List of Working Groups & Issues

VLHC Workshop on Accelerator Physics

February 22-25, 1999

• Single Particle Dynamics Issues
• The Role of Synchrotron Radiation
  •  Does SR at high field lessen the field quality requirements at injection?
  • What is a viable magnet bore aperture, considering beam-screen requirements?
  • What correction systems help or hurt this situation?
  • Does SR simplify the IR optical design (doublets vs. triplets)?
• Lattice Modules
  • Cells, dispersion suppressors, etc.
  • Control of SR damping parameters
• Correction Schemes
  • Phase trombones, local corrections, etc.
  • Are sparsely distributed corrector packages viable?
  • Tuning issues for 2-in-1 magnet designs, esp. Combined Function magnets
• Interaction Region design issues
  • Doublet optics for flat beams
  • Crossing angles and dispersion control

• Multiparticle Beam Dynamics Issues:
• Beam-beam Interaction
  • Practical tune shift limits with flat proton beams
  • IR crossing angle designs, crab crossings, beam steering, etc.
• Instabilities and Feedback
  • Head-tail resistive wall
  • Feedforward vs. feedback
• Emittance Evolution and Control
  • Intrabeam Scattering
  • Ground motion issues

• Energy Deposition Issues -
• Beam-induced radiation effects and limits
• Operational conditions
• Accidental conditions
• Beam Abort System
  • Instantaneous beam power
  • Total stored beam energy
  • Beam extraction
  • Beam channel
  • Beam absorber

• Beam collimation
• Halo formation
• Possible collimation schemes
• Collimation using bent crystal
• Interaction Region Issues
  • Triplet/Doublet protection from IP products
  • Triplet/Doublet protection from beam
  • Beam-induced effect on detector performance
    

rev. Feb. 25, 1999