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Title: Design of beam optics for the future circular collider e + e - collider rings

Abstract

A beam optics scheme has been designed for the future circular collider- e +e - (FCC-ee). The main characteristics of the design are: beam energy 45 to 175 GeV, 100 km circumference with two interaction points (IPs) per ring, horizontal crossing angle of 30 mrad at the IP and the crab-waist scheme [P. Raimondi, D. Shatilov, and M. Zobov, arXiv:physics/0702033; P. Raimondi, M. Zobov, and D. Shatilov, in Proceedings of the 22nd Particle Accelerator Conference, PAC-2007, Albuquerque, NM (IEEE, New York, 2007), p. TUPAN037.] with local chromaticity correction. The crab-waist scheme is implemented within the local chromaticity correction system without additional sextupoles, by reducing the strength of one of the two sextupoles for vertical chromatic correction at each side of the IP. So-called “tapering” of the magnets is applied, which scales all fields of the magnets according to the local beam energy to compensate for the effect of synchrotron radiation (SR) loss along the ring. An asymmetric layout near the interaction region reduces the critical energy of SR photons on the incoming side of the IP to values below 100 keV, while matching the geometry to the beam line of the FCC proton collider (FCC-hh) [A. Chancé et al., Proceedingsmore » of IPAC’16, 9–13 May 2016, Busan, Korea, TUPMW020 (2016).] as closely as possible. Sufficient transverse/longitudinal dynamic aperture (DA) has been obtained, including major dynamical effects, to assure an adequate beam lifetime in the presence of beamstrahlung and top-up injection. In particular, a momentum acceptance larger than ±2% has been obtained, which is better than the momentum acceptance of typical collider rings by about a factor of 2. The effects of the detector solenoids including their compensation elements are taken into account as well as synchrotron radiation in all magnets. The optics presented in this study is a step toward a full conceptual design for the collider. Finally, a number of issues have been identified for further study.« less

