Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity

Xiao, Binping; Fedotov, A.; Hahn, H.; Holmes, D.; McIntyre, G.; Pai, C.; Seberg, S.; Smith, K.; Than, R.; Thieberger, P.; Tuozzolo, J.; Wu, Q.; Xin, T.; Xu, Wencan; Zaltsman, A.

doi:10.1103/PhysRevAccelBeams.22.050101

Title: Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity

Abstract

To improve RHIC luminosity for heavy ion beam energies below 10GeV/nucleon, the Low Energy RHIC electron Cooler (LEReC) is currently under commissioning at BNL. The Linac of LEReC is designed to deliver a 1.6MeV to 2.6MeV electron beam, with rms dp/p less than 5e-4.A 704 MHz superconducting radio frequency (SRF) booster cavity in this Linac provides up to 2.2 MeV accelerating voltage.With such a low energy and very demanding energy spread requirement,control of Higher Order Modes (HOMs) in the cavities becomes critical and needs to be carefully evaluated to ensure minimum impact on the beam. In this study, we report the multiphysics design of the HOM damper for this cavity to meet the energy spread requirement, as well as experimental results of the cavity with and without the HOM damper.

Authors:: Xiao, Binping; Fedotov, A.; Hahn, H.; Holmes, D.; McIntyre, G.; Pai, C.; Seberg, S.; Smith, K.; Than, R.; Thieberger, P.; Tuozzolo, J.; Wu, Q.; Xin, T.; Xu, Wencan; Zaltsman, A.

Publication Date:: Mon May 13 00:00:00 EDT 2019

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Org.:: National Energy Research Scientific Computing Center (NERSC)

OSTI Identifier:: 1512350

Alternate Identifier(s):: OSTI ID: 1508746; OSTI ID: 1542622

Report Number(s):: BNL-211577-2019-JAAM
Journal ID: ISSN 2469-9888; PRABCJ; 050101

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

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: 5; Journal ID: ISSN 2469-9888

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS

Citation Formats


                    Xiao, Binping, Fedotov, A., Hahn, H., Holmes, D., McIntyre, G., Pai, C., Seberg, S., Smith, K., Than, R., Thieberger, P., Tuozzolo, J., Wu, Q., Xin, T., Xu, Wencan, and Zaltsman, A. Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevAccelBeams.22.050101.

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                    Xiao, Binping, Fedotov, A., Hahn, H., Holmes, D., McIntyre, G., Pai, C., Seberg, S., Smith, K., Than, R., Thieberger, P., Tuozzolo, J., Wu, Q., Xin, T., Xu, Wencan, & Zaltsman, A. Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity.  United States.  https://doi.org/10.1103/PhysRevAccelBeams.22.050101

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                    Xiao, Binping, Fedotov, A., Hahn, H., Holmes, D., McIntyre, G., Pai, C., Seberg, S., Smith, K., Than, R., Thieberger, P., Tuozzolo, J., Wu, Q., Xin, T., Xu, Wencan, and Zaltsman, A. Mon .  
"Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity".  United States.  https://doi.org/10.1103/PhysRevAccelBeams.22.050101.

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@article{osti_1512350,

  title        = {Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity},

  author       = {Xiao, Binping and Fedotov, A. and Hahn, H. and Holmes, D. and McIntyre, G. and Pai, C. and Seberg, S. and Smith, K. and Than, R. and Thieberger, P. and Tuozzolo, J. and Wu, Q. and Xin, T. and Xu, Wencan and Zaltsman, A.},

  abstractNote = {To improve RHIC luminosity for heavy ion beam energies below 10GeV/nucleon, the Low Energy RHIC electron Cooler (LEReC) is currently under commissioning at BNL. The Linac of LEReC is designed to deliver a 1.6MeV to 2.6MeV electron beam, with rms dp/p less than 5e-4.A 704 MHz superconducting radio frequency (SRF) booster cavity in this Linac provides up to 2.2 MeV accelerating voltage.With such a low energy and very demanding energy spread requirement,control of Higher Order Modes (HOMs) in the cavities becomes critical and needs to be carefully evaluated to ensure minimum impact on the beam. In this study, we report the multiphysics design of the HOM damper for this cavity to meet the energy spread requirement, as well as experimental results of the cavity with and without the HOM damper.},

  doi          = {10.1103/PhysRevAccelBeams.22.050101},

  journal      = {Physical Review Accelerators and Beams},

  number       = 5,

  volume       = 22,

  place        = {United States},

  year         = {Mon May 13 00:00:00 EDT 2019},

  month        = {Mon May 13 00:00:00 EDT 2019}

}

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https://doi.org/10.1103/PhysRevAccelBeams.22.050101

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Cited by: 3 works

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Figures / Tables:

Fig. 1: LEReC layout. The 704 MHz SRF booster cavity is in the top right corner, next to the dc electron gun.

