Obtaining transverse cooling with nonmagnetized electron beam

Seletskiy, S.; Blaskiewicz, M.; Drees, A.; Fedotov, A.; Fischer, W.; Gu, X.; Hulsart, R.; Kayran, D.; Kewisch, J.; Liu, C.; Minty, M.; Ptitsyn, V.; Schoefer, V.; Sukhanov, A.; Thieberger, P.; Zhao, H.

doi:10.1103/PhysRevAccelBeams.23.110101

Title: Obtaining transverse cooling with nonmagnetized electron beam

Abstract

The first electron cooling with rf-accelerated electron bunches was recently demonstrated at the low energy RHIC electron cooler (LEReC) at BNL. Successful cooling requires that the electrons in the cooling section have a small angular spread and are well aligned with respect to the copropagating ions. LEReC puts into practice a nonmagnetized cooling of the ions at Lorentz factors of γ=4.1 and 4.9. Hence, unlike in previous coolers, in which the transverse electron dynamics is constrained by longitudinal solenoid fields, the ion-electron focusing and steering strongly contribute to the average angular spread of the electron beam. In this paper we discuss the factors that affect the electron angles and describe the process of tuning the electron beam to maximize the cooling of ion bunches in RHIC.

Authors:

; Blaskiewicz, M.;

; Fedotov, A.;

; Gu, X.; Hulsart, R.; Kayran, D.; Kewisch, J.; Liu, C.;

; Ptitsyn, V.; Schoefer, V.; Sukhanov, A.;

; Zhao, H.

Publication Date:: Mon Nov 30 00:00:00 EST 2020

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

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

OSTI Identifier:: 2325271

Alternate Identifier(s):: OSTI ID: 1763353

Report Number(s):: BNL-220913-2021-JAAM
Journal ID: ISSN 2469-9888; PRABCJ; 110101

Grant/Contract Number:: SC0012704

Resource Type:: Published Article

Journal Name:: Physical Review Accelerators and Beams

Additional Journal Information:: Journal Name: Physical Review Accelerators and Beams Journal Volume: 23 Journal Issue: 11; Journal ID: ISSN 2469-9888

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; Beam cooling; beam dynamics

Citation Formats


                    Seletskiy, S., Blaskiewicz, M., Drees, A., Fedotov, A., Fischer, W., Gu, X., Hulsart, R., Kayran, D., Kewisch, J., Liu, C., Minty, M., Ptitsyn, V., Schoefer, V., Sukhanov, A., Thieberger, P., and Zhao, H. Obtaining transverse cooling with nonmagnetized electron beam.  United States: N. p., 2020. 
Web.  doi:10.1103/PhysRevAccelBeams.23.110101.

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                    Seletskiy, S., Blaskiewicz, M., Drees, A., Fedotov, A., Fischer, W., Gu, X., Hulsart, R., Kayran, D., Kewisch, J., Liu, C., Minty, M., Ptitsyn, V., Schoefer, V., Sukhanov, A., Thieberger, P., & Zhao, H. Obtaining transverse cooling with nonmagnetized electron beam.  United States.  https://doi.org/10.1103/PhysRevAccelBeams.23.110101

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                    Seletskiy, S., Blaskiewicz, M., Drees, A., Fedotov, A., Fischer, W., Gu, X., Hulsart, R., Kayran, D., Kewisch, J., Liu, C., Minty, M., Ptitsyn, V., Schoefer, V., Sukhanov, A., Thieberger, P., and Zhao, H. Mon .  
"Obtaining transverse cooling with nonmagnetized electron beam".  United States.  https://doi.org/10.1103/PhysRevAccelBeams.23.110101.

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@article{osti_2325271,

  title        = {Obtaining transverse cooling with nonmagnetized electron beam},

  author       = {Seletskiy, S. and Blaskiewicz, M. and Drees, A. and Fedotov, A. and Fischer, W. and Gu, X. and Hulsart, R. and Kayran, D. and Kewisch, J. and Liu, C. and Minty, M. and Ptitsyn, V. and Schoefer, V. and Sukhanov, A. and Thieberger, P. and Zhao, H.},

  abstractNote = {The first electron cooling with rf-accelerated electron bunches was recently demonstrated at the low energy RHIC electron cooler (LEReC) at BNL. Successful cooling requires that the electrons in the cooling section have a small angular spread and are well aligned with respect to the copropagating ions. LEReC puts into practice a nonmagnetized cooling of the ions at Lorentz factors of γ=4.1 and 4.9. Hence, unlike in previous coolers, in which the transverse electron dynamics is constrained by longitudinal solenoid fields, the ion-electron focusing and steering strongly contribute to the average angular spread of the electron beam. In this paper we discuss the factors that affect the electron angles and describe the process of tuning the electron beam to maximize the cooling of ion bunches in RHIC.},

  doi          = {10.1103/PhysRevAccelBeams.23.110101},

  journal      = {Physical Review Accelerators and Beams},

  number       = 11,

  volume       = 23,

  place        = {United States},

  year         = {Mon Nov 30 00:00:00 EST 2020},

  month        = {Mon Nov 30 00:00:00 EST 2020}

}

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Works referenced in this record:

