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Title: Electron lenses for head-on beam-beam compensation in RHIC

Two electron lenses (e-lenses) have been in operation during 2015 RHIC physics run as part of a head-on beam-beam compensation scheme. While the RHIC lattice was chosen to reduce the beam-beam induced resonance driving terms, the electron lenses reduced the beam-beam induced tune spread. This has been demonstrated for the first time. The beam-beam compensation scheme allows for higher beam-beam parameters and therefore higher intensities and luminosity. In this paper, we detailed the design considerations and verification of the electron beam parameters of the RHIC e-lenses. Lastly, longitudinal and transverse alignments with ion beams and the transverse beam transfer function (BTF) measurement with head-on electron-proton beam are presented.
Authors:
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  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. European Synchrotron Radiation Facility (ESRF), Grenoble (France)
Publication Date:
Report Number(s):
BNL-113497-2017-JA; BNL-114475-2017-JA
Journal ID: ISSN 2469-9888; PRABCJ; R&D Project: KBCH139; 18064; KB0202011; TRN: US1700705
Grant/Contract Number:
SC0012704; AC02- 98CH10886; AC02-98CH10886
Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams (Online)
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams (Online); Journal Volume: 20; Journal Issue: 2; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS
OSTI Identifier:
1344185
Alternate Identifier(s):
OSTI ID: 1344226; OSTI ID: 1408720

Gu, X., Fischer, W., Altinbas, Z., Anerella, M., Bajon, E., Bannon, M., Bruno, D., Costanzo, M., Drees, A., Gassner, D. M., Gupta, R. C., Hock, J., Harvey, M., Jain, A. K., Jamilkowski, J. P., Kankiya, P., Lambiase, R., Liu, C., Luo, Y., Mapes, M., Marusic, A., Mi, C., Michnoff, R., Miller, T. A., Minty, M., Nemesure, S., Ng, W., Phillips, D., Pikin, A. I., Rosas, P. J., Robert-Demolaize, G., Samms, T., Sandberg, J., Schoefer, V., Shrey, T. C., Tan, Y., Than, R., Theisen, C., Thieberger, P., Tuozzolo, J., Wanderer, P., Zhang, W., and White, S. M.. Electron lenses for head-on beam-beam compensation in RHIC. United States: N. p., Web. doi:10.1103/PhysRevAccelBeams.20.023501.
Gu, X., Fischer, W., Altinbas, Z., Anerella, M., Bajon, E., Bannon, M., Bruno, D., Costanzo, M., Drees, A., Gassner, D. M., Gupta, R. C., Hock, J., Harvey, M., Jain, A. K., Jamilkowski, J. P., Kankiya, P., Lambiase, R., Liu, C., Luo, Y., Mapes, M., Marusic, A., Mi, C., Michnoff, R., Miller, T. A., Minty, M., Nemesure, S., Ng, W., Phillips, D., Pikin, A. I., Rosas, P. J., Robert-Demolaize, G., Samms, T., Sandberg, J., Schoefer, V., Shrey, T. C., Tan, Y., Than, R., Theisen, C., Thieberger, P., Tuozzolo, J., Wanderer, P., Zhang, W., & White, S. M.. Electron lenses for head-on beam-beam compensation in RHIC. United States. doi:10.1103/PhysRevAccelBeams.20.023501.
Gu, X., Fischer, W., Altinbas, Z., Anerella, M., Bajon, E., Bannon, M., Bruno, D., Costanzo, M., Drees, A., Gassner, D. M., Gupta, R. C., Hock, J., Harvey, M., Jain, A. K., Jamilkowski, J. P., Kankiya, P., Lambiase, R., Liu, C., Luo, Y., Mapes, M., Marusic, A., Mi, C., Michnoff, R., Miller, T. A., Minty, M., Nemesure, S., Ng, W., Phillips, D., Pikin, A. I., Rosas, P. J., Robert-Demolaize, G., Samms, T., Sandberg, J., Schoefer, V., Shrey, T. C., Tan, Y., Than, R., Theisen, C., Thieberger, P., Tuozzolo, J., Wanderer, P., Zhang, W., and White, S. M.. 2017. "Electron lenses for head-on beam-beam compensation in RHIC". United States. doi:10.1103/PhysRevAccelBeams.20.023501.
@article{osti_1344185,
title = {Electron lenses for head-on beam-beam compensation in RHIC},
author = {Gu, X. and Fischer, W. and Altinbas, Z. and Anerella, M. and Bajon, E. and Bannon, M. and Bruno, D. and Costanzo, M. and Drees, A. and Gassner, D. M. and Gupta, R. C. and Hock, J. and Harvey, M. and Jain, A. K. and Jamilkowski, J. P. and Kankiya, P. and Lambiase, R. and Liu, C. and Luo, Y. and Mapes, M. and Marusic, A. and Mi, C. and Michnoff, R. and Miller, T. A. and Minty, M. and Nemesure, S. and Ng, W. and Phillips, D. and Pikin, A. I. and Rosas, P. J. and Robert-Demolaize, G. and Samms, T. and Sandberg, J. and Schoefer, V. and Shrey, T. C. and Tan, Y. and Than, R. and Theisen, C. and Thieberger, P. and Tuozzolo, J. and Wanderer, P. and Zhang, W. and White, S. M.},
abstractNote = {Two electron lenses (e-lenses) have been in operation during 2015 RHIC physics run as part of a head-on beam-beam compensation scheme. While the RHIC lattice was chosen to reduce the beam-beam induced resonance driving terms, the electron lenses reduced the beam-beam induced tune spread. This has been demonstrated for the first time. The beam-beam compensation scheme allows for higher beam-beam parameters and therefore higher intensities and luminosity. In this paper, we detailed the design considerations and verification of the electron beam parameters of the RHIC e-lenses. Lastly, longitudinal and transverse alignments with ion beams and the transverse beam transfer function (BTF) measurement with head-on electron-proton beam are presented.},
doi = {10.1103/PhysRevAccelBeams.20.023501},
journal = {Physical Review Accelerators and Beams (Online)},
number = 2,
volume = 20,
place = {United States},
year = {2017},
month = {2}
}