Design and test of 704 MHz and 2.1 GHz normal conducting cavities for low energy RHIC electron cooler

Xiao, Binping; Belomestnykh, S.; Brennan, J. M.; Brutus, J. C.; McIntyre, G.; Mernick, K.; Pai, C.; Smith, K.; Xin, T.; Zaltsman, A.; Veshcherevich, V.

doi:10.1103/PhysRevAccelBeams.22.030101

Title: Design and test of 704 MHz and 2.1 GHz normal conducting cavities for low energy RHIC electron cooler

Abstract

The low energy RHIC electron cooler (LEReC) is currently under commissioning at BNL to improve RHIC luminosity for heavy ion beam energies below 10 GeV/nucleon. The linac of LEReC consists of a dc photoemission gun, one 704 MHz superconducting radio frequency booster cavity, and three normal conducting cavities. It is designed to deliver a 1.6–2.6 MeV electron beam, with peak-to-peak momentum spread dp/p of less than ± 7 ×10^-4. Two of the three normal conducting cavities will be used in LEReC for energy spread correction: a single-cell 704 MHz cavity for energy dechirping and a three-cell 2.1 GHz third harmonic cavity for rf curvature correction. In this paper, we present the designs and rf test results of these two cavities.

Authors:: Xiao, Binping; Belomestnykh, S.; Brennan, J. M.; Brutus, J. C.; McIntyre, G.; Mernick, K.; Pai, C.; Smith, K.; Xin, T.; Zaltsman, A.; Veshcherevich, V.

Publication Date:: Tue Mar 05 00:00:00 EST 2019

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1497933

Alternate Identifier(s):: OSTI ID: 1498283; OSTI ID: 1508347; OSTI ID: 1530596

Report Number(s):: BNL-211320-2019-JAAM; arXiv:1804.02007; FERMILAB-PUB-18-756-TD
Journal ID: ISSN 2469-9888; PRABCJ; 030101

Grant/Contract Number:: AC02-98CH10886; AC02-05CH11231; SC0012704; AC02-07CH11359

Resource Type:: Published Article

Journal Name:: Physical Review Accelerators and Beams

Additional Journal Information:: Journal Name: Physical Review Accelerators and Beams Journal Volume: 22 Journal Issue: 3; Journal ID: ISSN 2469-9888

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS

Citation Formats


                    Xiao, Binping, Belomestnykh, S., Brennan, J. M., Brutus, J. C., McIntyre, G., Mernick, K., Pai, C., Smith, K., Xin, T., Zaltsman, A., and Veshcherevich, V. Design and test of 704 MHz and 2.1 GHz normal conducting cavities for low energy RHIC electron cooler.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevAccelBeams.22.030101.

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                    Xiao, Binping, Belomestnykh, S., Brennan, J. M., Brutus, J. C., McIntyre, G., Mernick, K., Pai, C., Smith, K., Xin, T., Zaltsman, A., & Veshcherevich, V. Design and test of 704 MHz and 2.1 GHz normal conducting cavities for low energy RHIC electron cooler.  United States.  https://doi.org/10.1103/PhysRevAccelBeams.22.030101

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                    Xiao, Binping, Belomestnykh, S., Brennan, J. M., Brutus, J. C., McIntyre, G., Mernick, K., Pai, C., Smith, K., Xin, T., Zaltsman, A., and Veshcherevich, V. Tue .  
"Design and test of 704 MHz and 2.1 GHz normal conducting cavities for low energy RHIC electron cooler".  United States.  https://doi.org/10.1103/PhysRevAccelBeams.22.030101.

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@article{osti_1497933,

  title        = {Design and test of 704 MHz and 2.1 GHz normal conducting cavities for low energy RHIC electron cooler},

  author       = {Xiao, Binping and Belomestnykh, S. and Brennan, J. M. and Brutus, J. C. and McIntyre, G. and Mernick, K. and Pai, C. and Smith, K. and Xin, T. and Zaltsman, A. and Veshcherevich, V.},

  abstractNote = {The low energy RHIC electron cooler (LEReC) is currently under commissioning at BNL to improve RHIC luminosity for heavy ion beam energies below 10 GeV/nucleon. The linac of LEReC consists of a dc photoemission gun, one 704 MHz superconducting radio frequency booster cavity, and three normal conducting cavities. It is designed to deliver a 1.6–2.6 MeV electron beam, with peak-to-peak momentum spread dp/p of less than ± 7 ×10-4. Two of the three normal conducting cavities will be used in LEReC for energy spread correction: a single-cell 704 MHz cavity for energy dechirping and a three-cell 2.1 GHz third harmonic cavity for rf curvature correction. In this paper, we present the designs and rf test results of these two cavities.},

  doi          = {10.1103/PhysRevAccelBeams.22.030101},

  journal      = {Physical Review Accelerators and Beams},

  number       = 3,

  volume       = 22,

  place        = {United States},

  year         = {Tue Mar 05 00:00:00 EST 2019},

  month        = {Tue Mar 05 00:00:00 EST 2019}

}

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Cited by: 10 works

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Figure 1: electron (blue solid line) and ion (red dashed line) beam pattern. (a) three 9 MHz bunch trains; (b) one 9 MHz ion bunch with one electron bunch train that consists of 30 flat-top electron bunches; (c) two adjacent flat-top electron bunches that are spaced 1.42 nS, corresponding tomore »

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Works referenced in this record:

Design and Performance of the Cornell ERL DC Photoemission Gun
conference, January 2009

Smolenski, K.; Bazarov, I.; Dunham, B.
SPIN PHYSICS: 18th International Spin Physics Symposium, AIP Conference Proceedings
DOI: 10.1063/1.3215596

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Title: Design and test of 704 MHz and 2.1 GHz normal conducting cavities for low energy RHIC electron cooler

Abstract

Citation Formats

Figures / Tables:

Design and Performance of the Cornell ERL DC Photoemission Gun conference, January 2009

Design and Performance of the Cornell ERL DC Photoemission Gun
conference, January 2009