An e⁺e^-/γγ/ep Accelerator Complex at a Future Circular Collider

Radoje Belusevic

High Energy Accelerator Research Organization (KEK), Tsukuba, Japan.

DOI: 10.4236/jhepgc.2019.52024                

Abstract

This is the second paper by the author describing versatile accelerator complexes that could be built at a Future Circular Collider (FCC) in order to produce e⁺e^-, γγ and ep collisions. The facility described here features an ILC-based e⁺e^- collider placed tangentially to the FCC tunnel. If the collider is positioned asymmetrically with respect to the FCC tunnel, electron (or positron) bunches could be accelerated by both linacs before they are brought into collision with the 50-TeV beams from the FCC proton storage ring (FCC-pp). The two linacs may also form a part of the injector chain for FCC-pp. The facility could be converted into a γγ collider or a source of multi-MW beams for fixed-target experiments.

Keywords

Accelerator, Future Circular Collider (FCC), Experiments

Conflicts of Interest

The authors declare no conflicts of interest regarding the publication of this paper.

References

[1]	Blondel, A. and Zimmermann, F. A High Luminosity e+e- Collider in the LHC Tunnel to Study the Higgs Boson. CERN-OPEN-2011-047, arXiv:1112.2518.
[2]	Koratzinos, M. The FCC-ee Design Study: Luminosity and Beam Polarization. arXiv:1511.01021v1.
[3]	Belusevic, R. (2017) An SLC-Type e+e-/γγ Facility at a Future Circular Collider. Journal of Modern Physics, 8, 1-16. https://doi.org/10.4236/jmp.2017.81001
[4]	Boscolo, M., Delahaye, J.-P. and Palmer, M. The Future Prospects of Muon Colliders and Neutrino Factories. arXiv:1808.01858.
[5]	Aurand, B., et al. Beam Polarization at the ILC: The Physics Impact and the Accelerator Solutions. Proceedings of the International Linear Collider Workshop (LCWS08 and ILC08), Chicago, arXiv:0903.2959.
[6]	Moortgat-Pick, G., et al., (2015) Physics at the e+e- Linear Collider. The European Physical Journal C, 75, 371. https://doi.org/10.1140/epjc/s10052-015-3511-9
[7]	McCullough, M. An Indirect Model-Dependent Probe of the Higgs Self-Coupling. arXiv:1312.3322v6.
[8]	Di Vita, S., et al. A Global View on the Higgs Self-Coupling at Lepton Colliders. DESY 17-131, FERMILAB-PUB-17-462-T, arXiv:1711.03978.
[9]	Erler, J., et al. (2000) Physics Impact of GigaZ. Physics Letters B, 486, 125-133. https://doi.org/10.1016/S0370-2693(00)00749-8
[10]	Bruning, O., et al. (2017) Future Circular Collider Study FCC-he Baseline Parameters. CERN-ACC-2017-0019.
[11]	Abelleira Fernandez, J.L. (2012) A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector. Journal of Physics G: Nuclear and Particle Physics, 39, Article ID: 075001. https://doi.org/10.1088/0954-3899/39/7/075001
[12]	Asner, D., et al. ILC Higgs White Paper. arXiv:1310.0763v3.
[13]	C. Adolphsen et al. The International Linear Collider Technical Design Report. Vol. 3, arXiv:1306.6328.
[14]	Weber, G., et al. (1979) Interaction Regions and Detectors for Electron Proton Experiments at 140 GeV + 20 TeV. Proceedings of 2nd ICFA Workshop on Possibilities and Limitations of Accelerators and Detectors, Les Diablerets, 4-10 October 1979, 199-221.
[15]	Alekhin, S.I., et al. (1987) Prospects of the Future ep Colliders. IHEP Preprint 87-48, Serpukhov.
[16]	Akay, A.N., Karadeniz, H. and Sultansoy, S. (2010) Review of Linac-Ring-Type Collider Proposals. International Journal of Modern Physics A, 25, 4589-4602. https://doi.org/10.1142/S0217751X10049165
[17]	Tigner, M., Wiik, B. and Willeke, F. (1991) An Electron-Proton Collider in the TeV Range. Proc. 1991 IEEE Part. Accel. Conf., San Francisco, CA.
