Publisher’s Note: Design of beam optics for the future circular collider 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>
 collider rings [Phys. Rev. Accel. Beams 
<b>19</b>
, 111005 (2016)]

Oide, K.; Aiba, M.; Aumon, Sandra; Benedikt, Michael; Blondel, A.; Bogomyagkov, A.; Boscolo, M.; Burkhardt, H.; Cai, Yunhai; Doblhammer, A.; Haerer, B.; Holzer, B.; Jowett, John; Koop, I. A.; Koratzinos, M.; Levichev, E.; Medina, L.; Ohmi, K.; Papaphilippou, Y.; Piminov, P.; Shatilov, D.; Sinyatkin, S.; Sullivan, M. K.; Wenninger, J.; Wienands, U.; Zhou, Demin; Zimmermann, Frank

doi:10.1103/physrevaccelbeams.20.049901

Cited by 11 publications

(26 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The transverse dynamic aperture is limited by the sextupoles for linear chromaticity correction, Maxwellian magnet fringe fields [13] and kinematic terms reflecting non-paraxiallity of particle motion in the first order. All chromatic sextupoles are combined in pairs with the I optical transformation in between [10]. Such arrangement cancels quadratic geometrical aberrations; therefore, the leading terms of nonlinear perturbation are cubic ones.…”

Section: Parameters Values and Observations From Trackingmentioning

confidence: 99%

“…Our interests to the subject was inspired by the FCCee lattice study. With the help of SAD accelerator design code [9] K. Oide demonstrated FCC-ee transverse dynamic aperture reduction due to radiation from quadrupoles [10], "While the radiation loss in dipoles improves the aperture, especially at tt, due to the strong damping, the radiation loss in the quadrupoles for particles with large betatron amplitudes reduces the dynamic aperture. This is due to the induced synchrotron motion through the radiation loss.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic aperture limitation in e+e− colliders due to synchrotron radiation in quadrupoles

Bogomyagkov

Sinyatkin

Glukhov

et al. 2019

Phys. Rev. Accel. Beams

Self Cite

View full text Add to dashboard Cite

In a lepton storage ring of very high energy (e.g. in the e + e − Higgs factory) synchrotron radiation from quadrupoles constrains transverse dynamic aperture even in the absence of any magnetic nonlinearities. This was observed in tracking for LEP and the Future Circular e + e − Collider (FCCee). Here we describe a new mechanism of instability created by modulation of the particle energy at the double betatron frequency by synchrotron radiation in the quadrupoles. Energy modulation varies transverse focusing strength at the same frequency and creates a parametric resonance of the betatron oscillations with unusual properties. It occurs at arbitrary betatron frequency (the resonant detuning is always zero) and the magnitude of the parameter modulation of the betatron oscillation (strength of the resonance driving term) depends on the oscillation amplitude. Equilibrium between the radiation damping and the resonant excitation gives the boundary of the stable motion. Starting from 6d equations of motion we derive and solve the relevant differential equation describing the resonance, and show good agreement between analytical results and numerical simulation.

show abstract

Section: Parameters Values and Observations From Trackingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic aperture limitation in e+e− colliders due to synchrotron radiation in quadrupoles

Bogomyagkov

Sinyatkin

Glukhov

et al. 2019

Phys. Rev. Accel. Beams

Self Cite

View full text Add to dashboard Cite

show abstract

“…The baseline optics for the FCC-ee double-ring collider is described in Ref. [3]. The main characteristics of the optics design are two interaction points (IPs) per ring, horizontal crossing angle of * manuela.boscolo@lnf.infn.it 18 18 30 mrad at the IP and the crab-waist scheme with local chromatic correction system.…”

Section: Layout and Design Criteriamentioning

confidence: 99%

Machine Detector Interface for the e+e- Future Circular Collider

Boscolo¹

2018

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2017)

View full text Add to dashboard Cite

The design of the interaction region (IR) of the positron-electron future circular collider must comply with various important constraints, imposed by high beam currents, short bunches, high beam energy, high luminosity need for polarization, and crossing scheme. The innovative IR layout of the FCC-ee is based on the crab-waist collision scheme and it will be compatible for all beam energies foreseen, from 175 to 45.6 GeV. The optics scales with the energy. We show how the latest layout for the interaction region fulfils all requirements and physical constraints, as confirmed by numerical simulations performed on critical topics such as synchrotron radiation, trapped modes, collective effects, etc. The present magnet layout including solenoid compensation scheme is discussed, together with the design of the luminosity calorimeter and the designs for the first IR quadrupole design. A refined Geant4 model for the MDI is described, which allows studying the impact of luminosity and beam backgrounds on the detector occupancy.

show abstract

“…A future high-luminosity electron-positron collider, which could be housed in the same tunnel, is being considered as a possible first step [6]. A high-energy LHC upgrade is yet another option.…”

Section: A Large-scale Research Infrastructure For Europementioning

confidence: 99%