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Title: RHIC polarized proton-proton operation at 100 GeV in Run 15

Abstract

The first part of RHIC Run 15 consisted of ten weeks of polarized proton on proton collisions at a beam energy of 100 GeV at two interaction points. In this paper we discuss several of the upgrades to the collider complex that allowed for improved performance. The largest effort consisted in commissioning of the electron lenses, one in each ring, which are designed to compensate one of the two beam-beam interactions experienced by the proton bunches. The e-lenses raise the per bunch intensity at which luminosity becomes beam-beam limited. A new lattice was designed to create the phase advances necessary for a beam-beam compensation with the e-lens, which also has an improved off-momentum dynamic aperture relative to previous runs. In order to take advantage of the new, higher intensity limit without suffering intensity driven emittance deterioration, other features were commissioned including a continuous transverse bunch-by-bunch damper in RHIC and a double harmonic RF cature scheme in the Booster. Other high intensity protections include improvements to the abort system and the installation of masks to intercept beam lost due to abort kicker pre-fires.

Authors:
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  1. Brookhaven National Laboratory (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1188267
Report Number(s):
BNL-107449-2015-CP
R&D Project: KBCH139; 18031; KB0202011; TRN: US1500261
DOE Contract Number:  
SC00112704
Resource Type:
Conference
Resource Relation:
Conference: 6th International Particle Accelerator Conference (IPAC’15), Richmond, VA (United States), 3-8 May 2015
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BROOKHAVEN RHIC; GEV RANGE 10-100; ELECTROMAGNETIC LENSES; BEAM LUMINOSITY; BEAM BUNCHING; RF SYSTEMS; PARTICLE BOOSTERS; DESIGN; PROTON-PROTON INTERACTIONS; BEAM-BEAM INTERACTIONS; POLARIZED BEAMS; COMMISSIONING; PERFORMANCE; SAFETY

Citation Formats

Schoefer, V., Aschenauer, E. C., Atoian, G., Blaskiewicz, M., Brown, K. A., Bruno, D., Connolly, R., D Ottavio, T., Drees, K. A., Dutheil, Y., Fischer, W., Gardner, C., Gu, X., Hayes, T., Huang, H., Laster, J., Liu, C., Luo, Y., Makdisi, Y., Marr, G., Marusic, A., Meot, F., Mernick, K., Michnoff, R., Marusic, A., Minty, M., Montag, C., Morris, J., Narayan, G., Nemesure, S., Pile, P., Poblaguev, A., Ranjbar, V., Robert-Demolaize, G., Roser, T., Schmidke, W. B., Severino, F., Shrey, T., Smith, K., Steski, D., Tepikian, S., Trbojevic, D., Tsoupas, N., Tuozzolo, J., Wang, G., White, S., Yip, K., Zaltsman, A., Zelenski, A., Zeno, K., and Zhang, S. Y. RHIC polarized proton-proton operation at 100 GeV in Run 15. United States: N. p., 2015. Web.
Schoefer, V., Aschenauer, E. C., Atoian, G., Blaskiewicz, M., Brown, K. A., Bruno, D., Connolly, R., D Ottavio, T., Drees, K. A., Dutheil, Y., Fischer, W., Gardner, C., Gu, X., Hayes, T., Huang, H., Laster, J., Liu, C., Luo, Y., Makdisi, Y., Marr, G., Marusic, A., Meot, F., Mernick, K., Michnoff, R., Marusic, A., Minty, M., Montag, C., Morris, J., Narayan, G., Nemesure, S., Pile, P., Poblaguev, A., Ranjbar, V., Robert-Demolaize, G., Roser, T., Schmidke, W. B., Severino, F., Shrey, T., Smith, K., Steski, D., Tepikian, S., Trbojevic, D., Tsoupas, N., Tuozzolo, J., Wang, G., White, S., Yip, K., Zaltsman, A., Zelenski, A., Zeno, K., & Zhang, S. Y. RHIC polarized proton-proton operation at 100 GeV in Run 15. United States.
Schoefer, V., Aschenauer, E. C., Atoian, G., Blaskiewicz, M., Brown, K. A., Bruno, D., Connolly, R., D Ottavio, T., Drees, K. A., Dutheil, Y., Fischer, W., Gardner, C., Gu, X., Hayes, T., Huang, H., Laster, J., Liu, C., Luo, Y., Makdisi, Y., Marr, G., Marusic, A., Meot, F., Mernick, K., Michnoff, R., Marusic, A., Minty, M., Montag, C., Morris, J., Narayan, G., Nemesure, S., Pile, P., Poblaguev, A., Ranjbar, V., Robert-Demolaize, G., Roser, T., Schmidke, W. B., Severino, F., Shrey, T., Smith, K., Steski, D., Tepikian, S., Trbojevic, D., Tsoupas, N., Tuozzolo, J., Wang, G., White, S., Yip, K., Zaltsman, A., Zelenski, A., Zeno, K., and Zhang, S. Y. Sun . "RHIC polarized proton-proton operation at 100 GeV in Run 15". United States. https://www.osti.gov/servlets/purl/1188267.
@article{osti_1188267,
title = {RHIC polarized proton-proton operation at 100 GeV in Run 15},
author = {Schoefer, V. and Aschenauer, E. C. and Atoian, G. and Blaskiewicz, M. and Brown, K. A. and Bruno, D. and Connolly, R. and D Ottavio, T. and Drees, K. A. and Dutheil, Y. and Fischer, W. and Gardner, C. and Gu, X. and Hayes, T. and Huang, H. and Laster, J. and Liu, C. and Luo, Y. and Makdisi, Y. and Marr, G. and Marusic, A. and Meot, F. and Mernick, K. and Michnoff, R. and Marusic, A. and Minty, M. and Montag, C. and Morris, J. and Narayan, G. and Nemesure, S. and Pile, P. and Poblaguev, A. and Ranjbar, V. and Robert-Demolaize, G. and Roser, T. and Schmidke, W. B. and Severino, F. and Shrey, T. and Smith, K. and Steski, D. and Tepikian, S. and Trbojevic, D. and Tsoupas, N. and Tuozzolo, J. and Wang, G. and White, S. and Yip, K. and Zaltsman, A. and Zelenski, A. and Zeno, K. and Zhang, S. Y.},
abstractNote = {The first part of RHIC Run 15 consisted of ten weeks of polarized proton on proton collisions at a beam energy of 100 GeV at two interaction points. In this paper we discuss several of the upgrades to the collider complex that allowed for improved performance. The largest effort consisted in commissioning of the electron lenses, one in each ring, which are designed to compensate one of the two beam-beam interactions experienced by the proton bunches. The e-lenses raise the per bunch intensity at which luminosity becomes beam-beam limited. A new lattice was designed to create the phase advances necessary for a beam-beam compensation with the e-lens, which also has an improved off-momentum dynamic aperture relative to previous runs. In order to take advantage of the new, higher intensity limit without suffering intensity driven emittance deterioration, other features were commissioned including a continuous transverse bunch-by-bunch damper in RHIC and a double harmonic RF cature scheme in the Booster. Other high intensity protections include improvements to the abort system and the installation of masks to intercept beam lost due to abort kicker pre-fires.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {5}
}

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