Abstract
We present a review of the possibilities to conduct experiments of high efficiency in the nuclear and high energy physics with spin-polarized beams in a collider complex, configuration of which includes Siberian snakes or figure-8 collider ring. Special attention is given to the recently elicited advantageous possibility to conduct high precision experiments in a regime of the spin transparency (ST) when the design global spin tune is close to zero. In this regime, the polarization control is realized by use of spin navigators (SN), which are compact special insertions of magnets dedicated to a high flexibility spin manipulation including frequent spin flips.
Highlights
Experiments with polarized beams have been and remain a crucial tool in understanding particle and nuclear structure and reactions from the first principles [1]
Based on earlier established methods and concepts of the coherent spin preservation and control such as Siberian Snakes (SibS) [10] and Figure-8 synchrotrons (F8S) [11,12], here we mainly focus on the newly discovered possibilities of further enhancing the flexibility and precision strength of the polarized beams operation in colliders, which we call the spin transparency (ST) [13]
It follows from the definition of this form as a dynamical invariant that the vector function n(p, r, t) taken along the particle trajectory should satisfy the TBMT equation, i.e., it should be a special solution of Equation (5), which is expressed as a unique function of the orbital variables
Summary
Experiments with polarized beams have been and remain a crucial tool in understanding particle and nuclear structure and reactions from the first principles [1]. During the preceding period (starting in the 20th century) associated crucially with the arriving and setting of quantum mechanics, electrodynamics (QED) and atomic and nuclear physics, a fundamental role of spin as an intrinsic feature of the subatomic particles has been elicited through numerous series of critical observations, measurements and breakthroughs in the theory and experiments. Lighting up this heroic era should complement our review of the accelerator problematics, adding the related material would make the paper volume much bigger. Acquainting with his remarkable article would benefit a reader with more complete perception of history and destinies of the spin physics, so we recommend it to the reader
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