1.1      BCDS - Bunch Compressor Design

Task Manager: M. Pedrozzi (PSI)

 

1.1.1        Milestones

• Goal 1. Recruit a post-doc accelerator scientist.         
• Milestones
• January 05: Advertise post doc. positions at PSI (completed).
• April 05: Creation of a Web site for the BCDS Task (completed -http://eurotev.web.psi.ch/)
• March 05: Post doc Recruited (Frank Schulte, DESY) (completed)
• July 05: Post doc starting his work at PSI.

 

• Goal 2. Beam specifications for Multi TeV compressor and path length tuning chicane.
• Milestones
• June 05: Produce first set of beam specifications and performance goals for the compressor to be discussed within ILPS.
• July 05: Produce specifications for path length chicane (compression + phase and energy correction)
• August 05: Definitive specification and performance goal for simulation work

 

• Goal 3. Chicane, first order conceptual designs.
• Milestones
• December 05: Design with linear chirp and Gaussian electron distributions. .Optimization with 1D CSR effects and with respect to ISR.
  
• December 05: Benchmark CSR computation with different 1D model.
• January 06: Chicane after turn around loop design with linear chirp and Gaussian electron distributions. Optimization with 1D CSR effects.
• January 06: Chicane Benchmark CSR computation with different 1D mode

 

• Goal 4: Chicane second order conceptual designs.
• Milestones

• June 06: Compression chicane optimization with 2D and 3D CSR models.
• June 06: Path length/compression chicane optimization with 2D and 3D CSR models

 

1.1.2        Following activities

• Compression chicane, third order conceptual design
• Compression chicane optimization using phase space distributions from start to end simulations (exchange between tasks).
• Path length/compression chicane optimization using phase space distributions from start to end simulations.

 

• Chicane fourth order conceptual designs
• Compression chicane lattice design and performance study with respect to dynamic and static imperfections (energy jitter, alignment errors).
• Turn around lattice design.

 

1.1.3        Task integration

The task activities should be integrated and considered as an extension of the present effort made for the ILC bunch compressor design, mainly coordinated by SLAC (http://www-project.slac.stanford.edu/ilc/acceldev/LET/BC/). The multi-TeV beam parameters specifications upstream and downstream of the chicanes are presently driven by the CLIC requirements. The transport studies from the damping ring to the IP (task LAST) should give a realistic phase space for the ultimate chicane optimisation. The chicane simulation results and in particular the sensitivity to dynamic and static imperfections requires as well a close interaction with the LAST activities.

1.1.4        Deliverables

The deliverables in Jan 2008 are the following.

1.    A conceptual design of a compression chicane suitable for multi-TeV linear colliders with an evaluation of the CSR effects and the compressor performances.

2.    A conceptual design of a path length tuning chicane including the CSR effects and the turn around loop lattice.