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Radiative polarization of electrons in storage rings
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TLDR
In this article, the probability of a radiative transition in a magnetic field with spin flip was investigated, including the case of a non-uniform magnetic field, and means of suppressing these effects and also of intentional depolarization of a beam were pointed out.Abstract:
Polarization of electrons arising as the result of radiation during extended motion in a magnetic field is considered. A calculation is made with the quasiclassical operator method of the probability of a radiative transition in a magnetic field with spin flip, including the case of a nonuniform magnetic field. The kinetic equation is obtained for polarization of electrons in an external field with inclusion of radiation effects, and this is used to analyze the kinetics of radiative polarization. Effects are discussed which lead to depolarization of an electron beam in motion in a nonuniform magnetic field, and means of suppressing these effects and also of intentional depolarization of a beam are pointed out. Means are discussed for measurement of the transverse polarization of high energy electrons, and a description is given of an experiment in which the first indication of the existence of the radiative polarization effect has been obtained.read more
Citations
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Spin-polarized charged particle beams in high-energy accelerators
TL;DR: In this paper, a comprehensive survey of spin-polarized beams in high-energy particle accelerators is presented, including work from a number of institutions, including high-and medium-energy facilities, synchrotron light sources and muon storage rings.
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Ultrarelativistic Electron-Beam Polarization in Single-Shot Interaction with an Ultraintense Laser Pulse
Yan-Fei Li,Rashid Shaisultanov,Karen Zaven Hatsagortsyan,Feng Wan,Christoph H. Keitel,Jian-Xing Li +5 more
TL;DR: A Monte Carlo method is developed to model electron radiative spin effects in arbitrary electromagnetic fields by employing spin-resolved radiation probabilities in the local constant field approximation and demonstrates a way for relativistic electron beam polarization with currently achievable laser facilities.
Journal ArticleDOI
e+e- physics at petra—the first five years
TL;DR: The PETRA (Positron-Electron T andem Ring Accelerator) is located at DESY in Hamburg, Germany, and is the highest energy electron-positron storage ring in the world as discussed by the authors.
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Modern and Future Colliders
TL;DR: The field of colliders remains extremely dynamic and continues to develop many innovative approaches as mentioned in this paper, and several novel concepts are currently being considered for designing and constructing even more powerful future colliders.
Journal ArticleDOI
Advances in QED with intense background fields
A A Fedotov,Anton Ilderton,Felix Karbstein,Ben King,Daniel Seipt,Hidetoshi Taya,Greger Torgrimsson +6 more
TL;DR: In this paper , the authors review the advances made during the last decade, with a focus on theory and phenomenology, to account for non-perturbative physics (e.g. the Schwinger effect), with extreme intensities requiring resummation of the loop expansion.
References
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Journal ArticleDOI
On gauge invariance and vacuum polarization
TL;DR: In this paper, it was shown that the extraction of gauge invariants from a formally gauge invariant theory is ensured if one employs methods of solution that involve only gauge covariant quantities.
Journal ArticleDOI
Precession of the Polarization of Particles Moving in a Homogeneous Electromagnetic Field
TL;DR: In this article, the precession of a particle moving in a homogeneous electromagnetic field has been investigated for spin ½ particles in some particular cases and the results were derived by explicit use of the Dirac equation with the occasional inclusion of a Pauli term to account for an anomalous magnetic moment.
Journal ArticleDOI
Photon and electron polarization in high-energy bremsstrahlung and pair production with screening
Haakon Olsen,L. C. Maximon +1 more
TL;DR: In this article, a matrix element for high-energy bremsstrahlung and pair production involving arbitrarily polarized photons and electrons has been calculated and the Coulomb and screening effects are taken into account exactly.
Journal ArticleDOI
Lifetime and Beam Size in a Storage Ring
C. Bernardini,G. F. Corazza,G. Di Giugno,G. Ghigo,J. Haissinski,P. Marin,R. Querzoli,B. Touschek +7 more
TL;DR: In this paper, a lifetime of 50 hours was reported for a small number of stored electrons, corresponding to residual air pressure of approximates 5 x 10/sup -10/ Torr, and the lifetime depends on the number of electrons in the beam.