Impact of three-dimensional polarization profiles on spin-dependent measurements in colliding beam experiments

Fischer, W.; Bazilevsky, A.

doi:10.1103/physrevstab.15.041001

Cited by 9 publications

(9 citation statements)

References 6 publications

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“…. This characteristic of colliding beams is defined as the product of the experiment's luminosity L and of the two particle polarizations P 1 and P 2 squared: FOM = LP 2 1 P 2 2 [16]. This parameter quantifies the overall performance of a polarized beam experiments involving collisions of two polarized particles, such as polarized beam collider experiments and experiments with a polarized beam on a polarized target.…”

Section: Figure Of Merit (Fom)mentioning

confidence: 99%

Siberian Snakes, Figure-8 and Spin Transparency Techniques for High Precision Experiments with Polarized Hadron Beams in Colliders

et al. 2021

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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.

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Section: Figure Of Merit (Fom)mentioning

confidence: 99%

Siberian Snakes, Figure-8 and Spin Transparency Techniques for High Precision Experiments with Polarized Hadron Beams in Colliders

et al. 2021

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“…With dual partial snakes in the AGS, the residual small polarization loss is believed due to only intrinsic depolarizing resonances, which is reflected in the development of polarization profiles. Assuming the polarization profile is similar to beam as Gaussian distribution, the ratio R is given as R = (σ beam /σ pol ) 2 [7]. From the measurements done in AGS, the ratio R ∼ 0.1 at flattop for the typical running 2 × 10 11 bunch intensity.…”

Section: Ags Polarimetermentioning

confidence: 99%

AGS P-carbon CNI polarimeter Operation Experience

Huang¹,

Poblaguev²,

Steski³

et al. 2018

Proceedings of XVII International Workshop on Polarized Sources, Targets &Amp; Polarimetry — PoS(PSTP2017)

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The p-carbon polarimeter working in the dp/p Coulomb Nuclear Interference (CNI) region has been used in the Brookhaven Alternating Gradient Synchrotron (AGS) for many years. It has gone though several upgrades to improve its performance. With targets sweeping through beam vertically and horizontally, the polarimeter can provide polarization profile information. To preserve polarization, a pair of horizontal tune jump quads have been used to overcome horizontal intrinsic resonances. Recently, the polarization measurement on the energy ramp has been used to decide the beam energy as function of time on the ramp. This paper summarize the recent operation experience of AGS p-carbon CNI polarimeter.

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“…Because H drift depends only on momenta, and H m only on coördinates, they each generate very simple motion. We then solve the total Hamiltonian, H mult , in a manner exactly analogous to our solution in (27) of the quadrupole Hamiltonian (21). For information about transfer maps for multipole fringe fields, consult [25].…”

Section: And (21c)mentioning

confidence: 99%

Accurate and efficient spin integration for particle accelerators

Abell

Meiser

Ranjbar

et al. 2015

Phys. Rev. ST Accel. Beams

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Accurate spin tracking is a valuable tool for understanding spin dynamics in particle accelerators and can help improve the performance of an accelerator. In this paper, we present a detailed discussion of the integrators in the spin tracking code gpuSpinTrack. We have implemented orbital integrators based on drift-kick, bend-kick, and matrix-kick splits. On top of the orbital integrators, we have implemented various integrators for the spin motion. These integrators use quaternions and Romberg quadratures to accelerate both the computation and the convergence of spin rotations. We evaluate their performance and accuracy in quantitative detail for individual elements as well as for the entire RHIC lattice. We exploit the inherently data-parallel nature of spin tracking to accelerate our algorithms on graphics processing units.Comment: 43 pages, 17 figure

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Impact of three-dimensional polarization profiles on spin-dependent measurements in colliding beam experiments

Cited by 9 publications

References 6 publications

Siberian Snakes, Figure-8 and Spin Transparency Techniques for High Precision Experiments with Polarized Hadron Beams in Colliders

Siberian Snakes, Figure-8 and Spin Transparency Techniques for High Precision Experiments with Polarized Hadron Beams in Colliders

AGS P-carbon CNI polarimeter Operation Experience

Accurate and efficient spin integration for particle accelerators

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