[18]	Zimmermann, F., et al. (2008) Linac-LHC ep Collider Options. Proceedings of EPAC, Genoa, 847-2849.
[19]	Benedikt, M., Schulte, D. and Zimmermann, F. (2015) Optimizing Integrated Luminosity of Future Hadron Colliders. Physical Review Special Topics—Accelerators and Beams, 18, Article ID: 101002. https://doi.org/10.1103/PhysRevSTAB.18.101002
[20]	Zimmermann, F. (2015) High-Energy Physics Strategies and Future Large-Scale Projects. Nuclear Instruments and Methods in Physics Research Section B, 355, 4-10. https://doi.org/10.1016/j.nimb.2015.03.090
[21]	Furman, M.A. (1991) Hourglass Effects for Asymmetric Colliders. IEEE Particle Accelerator Conference, San Francisco, 6-9 May 1991, 422-424. https://doi.org/10.1109/PAC.1991.164321
[22]	Yokoya, K. and Chen, P. (1992) Beam-Beam Phenomena in Linear Colliders. Springer, Berlin, 415-445.
[23]	Hao, Y. and Ptitsyn, V. (2010) Effect of Electron Disruption in the Energy Recovery Linac Based Electron Ion Collider. Physical Review Special Topics—Accelerators and Beams, 13, Article ID: 071003. https://doi.org/10.1103/PhysRevSTAB.13.071003
[24]	Schindl, K. (1999) Space Charge. Proceedings of Joint US-CERN-Japan-Russia School on Particle Accelerators, Beam Measurements, Montreux, 127-151. https://doi.org/10.1142/9789812818003_0004
[25]	Benedikt, M. and Garoby, R. (2005) High Brightness Proton Beams for LHC: Needs and Means. CERN-AB-2005-009.
[26]	Danared, H., Lindroos, M. and Theroine, C. (2014) ESS: Neutron Beams at the High-Intensity Frontier. CERN Courier, 21-24 June.
[27]	Piwinski, A. (1975) Intra-Beam Scattering. 9th International Conference on High Energy Accelerators, Stanford, 405.
[28]	Parzen, G. (1987) Intrabeam Scattering at High Energies. Nuclear Instruments and Methods in Physics Research, Section A, 256, 231-240. https://doi.org/10.1016/0168-9002(87)90213-0
[29]	Ruggiero, F. and Zimmermann, F. (2002) Luminosity Optimization near the Beam-Beam Limit by Increasing Bunch Length or Crossing Angle. Physical Review Special Topics—Accelerators and Beams, 5, Article ID: 061001. https://doi.org/10.1103/PhysRevSTAB.5.061001
[30]	Brinkmann, R. (1998) Interaction Region and Luminosity Limitations for the TESLA/HERA e/p Collider. Turkish Journal of Physics, 22, 661-666.
[31]	Yavas, Ö. (1998) Tune Shift Limitations for Linac-Ring Type Colliders. Turkish Journal of Physics, 22, 667-673.
[32]	Wille, K. (2000) The Physics of Particle Accelerators. Oxford Univ. Press, Oxford.
[33]	Zimmermann, F. (2002) Accelerator Physics and Technologies for Linear Colliders. Physics 575 Lecture Notes, University of Chicago, Chicago.
[34]	Fartoukh, S. (2013) Achromatic Telescopic Squeezing Scheme and Application to the LHC and Its Luminosity Upgrade. Physical Review Special Topics—Accelerators and Beams, 16, Article ID: 111002. https://doi.org/10.1103/PhysRevSTAB.16.111002
[35]	Cruz-Alaniz, E., et al. (2015) Design of the Large Hadron Electron Collider Interaction Region. Physical Review Special Topics—Accelerators and Beams, 18, Article ID: 111001. https://doi.org/10.1103/PhysRevSTAB.18.111001
[36]	Damerau, H. (2005) Creation and Storage of Long and Flat Bunches in the LHC. Ph.D. Thesis, Technical Univ. Darmstadt, Darmstadt.
[37]	ALOHEP. https://alohep.hepforge.org
[38]	Acar, Y.C., et al. (2017) Future Circular Collider Based Lepton-Hadron and Photon-Hadron Colliders: Luminosity and Physics. Nuclear Instruments and Methods in Physics Research Section A, 871, 47-53. https://doi.org/10.1016/j.nima.2017.07.041
[39]	Katz, U., Klein, M., Levy, A. and Schlenstedt, S. (2001) The THERA Book. DESY 01-123F, Vol. 4, DESY-LC-REV-2001-062.