Electrostatic potential map modelling with COSY Infinity

Maloney, J.A.; Baartman, R.; Planche, Thomas; Saminathan, Suresh

doi:10.1016/j.nimb.2015.12.005

Cited by 2 publications

(2 citation statements)

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“…Field models for high accuracy evaluation of the Taylor maps of cylindrically symmetric electrostatic lenses (zero rf frequency) and time-varying cavities are used [13]. Several procedures have been developed for COSY that make it easier to accurately model nonidealized electrostatic elements and their fringe fields [14]. These procedures also allow an electrostatic element to be defined from measured or simulated potential data.…”

Section: Cosy Infinitymentioning

confidence: 99%

Computer codes for beam dynamics analysis of cyclotronlike accelerators

Smirnov

2017

Phys. Rev. Accel. Beams

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Computer codes suitable for the study of beam dynamics in cyclotronlike (classical and isochronous cyclotrons, synchrocyclotrons, and fixed field alternating gradient) accelerators are reviewed. Computer modeling of cyclotron segments, such as the central zone, acceleration region, and extraction system is considered. The author does not claim to give a full and detailed description of the methods and algorithms used in the codes. Special attention is paid to the codes already proven and confirmed at the existing accelerating facilities. The description of the programs prepared in the worldwide known accelerator centers is provided. The basic features of the programs available to users and limitations of their applicability are described.

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Section: Cosy Infinitymentioning

confidence: 99%

Computer codes for beam dynamics analysis of cyclotronlike accelerators

Smirnov

2017

Phys. Rev. Accel. Beams

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“…Furthermore, for accurate tracking of storage rings with electrostatic particle optical elements, it is necessary to accurately model fringe fields of electrostatic particle optical elements. However, the previous research on fringe fields tended to focus on magnetic (e.g., [82,83,112]) rather than electrostatic particle optical elements (e.g., the 2016 article [73]), and previous results on fringe field models of electrostatic particle optical elements are limited.…”

Section: Lattice Tracking Requirementsmentioning

confidence: 99%

Field Modeling, Symplectic Tracking, and Spin Decoherence for EDM and Muon $g\textrm{-}2$ Lattices

Valetov¹

2017

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While the first particle accelerators were electrostatic machines, and several electrostatic storage rings were subsequently commissioned and operated, electrostatic storage rings pose a number of challenges. Unlike motion in the magnetic field, where particle energy remains constant, particle energy generally changes in electrostatic elements. Conservation of energy in an electrostatic element is, in practice, only approximate, and it requires careful and accurate design, manufacturing, installation, and operational use. Electrostatic deflectors require relatively high electrostatic fields, tend to introduce nonlinear aberrations of all orders, and are more challenging to manufacture than homogeneous magnetic dipoles. Accordingly, magnetic storage rings are overwhelmingly prevalent.The search for electric dipole moments (EDMs) of fundamental particles is of key importance in the study of C and CP violations and their sources. C and CP violations are part of the Sakharov conditions that explain the matter-antimatter asymmetry in the universe. Determining the source of CP violations would provide valuable empirical insight for beyond-Standard-Model physics.EDMs of fundamental particles have not to this date been experimentally observed. The search for fundamental particle EDMs has narrowed the target search region; however, an EDM signal is yet to be discovered.In 2008, Brookhaven National Laboratory (BNL) had proposed the frozen spin (FS) concept for the search of a deuteron EDM. The FS concept envisions launching deuterons through a storage ring with combined electrostatic and magnetic fields. The electrostatic and magnetic fields are in a proportion that would, without an EDM, freeze the deuteron's spin along its momentum as the deuteron moves around the lattice. The radial electrostatic field would result in a torque on the spin vector, proportional to a deuteron EDM, rotating the spin vector out of the midplane.The principle of an anomalous magnetic dipole moment (MDM) measurement using a storage ring, shared by BNL's completed E821 Experiment and the ongoing E989 Experiment operated by Fermi National Accelerator Laboratory (FNAL), requires injecting muons into a magnetic ring at the so-called magic momentum. The magic momentum, as defined in this context, would freeze the muon's spin vector along its momentum if the anomalous MDM was zero. The spin precession in the horizontal plane relative to the momentum is proportional to the anomalous MDM.Storage rings for measurement of EDM and anomalous MDM present a new frontier in tracking code accuracy requirements. For accurate tracking of storage rings with electrostatic particle optical elements, it is necessary to model the fringe fields of such elements accurately, in particular, because not doing so provides a mechanism for energy conservation violation. However, the previous research on fringe fields tended to focus on magnetic rather than electrostatic particle optical elements. We will study and model the fringe fields of several electrostatic deflectors. ...

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Electrostatic potential map modelling with COSY Infinity

Cited by 2 publications

References 1 publication

Computer codes for beam dynamics analysis of cyclotronlike accelerators

Computer codes for beam dynamics analysis of cyclotronlike accelerators

Field Modeling, Symplectic Tracking, and Spin Decoherence for EDM and Muon $g\textrm{-}2$ Lattices

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