High-energy electron cooling in a collider
journal, November 2006

Fedotov, A. V.; Ben-Zvi, I.; Bruhwiler, D. L.
New Journal of Physics, Vol. 8, Issue 11
DOI: 10.1088/1367-2630/8/11/283

Stochastic cooling and the accumulation of antiprotons
journal, July 1985

van der Meer, S.
Reviews of Modern Physics, Vol. 57, Issue 3
DOI: 10.1103/RevModPhys.57.689

Attainment of an MeV-range, DC electron beam for the Fermilab cooler
journal, October 2004

Shemyakin, A.; Burov, A.; Carlson, K.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 532, Issue 1-2
DOI: 10.1016/j.nima.2004.06.073

Effect of beam-beam kick on electron beam quality in first bunched electron cooler
journal, November 2019

Seletskiy, S.; Blaskiewicz, M.; Fedotov, A.
Journal of Physics: Conference Series, Vol. 1350
DOI: 10.1088/1742-6596/1350/1/012134

Experimental Demonstration of Hadron Beam Cooling Using Radio-Frequency Accelerated Electron Bunches
journal, February 2020

Fedotov, A. V.; Altinbas, Z.; Belomestnykh, S.
Physical Review Letters, Vol. 124, Issue 8
DOI: 10.1103/PhysRevLett.124.084801

Applications of electron cooling in atomic, nuclear and high-energy physics
journal, May 1990

Poth, Helmut
Nature, Vol. 345, Issue 6274
DOI: 10.1038/345399a0

Experimental Demonstration of Relativistic Electron Cooling
journal, January 2006

Nagaitsev, Sergei; Broemmelsiek, Daniel; Burov, Alexey
Physical Review Letters, Vol. 96, Issue 4
DOI: 10.1103/PhysRevLett.96.044801

An effective method of damping particle oscillations in proton and antiproton storage rings
journal, May 1967

Budker, G. I.
Soviet Atomic Energy, Vol. 22, Issue 5
DOI: 10.1007/BF01175204

High-brightness electron beams for linac-based bunched beam electron cooling
journal, February 2020

Kayran, D.; Altinbas, Z.; Bruno, D.
Physical Review Accelerators and Beams, Vol. 23, Issue 2
DOI: 10.1103/PhysRevAccelBeams.23.021003

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

Operational Stochastic Cooling in the Relativistic Heavy-Ion Collider
journal, May 2008

Blaskiewicz, M.; Brennan, J. M.; Severino, F.
Physical Review Letters, Vol. 100, Issue 17
DOI: 10.1103/PhysRevLett.100.174802

Accurate setting of electron energy for demonstration of first hadron beam cooling with rf-accelerated electron bunches
journal, November 2019

Seletskiy, S.; Blaskiewicz, M.; Drees, A.
Physical Review Accelerators and Beams, Vol. 22, Issue 11
DOI: 10.1103/PhysRevAccelBeams.22.111004

Brownian Motion, Dynamical Friction, and Stellar Dynamics
journal, July 1949

Chandrasekhar, S.
Reviews of Modern Physics, Vol. 21, Issue 3
DOI: 10.1103/RevModPhys.21.383

Optical principles of beam transport for relativistic electron cooling
journal, September 2000

Burov, A.; Nagaitsev, S.; Shemyakin, A.
Physical Review Special Topics - Accelerators and Beams, Vol. 3, Issue 9
DOI: 10.1103/PhysRevSTAB.3.094002

A Can0nical Integrati0n Technique
journal, August 1983

Ruth, Ronald D.
IEEE Transactions on Nuclear Science, Vol. 30, Issue 4
DOI: 10.1109/TNS.1983.4332919

Stable operation of a high-voltage high-current dc photoemission gun for the bunched beam electron cooler in RHIC
journal, January 2020

Gu, X.; Altinbas, Z.; Badea, S.
Physical Review Accelerators and Beams, Vol. 23, Issue 1
DOI: 10.1103/PhysRevAccelBeams.23.013401

Cooling simulation and experimental benchmarking for an rf-based electron cooler
journal, July 2020

Zhao, H.; Blaskiewicz, M.; Fedotov, A. V.
Physical Review Accelerators and Beams, Vol. 23, Issue 7
DOI: 10.1103/PhysRevAccelBeams.23.074201

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Title: Obtaining transverse cooling with nonmagnetized electron beam

Abstract

Citation Formats

High-energy electron cooling in a collider journal, November 2006

Stochastic cooling and the accumulation of antiprotons journal, July 1985

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An effective method of damping particle oscillations in proton and antiproton storage rings journal, May 1967

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Brownian Motion, Dynamical Friction, and Stellar Dynamics journal, July 1949

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Stable operation of a high-voltage high-current dc photoemission gun for the bunched beam electron cooler in RHIC journal, January 2020

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High-energy electron cooling in a collider
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Stochastic cooling and the accumulation of antiprotons
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Effect of beam-beam kick on electron beam quality in first bunched electron cooler
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Experimental Demonstration of Hadron Beam Cooling Using Radio-Frequency Accelerated Electron Bunches
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Applications of electron cooling in atomic, nuclear and high-energy physics
journal, May 1990

Experimental Demonstration of Relativistic Electron Cooling
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An effective method of damping particle oscillations in proton and antiproton storage rings
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