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Yu-Chiu Chao

Staff Scientist

Contact:

  • Center for Advanced Studies of Accelerators
    Thomas Jefferson National Accelerator Facility
    12000 Jefferson Avenue, Newport News, VA 23606
  • 757-269-6292 (phone)
    757-269-5024 (fax)
  • chao@jlab.org

Education:
  • BS Physics, National Taiwan University, Taipei, 1979
  • MS Physics, Indiana University, Bloomington, 1981
  • PhD Physics, University of Michigan, Ann Arbor, 1986

Career:
  • Research Associate, Booster Group, Fermi National Accelerator Laboratory, 1986-1989
  • Accelerator Physicist, SLC Department, Stanford Linear Accelerator Center, 1989-1992
  • Staff Scientist, CASA (formerly Accelerator Physics Department), Thomas Jefferson National Accelerator Facility, 1992-present
  • Scientific Associate (on leave from Jefferson Lab), European Organization for Nuclear Research (CERN), 2000-2001

Research Highlights:
  • Algorithm Development for Accelerator Diagnostics, Analysis and Control
  • Generalized Orbit Correction
    5X5 Beam Phase Space Determination
    Beam Profile Extraction Algorithms
    Transfer Matrix Measurement
    Global Optical Matching Solutions
    Orbit Interpretation and Virtual Monitors
    Beam Based Alignment
  • CEBAF 12 GeV Upgrade Design Work
  • Beam Transport, Separation & Recombination Baselines
    Global Optical Properties
    Limits on Magnet Shunt Systems
    Extraction Schemes
    Injector Recirculation Design
    Linac Profile Optimization
    Diagnostics & Control Configuration
  • Accelerator Operational Configuration Evaluation and Optimization
  • Orbit Correction Systems
    Orbit & Energy Feedback Systems
    Beam Phase Space Measurements
    Optical Matching Systems
  • Control Applications for CEBAF Operation
  • Autosteer
    Automatch (Twiss Matching)
    Automatch (Transport Matching)
    Courant Snyder Display
    Multipass Linac Beam Based Alignment Analysis
    Participation in Other High Level Application Developments
  • Orbit Correction Configuration Evaluation and Optimization Service to the Accelerator Community
  • Ongoing:
    TT2-TT10-SPS line, CERN
    CLIC Test Facility 3 EPA Ring, CERN
    LCLS, SLAC
    Recycler, Fermilab

    Concluded:
    LHC Injection Transfer Line, CERN
    CNGS Line, CERN
    PS Booster Extraction/Recombination System, CERN
  • Participation in the Development of the Accelerator Modeling and Analysis Program BeamOptics

  • Design of Minimal Emittance Growth Transport Arcs


Publications

Partial List of Recent Publications and Reports:

Hall B Profile Measurement and Matching, CASA Report in preparation, 2001.

A full-order, almost-deterministic optical matching algorithm, Proceedings of the 2001 Particle Accelerator Conference.

Analysis and measurement of coupling effects in the transfer line from PS to SPS for the LHC proton beam (with G. Arduini et al), Proceedings of the 2001 Particle Accelerator Conference.

Optimization of Orbit Correction Systems Using Generalized Response Matrices and its Application to the LHC Injection Transfer Lines (with V. Mertens), Proceedings of the 2001 Particle Accelerator Conference.

Analysis and optimization of Orbit Correction Configurations Using Generalized response Matrices and its Application to the LHC Transfer Lines TI 2 and TI 8 (with V. Mertens), LHC Project Report 470, May 2001.

Simultaneous multiple pass steering at Jefferson Lab, Proceedings of the 1999 Particle Accelerator Conference, New York, 1999.

A transport arc design with minimized synchrotron radiation induced emittance growth. JLAB-TN 99-037, 1999.

Optimized multiple pass linac beam profile and matching to Spreader and Recombiners. JLAB-TN 99-036, 1999.

Shunt limits as a function of CEBAF energy increase. JLAB-TN-99-034, 1999

Orbit correction methods – basic formulation, current application at Jefferson lab, and future possibilities. CERN Yellow Report 99-07. 1999

Recent / Upcoming Conference Talks and Seminars:

Verifying Machine Configuration by Operational Criteria, to be presented at the ABS Workshop, San Jose, December 2001.

A Global Matching Algorithm and First Experimental Results, to be presented at at the ABS Workshop, San Jose, December 2001

Optimizing Orbit Correction Configuration -  Method and Applications, Jefferson Lab Accelerator Physics Seminar, June 8, 2001

New results in TT2-TT10 Matching, presented at the 11th LHC Workshop, Chamonix, France, January 15, 2001.

TT10 line Beam Profile Measurement and Optics Studies, CERN SPS-LEP Working Group Seminar, December 12, 2000

BEAMOPTICS: A Symbolic Platform for Beam Optical System Modeling and Solution, presented at the 6th International Conference on Computational Accelerator Physics, Darmstadt, Germany, September 15, 2000.

An Almost Deterministic Automated Matching Algorithm and Preliminary Tests at Jefferson Lab, CERN SL Division Seminar, June 15, 2000.

Orbit correction methods – basic formulation, current application at Jefferson lab, and future possibilities, presented at the ABS Workshop, CERN, December 1998.

(and complete list of papers)

Professional Activities

  • Scientific Advisory Committee, 2001 Workshop on Automated Beam Steering and Shaping
  • Affiliated Member of ABS Project at CERN
  • Member of BeamOptics Editorial Board



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