General Lab Information

Yun Luo

Accelerator Design, Electron-Ion Collider

Yun Luo

Brookhaven National Laboratory

Electron-Ion Collider
Bldg. 911B
P.O. Box 5000
Upton, NY 11973-5000

(631) 344-4121
yluo@bnl.gov

Dr. Yun Luo is an accelerator physicist in the Electron-Ion Collider Directorate at Brookhaven National Laboratory (BNL).  Before he joined BNL in 2003, he had been working on the Beijing Electron-positron Collider (BEPC) at IHEP  and the Large Hadron Collider (LHC) at CERN.  In 2006,  Dr. Luo proposed and demonstrated a global betatron decoupling feedback based on a continuous coupling measurement.  Dr. Luo carried out a sophisticated weak-strong beam-beam simulation for RHIC head-on beam-beam compensation with electron lenses, which became operational  in 2015 RHIC proton run and improved  the luminosity.  Dr. Luo was the run coordinator of the 2012 RHIC U-U and Cu-Au runs, during which he proposed new lattice configurations to greatly improve the off-momentum dynamic aperture and the beam lifetime.  Burning-off dominated physics stores and  peak luminosity exceeding initial one at the beginning of store were first observed in the U-U collision. Since 2016, Dr. Luo began to work on EIC accelerator physics design. Currently he is mainly working on EIC   beam-beam interaction simualtion studies, HSR dynamic aperture calculation / improvement with beam-beam and nonlinear magnetic field errors and other lattice or machine errors,  detector solenoid effect compensation in IR6,  HSR local and global betatron coupling correction. Dr. Luo also serves as the coordinator for RHIC Accelerator Physics Experiment (APEX) program since 2014.

Expertise | Research | Education | Appointments | Publications

Expertise

 Linear and nonlinear beam dynamics and methods,  sympletic orbit tracking and spin tracking, dynamic aperture calculation and optimization, weak-strong and strong-strong beam-beam interaction simulation, operational beam-beam compensation, online betatron coupling measurement and compensation feedback,  online linear and nonlinear optics measurement and correction, collider accelerator operational data analysis and modeling, etc.

Research Activities

Currently mainly working on EIC  beam-beam interaction simualtion, EIC HSR dynamic aperture with beam-beam and optics & machine errors,  detector solenoid effect compensation, global betatron coupling correction, and so  on.

Education

Ph. D in Accelerator Physics, Institue of High Energy Phsyics, Chinese Academy of Science, 2000

MS in Nuclear Physics and Technology, Beijing Normal University, 1995

BS in Physics, Beijing Normal University, 1992

Professional Appointments

Physicist,  Collider-Accelerator Department, Brookhaven National Laboratory, 2009

Associate Physicist, Accelerator Center, Institute of High Energy Physics ( Beijing ), 2003

Research Associate, SL-AP Group, CERN, 2000

Selected Publications

  • Luo Y, Xu D, Blaskiewicz M, Montag C (2024) Experimental Demonstration of a Large Transverse Emittance Ratio 11:1 in the Relativistic Heavy Ion Collider for the Electron-Ion Collider. Physical Review Letters 132:. https://doi.org/10.1103/physrevlett.132.205001
  • Fischer W, Gu X, Altinbas Z, et al (2015) Operational Head-on Beam-Beam Compensation with Electron Lenses in the Relativistic Heavy Ion Collider. Physical Review Letters 115:. https://doi.org/10.1103/physrevlett.115.264801
  • Bai M, Roser T, Ahrens L, et al (2006) Polarized Proton Collisions at 205 GeV at RHIC. Physical Review Letters 96:. https://doi.org/10.1103/physrevlett.96.174801
  • Luo Y, Fischer W, Abreu NP, et al (2012) Six-dimensional weak-strong simulation of head-on beam-beam compensation in the Relativistic Heavy Ion Collider. Physical Review Special Topics - Accelerators and Beams 15:. https://doi.org/10.1103/physrevstab.15.051004
  • Luo Y, Fischer W, Blaskiewicz M, et al (2014) Burn-off dominated uranium and asymmetric copper-gold operation in RHIC. Physical Review Special Topics - Accelerators and Beams 17:. https://doi.org/10.1103/physrevstab.17.081003
  • Luo Y, Fischer W, White S (2016) Analysis and modeling of proton beam loss and emittance growth in the Relativistic Heavy Ion Collider. Physical Review Accelerators and Beams 19:. https://doi.org/10.1103/physrevaccelbeams.19.021001
  • Xu D, Hao Y, Luo Y, Qiang J (2021) Synchrobetatron resonance of crab crossing scheme with large crossing angle and finite bunch length. Physical Review Accelerators and Beams 24:. https://doi.org/10.1103/physrevaccelbeams.24.041002
  • Liu C, Adams P, Beebe E, et al (2022) Gold-gold luminosity increase in RHIC for a beam energy scan with colliding beam energies extending below the nominal injection energy. Physical Review Accelerators and Beams 25:. https://doi.org/10.1103/physrevaccelbeams.25.051001
  • Luo Y, Cameron P, Dellapenna A, et al (2006) Continuous measurement of global difference coupling using a phase-locked-loop tune meter in the Relativistic Heavy Ion Collider. Physical Review Special Topics - Accelerators and Beams 9:. https://doi.org/10.1103/physrevstab.9.124001
  • Luo Y, Cameron P, Della Penna A, et al (2005) Measurement of global betatron coupling with skew quadrupole modulation. Physical Review Special Topics - Accelerators and Beams 8:. https://doi.org/10.1103/physrevstab.8.014001
  • Luo Y, Cameron P, Della Penna A, et al (2005) Fast and robust global decoupling with coupling angle modulation. Physical Review Special Topics - Accelerators and Beams 8:. https://doi.org/10.1103/physrevstab.8.074002
  • Luo Y, Bai M, Pilat F, et al (2005) Measurement of IR optics with linear coupling's action-angle parametrization. Physical Review Special Topics - Accelerators and Beams 8:. https://doi.org/10.1103/physrevstab.8.084001
  • Luo Y (2004) Linear coupling parametrization in the action-angle frame. Physical Review Special Topics - Accelerators and Beams 7:. https://doi.org/10.1103/physrevstab.7.124001
  • Luo Y (2015) SimTrack: A compact c++ code for particle orbit and spin tracking in accelerators. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 801:95–103. https://doi.org/10.1016/j.nima.2015.08.014
  • Luo Y (2006) Matrix perturbation approach to the weak linear coupling. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 566:218–226. https://doi.org/10.1016/j.nima.2006.06.066
Yun Luo

Brookhaven National Laboratory

Electron-Ion Collider
Bldg. 911B
P.O. Box 5000
Upton, NY 11973-5000

(631) 344-4121
yluo@bnl.gov

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