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Works referenced in this record:

Design and test of 704 MHz and 2.1 GHz normal conducting cavities for low energy RHIC electron cooler
journal, March 2019

Xiao, Binping; Belomestnykh, S.; Brennan, J. M.
Physical Review Accelerators and Beams, Vol. 22, Issue 3
DOI: 10.1103/PhysRevAccelBeams.22.030101

HOMs of the SRF Electron Gun Cavity in the BNL ERL
journal, January 2015

Hahn, H.; Ben-Zvi, I.; Belomestnykh, S.
Physics Procedia, Vol. 79
DOI: 10.1016/j.phpro.2015.11.056

Design, simulations, and conditioning of 500 kW fundamental power couplers for a superconducting rf gun
journal, July 2012

Xu, Wencan; Altinbas, Z.; Belomestnykh, S.
Physical Review Special Topics - Accelerators and Beams, Vol. 15, Issue 7
DOI: 10.1103/PhysRevSTAB.15.072001

Analytic methods for impedance calculations
conference, January 1999

Gluckstern, R. L.; Fedotov, A. V.
Workshop on instabilities of high intensity hadron beams in rings, AIP Conference Proceedings
DOI: 10.1063/1.1301877

Generation of 180 W average green power from a frequency-doubled picosecond rod fiber amplifier
journal, January 2017

Zhao, Zhi; Sheehy, Brian; Minty, Michiko
Optics Express, Vol. 25, Issue 7
DOI: 10.1364/OE.25.008138

Higher-order-mode (HOM) power in elliptical superconducting cavities for intense pulsed proton accelerators
journal, October 2002

Kim, Sang-ho; Doleans, Marc; Jeon, Dong-o
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 492, Issue 1-2
DOI: 10.1016/S0168-9002(02)01286-X

The external Q factor of a dual-feed coupling for superconducting radio frequency cavities: Theoretical and experimental studies
journal, November 2013

Dai, J.; Belomestnykh, S.; Ben-Zvi, I.
Review of Scientific Instruments, Vol. 84, Issue 11
DOI: 10.1063/1.4828790

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

Figures / Tables found in this record:

Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.

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Similar Records

Title: Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity

Abstract

Citation Formats

Figures / Tables:

Design and test of 704 MHz and 2.1 GHz normal conducting cavities for low energy RHIC electron cooler journal, March 2019

HOMs of the SRF Electron Gun Cavity in the BNL ERL journal, January 2015

Design, simulations, and conditioning of 500 kW fundamental power couplers for a superconducting rf gun journal, July 2012

Analytic methods for impedance calculations conference, January 1999

Generation of 180 W average green power from a frequency-doubled picosecond rod fiber amplifier journal, January 2017

Higher-order-mode (HOM) power in elliptical superconducting cavities for intense pulsed proton accelerators journal, October 2002

The external Q factor of a dual-feed coupling for superconducting radio frequency cavities: Theoretical and experimental studies journal, November 2013

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

Design and test of 704 MHz and 2.1 GHz normal conducting cavities for low energy RHIC electron cooler
journal, March 2019

HOMs of the SRF Electron Gun Cavity in the BNL ERL
journal, January 2015

Design, simulations, and conditioning of 500 kW fundamental power couplers for a superconducting rf gun
journal, July 2012

Analytic methods for impedance calculations
conference, January 1999

Generation of 180 W average green power from a frequency-doubled picosecond rod fiber amplifier
journal, January 2017

Higher-order-mode (HOM) power in elliptical superconducting cavities for intense pulsed proton accelerators
journal, October 2002

The external Q factor of a dual-feed coupling for superconducting radio frequency cavities: Theoretical and experimental studies
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Design and Performance of the Cornell ERL DC Photoemission Gun
conference, January 2009