Polarization in Storage Rings
Klaus Heinemann, James A. Ellison, Desmond P. Barber +1
With this paper we extend our studies [1] on polarized beams by distilling tools from the theory of principal bundles. Four major theorems are presented, one which ties invariant f…
Planar undulator motion excited by a fixed traveling wave: Quasiperiodic Averaging, normal forms and the FEL Pendulum
James A. Ellison, Klaus Heinemann, Mathias Vogt +1
We present a mathematical analysis of planar motion of energetic electrons moving through a planar dipole undulator, excited by a fixed planar polarized plane wave Maxwell field in…
A New Model for the Collective Beam-Beam Interaction
J. A. Ellison, A. V. Sobol, M Vogt
The Collective Beam-Beam interaction is studied in the framework of maps with a ``kick-lattice'' model in the 4-D phase space of the transverse motion. A novel approach to the clas…
Spin tune in the single resonance model with a pair of Siberian Snakes
D. P. Barber, R. Jaganathan, M. Vogt
Snake ``resonances'' are classified in terms of the invariant spin field and the amplitude dependent spin tune. Exactly at snake ``resonance'' there is no continuous invariant spin…
Strength of Higher-Order Spin-Orbit Resonances
Georg H. Hoffstaetter, Mathias Vogt
When polarized particles are accelerated in a synchrotron, the spin precession can be periodically driven by Fourier components of the electromagnetic fields through which the part…
First-Order Averaging Principles for Maps with Applications to Beam Dynamics in Particle Accelerators
Scott Dumas, James A. Ellison, Mathias Vogt
For slowly evolving, discrete-time-dependent systems of difference equations (iterated maps), we believe the simplest means of demonstrating the validity of the averaging method at…
III. The Permissible Equilibrium Polarisation Distribution in a Stored Proton Beam
D. P. Barber, K. Heinemann, G. H. Hoffstaetter +1
We illustrate the use of the invariant spin field for describing permissible equilibrium spin distributions in high energy spin polarised proton beams.}