Authors:
 [1];  [2];  [2];  [2];  [3];  [4];  [5];  [2];  [6];  [2];  [2];  [2];  [2];  [4];  [3];  [4];  [2];  [1];  [2];  [4] more »;  [4];  [6];  [6];  [2];  [7];  [1];  [2] « less
  1. The High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
  2. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  3. Univ. of Geneva (Switzerland). Dept. of Nuclear and Particle Physics (DPNC)
  4. Russian Academy of Sciences (RAS), Novosibirsk (Russian Federation). Budker Inst. of Nuclear Physics (BINP)
  5. National Inst. for Nuclear Physics (INFN), Frascati (Italy). National Lab. of Frascati (LNF)
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  7. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Paul Scherrer Inst. (PSI), Villigen (Switzerland); Russian Academy of Sciences (RAS), Novosibirsk (Russian Federation)
Sponsoring Org.:
USDOE; European Commission (EC); National Council of Science and Technology (CONACyT) (Mexico)
Contributing Org.:
The High Energy Accelerator Research Organization (KEK), Tsukuba (Japan); Univ. of Geneva (Switzerland); National Inst. for Nuclear Physics (INFN), Frascati (Italy)
OSTI Identifier:
1339646
Alternate Identifier(s):
OSTI ID: 1349099
Grant/Contract Number:  
AC02-76SF00515; 312453
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 19; Journal Issue: 11; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Oide, Katsunobu, Aiba, M., Aumon, S., Benedikt, M., Blondel, A., Bogomyagkov, A., Boscolo, M., Burkhardt, H., Cai, Y., Doblhammer, A., Haerer, B., Holzer, B., Jowett, J. M., Koop, I., Koratzinos, M., Levichev, E., Medina, L., Ohmi, K., Papaphilippou, Y., Piminov, P., Shatilov, D., Sinyatkin, S., Sullivan, M., Wenninger, J., Wienands, U., Zhou, D., and Zimmermann, F. Design of beam optics for the future circular collider e+e- collider rings. United States: N. p., 2016. Web. doi:10.1103/PhysRevAccelBeams.19.111005.
Oide, Katsunobu, Aiba, M., Aumon, S., Benedikt, M., Blondel, A., Bogomyagkov, A., Boscolo, M., Burkhardt, H., Cai, Y., Doblhammer, A., Haerer, B., Holzer, B., Jowett, J. M., Koop, I., Koratzinos, M., Levichev, E., Medina, L., Ohmi, K., Papaphilippou, Y., Piminov, P., Shatilov, D., Sinyatkin, S., Sullivan, M., Wenninger, J., Wienands, U., Zhou, D., & Zimmermann, F. Design of beam optics for the future circular collider e+e- collider rings. United States. doi:10.1103/PhysRevAccelBeams.19.111005.
Oide, Katsunobu, Aiba, M., Aumon, S., Benedikt, M., Blondel, A., Bogomyagkov, A., Boscolo, M., Burkhardt, H., Cai, Y., Doblhammer, A., Haerer, B., Holzer, B., Jowett, J. M., Koop, I., Koratzinos, M., Levichev, E., Medina, L., Ohmi, K., Papaphilippou, Y., Piminov, P., Shatilov, D., Sinyatkin, S., Sullivan, M., Wenninger, J., Wienands, U., Zhou, D., and Zimmermann, F. Mon . "Design of beam optics for the future circular collider e+e- collider rings". United States. doi:10.1103/PhysRevAccelBeams.19.111005. https://www.osti.gov/servlets/purl/1339646.
@article{osti_1339646,
title = {Design of beam optics for the future circular collider e+e- collider rings},
author = {Oide, Katsunobu and Aiba, M. and Aumon, S. and Benedikt, M. and Blondel, A. and Bogomyagkov, A. and Boscolo, M. and Burkhardt, H. and Cai, Y. and Doblhammer, A. and Haerer, B. and Holzer, B. and Jowett, J. M. and Koop, I. and Koratzinos, M. and Levichev, E. and Medina, L. and Ohmi, K. and Papaphilippou, Y. and Piminov, P. and Shatilov, D. and Sinyatkin, S. and Sullivan, M. and Wenninger, J. and Wienands, U. and Zhou, D. and Zimmermann, F.},
abstractNote = {A beam optics scheme has been designed for the future circular collider- e+e- (FCC-ee). The main characteristics of the design are: beam energy 45 to 175 GeV, 100 km circumference with two interaction points (IPs) per ring, horizontal crossing angle of 30 mrad at the IP and the crab-waist scheme [P. Raimondi, D. Shatilov, and M. Zobov, arXiv:physics/0702033; P. Raimondi, M. Zobov, and D. Shatilov, in Proceedings of the 22nd Particle Accelerator Conference, PAC-2007, Albuquerque, NM (IEEE, New York, 2007), p. TUPAN037.] with local chromaticity correction. The crab-waist scheme is implemented within the local chromaticity correction system without additional sextupoles, by reducing the strength of one of the two sextupoles for vertical chromatic correction at each side of the IP. So-called “tapering” of the magnets is applied, which scales all fields of the magnets according to the local beam energy to compensate for the effect of synchrotron radiation (SR) loss along the ring. An asymmetric layout near the interaction region reduces the critical energy of SR photons on the incoming side of the IP to values below 100 keV, while matching the geometry to the beam line of the FCC proton collider (FCC-hh) [A. Chancé et al., Proceedings of IPAC’16, 9–13 May 2016, Busan, Korea, TUPMW020 (2016).] as closely as possible. Sufficient transverse/longitudinal dynamic aperture (DA) has been obtained, including major dynamical effects, to assure an adequate beam lifetime in the presence of beamstrahlung and top-up injection. In particular, a momentum acceptance larger than ±2% has been obtained, which is better than the momentum acceptance of typical collider rings by about a factor of 2. The effects of the detector solenoids including their compensation elements are taken into account as well as synchrotron radiation in all magnets. The optics presented in this study is a step toward a full conceptual design for the collider. Finally, a number of issues have been identified for further study.},
doi = {10.1103/PhysRevAccelBeams.19.111005},
journal = {Physical Review Accelerators and Beams},
number = 11,
volume = 19,
place = {United States},
year = {2016},
month = {11}
}

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Works referenced in this record:

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journal, April 2014

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    Works referencing / citing this record:

    FCC-ee: The Lepton Collider: Future Circular Collider Conceptual Design Report Volume 2
    journal, June 2019

    • Abada, A.; Abbrescia, M.; AbdusSalam, S. S.
    • The European Physical Journal Special Topics, Vol. 228, Issue 2
    • DOI: 10.1140/epjst/e2019-900045-4