Chong-Jer Liaw

Brookhaven National Laboratory

Collider Accelerator Department
Bldg. 911B
P.O. Box 5000
Upton, NY 11973-5000

(631) 344-3207
(631) 974-0393
liaw@bnl.gov

Expertise | Education | Appointments | Publications | Certifications

Expertise

Developed or Upgrdes equipment for the accelerator use.  The major developed equipment include:  EIC Ultra-Fast Pulsed system, LEReC DC Gun, Cathode Puck Insertion/transfer, and Photocathode Production System, EBIS Laser Ion Source (V.1 and V.2), RHIC Stochastic cooling kickers and pickups, RHIC BBLR Compensator, SNS Beam Diagnostic instruments, and RHIC STAR SVT.  The major upgraded equipment includes RHIC Mask Assembly, AGS Fast Spin Resonance Jump Quad Magnet, RHIC 9 MHz Cavity, RHIC 6300 amp and 12 x 150 cryogenic magnet power leads, and Booster Wall Current Monitor upgrade.

Modeling and Analysis using ANSYS and SINDA/FLUINT.  ANSYS was used to perform linear/nonlinear structual analysis on the newly design structures, such as: pressure vessels and magnets and to perform linear/nonlinear thermal analysis to the heating problems generated on the magnets and on the electronics.  SINDA/FLUINT was used to successfully simulate the scenario, when there is a catastrophic failure in the cooling lines, similar to LHC superconducting bus failure, in RHIC's helium distribution system.  ODH requirement in the RHIC tunnel was re-classified, basing on the simulation results.

Lead and Manage projects: EBIS Laser Ion Source,  EIC Ultra-fast striplinen kicker system, LEReC DC gun system,  RHIC Stochastic cooling kicker & pickup, SNS Diagnostic instruments, and RHIC STAR SVT.                                                                                                                                                 

Experiences: ASME pressure vessel codes,SF6 gas safety, Creo and Autocad 3D modeling, ANSYS anaysis. 

Education

Ph.D.     Lehigh University, Bethlehem, Pennsylvania, 1986.     Major: Mechanical Engineering

MS.      National Cheng-Kung University, Taiwan, 1977.             Major: Mechanical Engineering.

BS.        National Cheng-Kung University, Taiwan, 1975.            Major: Naval Arch. & Marine Eng.

Professional Appointments

Principal Mechanical Engineer, Collider Accelerator Department (2015 - present)

Project Engineer I, Collider Accelerator Department (2007  - 2014)

Project Engineer II, Relativistic Heavy Ion Collider (1992 -  2006)

Sr. Mechanical Engineer, Private Aerospace and PC board Industries (1986-1992)

Selected Publications

• Sangroula M, Liaw C-J, Liu C, et al (2021) Optimization of the Hadron Ring Stripline Injection Kicker for the EIC. Proceedings of the 12th International Particle Accelerator Conference IPAC2021:Brazil. https://doi.org/10.18429/JACOW-IPAC2021-WEPAB193
• Liaw C-J, De Monte V, DeSanto L, et al (2017) Cathode Puck Insertion System Design for the LEReC Photoemission DC Electron Gun. Proceedings of the North American Particle Accelerator Conf NAPAC2016:USA. https://doi.org/10.18429/JACOW-NAPAC2016-WEPOB58
• Kanesue T, Alessi J, Beebe E, et al (2014) The Commissioning of the Laser Ion Source for RHIC-EBIS. Proceedings of the 5th Int Particle Accelerator Conf IPAC2014:Germany. https://doi.org/10.18429/JACOW-IPAC2014-WEOAB01

Certifications

PE: New York State Registered Professional Engineer.

Training Certificates: ASME Boiler & Pressure Vessel Code, Section VIII, Div. 1.

                                       ASME Boiler & Pressure Vessel Code, Section VIII, Div. 2.

                                       ASME B31.3 Process Piping Code.

                                        Work Planning & Control