Transparent Spin Method for Spin Control of Hadron Beams in Colliders

Filatov, Yu. N.; Kondratenko, A. M.; Kondratenko, M. A.; Derbenev, Ya. S.; Morozov, Vasiliy

doi:10.1103/physrevlett.124.194801

Cited by 22 publications

(26 citation statements)

References 19 publications

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“…Let us consider the possibility of operating with polarized protons in a collider in the ST mode at an energy of the order of 10 TeV. For our estimates, we assume that the ST resonance strength is 0.01 at an energy of about 100 GeV, which is a typical value found earlier [7]. The resonance strength at 10 TeV is then of the order of a unit and about ten pairs of snakes are sufficient to provide stable manipulation of the proton polarization.…”

Section: St Mode At Ultra-high Energiesmentioning

confidence: 99%

“…SNs allow for adjusting any required spin direction n nav (z) at any orbital location as well as for setting the spin tune ν nav 1. The navigator spin field is the angular spin rotation velocity as a 3-vector, of a particle moving along the closed orbit [7] ω nav (z) = ν nav n nav (z).…”

Section: Spin Navigator Field: Stationary Casementioning

confidence: 99%

“…For stability of the spin dynamics, the spin effect of an SN must significantly exceed that of imperfections and misalignments of the synchrotron's magnetic elements as well as the impact of betatron and synchrotron oscillations. This means that the spin tune induced by an SN must significantly exceed the ST-resonance strength ω [7]…”

Section: Spin Navigator Field: Stationary Casementioning

confidence: 99%

“…The second part, the incoherent part of the ST resonance field ω emit , has to do with betatron and synchrotron particle oscillations and is proportional to the orbital beam emittances. In practice, the coherent part of the ST resonance strength ω coh significantly exceeds the strength of the incoherent part ω emit [7].…”

Section: Compensation Of the Coherent Part Of The St Resonance Strengthmentioning

confidence: 99%

“…The Spin Transparency (ST) mode in colliders allows for efficient control of the polarization direction of any kind of particles including deuterons [7]. It offers a new methodology for polarized beam experiments.…”

Section: Introductionmentioning

confidence: 99%

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Polarization control in spin-transparent hadron colliders by weak-field navigators involving lattice enhancement effect

Filatov

Kondratenko

et al. 2021

Eur. Phys. J. C

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Hadron polarization control schemes for Spin Transparent (ST) synchrotrons are analyzed. The spin dynamics and beam polarization in such synchrotrons are controlled by spin navigators (SN) which are special small insertions of weak magnetic fields. An SN stabilizes the beam polarization and allows for setting any desirable spin orientation at an interaction point in the operational regime, including a frequent spin flip. We present a general approach to design of SNs. We distinguish different types of SNs, namely, those not causing closed orbit perturbation as well as those producing local and global orbit distortions. In the second case, the concept of the spin response function in an ST synchrotron is applied and expanded to reveal the effect of the SN strength enhancement by magnetic lattice of the synchrotron. We provide conceptual schemes for SN designs using longitudinal and transverse magnetic fields allowing for polarization control at low as well as high energies. We also develop the ST concept for ultra-high energies. This development may enable and stimulate interest in polarized beam experiments in possible polarized collider projects such as Large Hadron Collider (LHC), Future Circular Collider (FCC) and Super Proton Proton Collider (SPPC).

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Section: St Mode At Ultra-high Energiesmentioning

confidence: 99%

Section: Spin Navigator Field: Stationary Casementioning

confidence: 99%

Section: Spin Navigator Field: Stationary Casementioning

confidence: 99%

Section: Compensation Of the Coherent Part Of The St Resonance Strengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Polarization control in spin-transparent hadron colliders by weak-field navigators involving lattice enhancement effect

Filatov

Kondratenko

et al. 2021

Eur. Phys. J. C

Self Cite

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High precision fundamental physics experiments using compact spin-transparent storage rings of low energy polarized electron beams

2023

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Numerical modeling of a proton spin-flipping system in the spin transparency mode at an integer spin resonance in JINR's Nuclotron

Filatov¹,

Kondratenko²,

Kondratenko³

et al. 2021

J. Inst.

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In this paper we propose a lattice insertion for the Nuclotron ring called a “spin navigator” that can adjust any direction of the proton polarization in the orbital plane using weak solenoids. The polarization control is realized in the spin transparency mode at the energy of 108 MeV, which corresponds to the integer spin resonance γ G = 2. The requirements on the navigator solenoid fields are specified considering the criteria for stability of the spin motion during any manipulation of the polarization direction in an experiment. The paper presents the results of numerical modeling of the proton spin dynamics in the Nuclotron ring operated in the spin transparency mode. The verified spin navigator is aimed at an experimental study of a spin-flipping system using the Nuclotron ring. The results are relevant to the NICA (JINR), EIC (BNL) and COSY (FZJ) facilities where the spin transparency mode can be applied for polarization control.

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Transparent Spin Method for Spin Control of Hadron Beams in Colliders

Cited by 22 publications

References 19 publications

Polarization control in spin-transparent hadron colliders by weak-field navigators involving lattice enhancement effect

Polarization control in spin-transparent hadron colliders by weak-field navigators involving lattice enhancement effect

High precision fundamental physics experiments using compact spin-transparent storage rings of low energy polarized electron beams

Numerical modeling of a proton spin-flipping system in the spin transparency mode at an integer spin resonance in JINR's Nuclotron

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